Pollution Seminar
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Introduction
Pollution and Waste Management aims to facilitate and develop programmes, projects,co-operative management and policy mechanisms, measures and decision-support
systems to ensure integrated pollution and waste management.
Pollution and Waste Management also aims to:
Ensure efficient and effective provision of staff for the new structure and
development of personnel
Collect, analyse and disseminate relevant and current information regarding
pollution and waste management
Promote programmes on pollution and waste management that give effect tointegrated pollution and waste management
Promote public participation in environmental governance and decision-making
with respect to integrated pollution and waste management Provide efficient and effective support to all clients and ensure co-operative
governance to achieve integrated pollution and waste management
Develop and implement pollution and waste management legislation, policies,
norms, standards and guidelines and ensure compliance with relevant environmentallegislation.
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Pollution
What Is Pollution?
Pollution is the introduction of contaminants into an environment that causes instability,
disorder, harm or discomfort to the ecosystem i.e. physical systems or livingorganisms. Pollution can take the form ofchemical substances orenergy such as noise,
heat, or light. Pollutants, the elements of pollution, can be foreign substances or energies
or naturally occurring; when naturally occurring, they are considered contaminants whenthey exceed natural levels. Pollution is often classed as point source ornon point source
pollution. The Blacksmith Institute issues annually a list of the world's worst polluted
places. In the 2007 issues the ten top nominees are locatedin Azerbaijan, China, India,Peru,Russia,Ukraine and Zambia.
Official acknowledgement
The earliest known writings concerned with pollution were Arabic medicaltreaties written between the 9th and 13th centuries. The works covered a number of
subjects related to pollution such as air contamination, water contamination, soilcontamination, solid waste mishandling, and environmental assessments of certain
localities.
King Edward I of England banned the burning of sea-coal by proclamation in London in
1272, after its smoke had become a problem. But the fuel was so common in England thatthis earliest of names for it was acquired because it could be carted away from some
shores by the wheelbarrow. Air pollution would continue to be a problem in England,
especially later during the industrial revolution, and extending into the recent past withthe great Smog Of 1952.This same city also recorded one of the earlier extreme cases of
water quality problems with the Great Stink on the Thames of 1858, which led to
construction of the London Sewerage System soon afterward.
It was the industrial revolution that gave birth to environmental pollution as we know ittoday. The emergence of great factories and consumption of immense quantities
of coal and other fossil fuels gave rise to unprecedented air pollution and the large
volume of industrial chemical discharges added to the growing load of untreated human
waste. Chicago and Cincinnati were the first two American cities to enact laws ensuringcleaner air in 1881. Other cities followed around the country until early in the 20th
century, when the short lived Office of Air Pollution was created under the Department
of the Interior. Extreme smog events were experienced by the cities of Los Angeles andDonora, Pennsylvania in the late 1940s, serving as another public reminder.
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Modern awareness
Pollution became a popular issue after WW2, when the aftermath of atomic warfare and
testing made evident the perils of radioactive fallout. Then a conventional catastrophic
event The Great Smog of 1952 in London killed at least 8000 people. This massive eventprompted some of the first major modern environmental legislation, The Clean Air Act of
1956.
Pollution began to draw major public attention in the United States between the mid-
1950s and early 1970s, when Congress passed theNoise Control Act, the Clean Air Act,the Clean Water Act and theNational Environmental Policy Act.
Bad bouts of local pollution helped increase consciousness. PCB dumping in the Hudson
Riverresulted in a ban by the EPA on consumption of its fish in 1974. Long-
term dioxin contamination at Love Canal starting in 1947 became a national news storyin 1978 and led to the Super fund legislation of 1980. Legal proceedings in the 1990s
helped bring to light Chromium-6 releases in California--the champions of whose victimsbecame famous. The pollution of industrial land gave rise to the name brown field, a term
now common in city planning. DDT was banned in most of the developed world after thepublication of Rachel Carson's Silent Spring.
The development of nuclear science introduced radioactive contamination, which can
remain lethally radioactive for hundreds of thousands of years. Lake Karachay, named by
the World watch Institute as the "most polluted spot" on earth, served as a disposal sitefor the Soviet Union thorough out the 1950s and 1960s. Second place may go to the to
the area of Chelyabinsk U.S.S.R. (see reference below) as the "Most polluted place on the
planet".
Nuclear weapons continued to be tested in the Cold War, sometimes near inhabited areas,especially in the earlier stages of their development. The toll on the worst-affected
populations and the growth since then in understanding about the critical threat to human
health posed by radioactivity has also been a prohibitive complication associatedwith nuclear power. Though extreme care is practiced in that industry, the potential for
disaster suggested by incidents such as those at Three Mile Island and Chernobylpose a
lingering specter of public mistrust. One legacy ofnuclear testing before most forms werebanned has been significantly raised levels ofbackground radiation.
International catastrophes such as the wreck of the Amoco Cadiz oil tanker off the coast
ofBrittany in 1978 and the Bhopal disasterin 1984 have demonstrated the universality of
such events and the scale on which efforts to address them needed to engage. The
borderless nature of atmosphere and oceans inevitably resulted in the implication ofpollution on a planetary level with the issue of global warming. Most recently the
termpersistent organic pollutant (POP) has come to describe a group of chemicals such
as PBDEs and PFCs among others. Though their effects remain somewhat less wellunderstood owing to a lack of experimental data, they have been detected in various
ecological habitats far removed from industrial activity such as the Arctic, demonstrating
diffusion and bioaccumulation after only a relatively brief period of widespread use.
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http://en.wikipedia.org/wiki/Noise_Control_Acthttp://en.wikipedia.org/wiki/Clean_Air_Acthttp://en.wikipedia.org/wiki/Clean_Water_Acthttp://en.wikipedia.org/wiki/National_Environmental_Policy_Acthttp://en.wikipedia.org/wiki/Polychlorinated_biphenylhttp://en.wikipedia.org/wiki/Hudson_Riverhttp://en.wikipedia.org/wiki/Hudson_Riverhttp://en.wikipedia.org/wiki/United_States_Environmental_Protection_Agencyhttp://en.wikipedia.org/wiki/Polychlorinated_dibenzodioxinshttp://en.wikipedia.org/wiki/Love_Canalhttp://en.wikipedia.org/wiki/Superfund_(environmental_law)http://en.wikipedia.org/wiki/Hexavalent_chromiumhttp://en.wikipedia.org/wiki/Californiahttp://en.wikipedia.org/wiki/Brownfieldhttp://en.wikipedia.org/wiki/City_planninghttp://en.wikipedia.org/wiki/DDThttp://en.wikipedia.org/wiki/Silent_Springhttp://en.wikipedia.org/wiki/Radioactive_contaminationhttp://en.wikipedia.org/wiki/Lake_Karachayhttp://en.wikipedia.org/wiki/Worldwatch_Institutehttp://en.wikipedia.org/wiki/Nuclear_weaponshttp://en.wikipedia.org/wiki/Cold_Warhttp://en.wikipedia.org/wiki/Radioactivityhttp://en.wikipedia.org/wiki/Nuclear_powerhttp://en.wikipedia.org/wiki/Three_Mile_Islandhttp://en.wikipedia.org/wiki/Chernobylhttp://en.wikipedia.org/wiki/Nuclear_testinghttp://en.wikipedia.org/wiki/Test_Ban_Treatyhttp://en.wikipedia.org/wiki/Test_Ban_Treatyhttp://en.wikipedia.org/wiki/Background_radiationhttp://en.wikipedia.org/wiki/Amoco_Cadizhttp://en.wikipedia.org/wiki/Brittanyhttp://en.wikipedia.org/wiki/Bhopal_disasterhttp://en.wikipedia.org/wiki/Persistent_organic_pollutanthttp://en.wikipedia.org/wiki/PBDEhttp://en.wikipedia.org/wiki/PFChttp://en.wikipedia.org/wiki/Noise_Control_Acthttp://en.wikipedia.org/wiki/Clean_Air_Acthttp://en.wikipedia.org/wiki/Clean_Water_Acthttp://en.wikipedia.org/wiki/National_Environmental_Policy_Acthttp://en.wikipedia.org/wiki/Polychlorinated_biphenylhttp://en.wikipedia.org/wiki/Hudson_Riverhttp://en.wikipedia.org/wiki/Hudson_Riverhttp://en.wikipedia.org/wiki/United_States_Environmental_Protection_Agencyhttp://en.wikipedia.org/wiki/Polychlorinated_dibenzodioxinshttp://en.wikipedia.org/wiki/Love_Canalhttp://en.wikipedia.org/wiki/Superfund_(environmental_law)http://en.wikipedia.org/wiki/Hexavalent_chromiumhttp://en.wikipedia.org/wiki/Californiahttp://en.wikipedia.org/wiki/Brownfieldhttp://en.wikipedia.org/wiki/City_planninghttp://en.wikipedia.org/wiki/DDThttp://en.wikipedia.org/wiki/Silent_Springhttp://en.wikipedia.org/wiki/Radioactive_contaminationhttp://en.wikipedia.org/wiki/Lake_Karachayhttp://en.wikipedia.org/wiki/Worldwatch_Institutehttp://en.wikipedia.org/wiki/Nuclear_weaponshttp://en.wikipedia.org/wiki/Cold_Warhttp://en.wikipedia.org/wiki/Radioactivityhttp://en.wikipedia.org/wiki/Nuclear_powerhttp://en.wikipedia.org/wiki/Three_Mile_Islandhttp://en.wikipedia.org/wiki/Chernobylhttp://en.wikipedia.org/wiki/Nuclear_testinghttp://en.wikipedia.org/wiki/Test_Ban_Treatyhttp://en.wikipedia.org/wiki/Test_Ban_Treatyhttp://en.wikipedia.org/wiki/Background_radiationhttp://en.wikipedia.org/wiki/Amoco_Cadizhttp://en.wikipedia.org/wiki/Brittanyhttp://en.wikipedia.org/wiki/Bhopal_disasterhttp://en.wikipedia.org/wiki/Persistent_organic_pollutanthttp://en.wikipedia.org/wiki/PBDEhttp://en.wikipedia.org/wiki/PFC -
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Growing evidence of local and global pollution and an increasingly informed public over
time have given rise to environmentalism and the environmental movement, which
generally seek to limit human impact on the environment.
Forms of PollutionThe various forms of pollution are
Air Pollution
Water Pollution
Land Pollution
Noise Pollution
Radioactive Pollution
Thermal Pollution
Air Pollution
Air pollution is indication of disturbances to the composition of compounds in the
atmosphere, as it may be summarized as shown:
excess emission of gases/vapors into atmosphere
saturation of chemical compounds/particulates
rate of dissipation < (smaller than) rate of absorption through various cycles (i.e.
carbon and nitrogen cycle)
emergence of new chemical reactions of reactive and non-biodegradablecompounds.
Global warming, acid rain, smog, ozone depletion are some effects of air pollution.
In relation to this, we may observe the cycle which involves in our daily lives: carbon and
nitrogen cycle. These 2 cycles are the most important of all, regulating the composition ofcarbon and nitrogen of Earth. Imagine the reverse is to happen....
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Sources and Methods
We can classify major sources that lead to air pollution to the following categories:
motor vehicle exhaust
heat and power generation facilities industrial processes
auto manufacturing
fertilizers plants building demolition
solid waste disposal
solvent evaporation
volcanic eruption fuel production
roadway construction
electrical components manufacturing
extraction of metals forest fires
agriculture
Water Pollution
Polluted river
Water pollution is contamination of water by foreign matter that deteriorates the quality
of the water. Water pollution covers pollutions in liquid forms like ocean pollution and
river pollution. As the term applies, liquid pollution occurs in the oceans, lakes, streams,rivers, underground water and bays, in short liquid-containing areas. It involves the
release of toxic substances, pathogenic germs, substances that require much oxygen to
decompose, easy-soluble substances, radioactivity, etc. that become deposited upon thebottom and their accumulations will interfere with the condition of aquatic ecosystems.
For example, the eutrophication: lack of oxygen in a water body caused by excessive
algae growths because of enrichment of pollutants.
Water Cycle and Pollution
Water cycle is, simply saying, the circulation of water in earth. In fact, the water in theearth's biosphere is used and reused again and again. This is called water cycle or
continuous movement of water between the earth and the atmosphere. It involves the
following mechanisms:
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Evaporation: changing of water from liquid to gas
Transpiration: Release of water vapor from plant leaves
Condensation: changing of vapor to liquid (cooled down)
Precipitation: Water that returns to the earth (water droplets in clouds become
large enough and there comes the rain).
What's the relation of water cycle and pollution?
According to the water cycle, naturally, water around us will be absorbed to the land(soil) and rivers will stream from the upstream to the downstream and released to the
sea. In normal situation organic pollutants are biodegraded by microbes and converted to
a form that brings benefits to the aquatic life. And for the inorganic pollutants, in the
same situation, don't bring to much hazards because they are widely dispersed and havealmost no effect to the environment which they are released to.
In a small scale, both inorganic and organic pollutants safely decompose throughout the
stream, their concentration decrease in the sea, and they don't harm the sea ecosystem andits distribution. But in an excessive scale, communities in beach and estuary will be
affected by the pollutants, and can heavily harm them.
Sources and Methods
We can classify major sources that lead to water pollution to the following categories:
petroleum products
synthetic agricultural chemicals
heavy metals
hazardous wastes excess organic matter sediment
infectious organisms
air pollution
thermal pollution
soil pollution
Land Pollution
Land Pollution
Revered to as soil pollution, land pollution involves the following mechanism:
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Deposition of solid waste
Accumulation of non-biodegradable materials
Toxification of chemicals into poisons
Alteration of soil chemical composition (imbalance of chemical equilibrium to
soil medium)
By as much, land pollution of this has a mass globally, everyday threatening the very
foundation and mechanical support of every matter on earth. Statistically, it has beenshown that:
loss of 6 million hectares of land per year
loss of 24 billion tons of topsoil per year
loss of minimum 15 million acres prime agricultural land to overuse andmismanagement
desertification of land results in the lost of 16 million per square miles of world's
land surface
The causes for such devastation are generally due to 2 (two) forms of malpractices:
Unhealthy soil management methods;
o improper tillage of soil in which excessive tillage result in the
deterioration of soil structureo non-maintenance of a proper supply of organic matter in the soil from the
imbalance composition of the reserves of organic matter especially
nitrogen, phosphorus and sulfur unplenished supply after cultivation ofvegetation, living the soil prone to soil infertility, unable to stabilize the
soil physicality which ultimately let to desertification
o
irregular maintenance of a proper nutrient supply of trace elements givesrise to the use of excessive synthetic fertilizers, which are non
biodegradable and accumulate in the soil system which eventually
destroys useful organisms such as bacteria, fungi and other organisms
o improper maintenance of the correct soil acidity which ultimately disrupt
the adaptation of various crops and native vegetation of different soils as
the solubility of minerals present will be affected. In a more acidic soil,
minerals tend to be more soluble and washed away during rainfall whilealkaline soil, minerals are more insoluble which form complex minerals
unable to be absorbed into the flora system physiological usage.
Improper irrigation practices;
o
poorly drained soil result in salt deposits leading to high soil salinity thatinhibit plant growth and may lead to crop failure
o unirrigated land giving rise to stagnation of agriculture waste products
which accumulates and increases land toxicity and also decreasing
o irregular irrigation leads to decreasing moisturization of land for soil
medium and replenishments of solvents for minerals
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Sources and Methods
We can classify major sources that lead to land pollution to the following categories:
agriculture
mining and quarrying sewage sludge
dredged spoils
household
demolitions and constructions
industrial
Noise Pollution
This particular pollution is ever increasing with due to the rise in the utilization of heavyduty machineries of industrial facilities and vehicles, synonymous to the increase in the
standard of living in most countries. We make sounds practically every seconds of ourday, but to the extend it has reached an unfavorable high intensity which had cause manydisturbances and irritation to others emotionally that has adverse effects on our daily
activities.
Noise levels can be measured by decibel method:
Decibel - one tenth of a bel where one bel represents a difference in level between two
intensities I1, I0 where one is ten times greater than the other. Thus, the intensity level isthe comparison of one intensity to another and may be expressed:
Intensity level = 10 log10 (I1/I0) (dB)
For instance, the difference between intensities of 10-8watts/m2 and 10-4 watts/m2, an
actual difference of 10,000 units, can be expressed as a difference of 4 bels or 40decibels.These are the few examples of threshold decibels of noises made:
Threshold of hearing 0 dB Motorcycle (30 feet 88 dB
Rustling leaves 20 dB Food blender (3 feet) 90 dB
Quiet whisper (3 feet) 30 dB Subway (inside) 94 dB
Quiet home 40 dB Diesel truck (30 feet) 100 dB
Quiet street 50 dB Power mower (3 feet) 107 dB
Normal conversation 60 dB Pneumatic riveter (3 feet) 115 dB
Inside car 70 dB Chainsaw (3 feet) 117 dB
Loud singing (3 feet) 75 dB Amplified Rock and Roll (6 feet) 120 dB
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Automobile (25 feet) 80 dB Jet plane (100 feet) 130 dB
Other noise measurement systems are:
community noise equivalent level
composite noise rating
equivalent energy level
noise and number index
noise exposure forecast
noise criterion
noise level noise pollution level
noise rating
perceived noise level
traffic noise index
sound level
sound level meter
sound pressure level
world soundscape project
Sources and Methods
We can classify major sources that lead to noise pollution to the following categories:
road traffic noise
air traffic
rail traffic
neighborhood and domestic noise
incompatible land use
industrial noises
Radioactive Pollution
The 40's was the era where the first nuclear bomb is being developed, and that's why it'scalled the nuclear era. However, nuclear energy has already researched back since 1900.
Nuclear era reached its greatest peak in the world war, by showing its massive ability of
destroying things.
Nuclear energy is a form of energy thats released by the splitting of atoms. Sincescientists have found a way to make use of the energy, it has also been used to generate
electricity.
Nuclear energy has been recognized as a clean energy because it doesnt release
pollutants such as CO2 to the atmosphere after its reaction that could damage our
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environment. It's also known that nuclear energy has reduced the amount of greenhouse
gas emission, reducing emissions of CO2 for about 500 million metric tons of carbon.
Despite the advantage of nuclear as a clean energy, the big concern is the waste resultedfrom nuclear reaction, which is a form of pollution, called radioactivity. Radioactivity is a
form of radiation (a form of energy that travels through space). Some elements in thisworld are naturally radioactive while some others are made to be. Radioactivity is emitted
when a radioactive element become unstable and begin to decay in the attempt to regaintheir molecular stability. When an element decays, it emits energy and small particles. If
its still radioactive, it will repeat the process, until it finally regains its molecular
stability and stop decaying. The time that it takes for half way of decaying process iscalled half-life, and this differs for each radioactive element. It possibly takes up to 4.5
billion years (Uranium 238) and as short as 8 days (Iodine 131). This process constantly
remains, not considering external factors such as pressure or temperature. This process isexpressed in units called becquerels. One becquerel is equal to one disintegration of
nuclei per second.
There are commonly three types of radiation, namely:
Alpha particles, can be blocked by a piece of paper and human skin.
Beta particles can penetrate through skin, while can be blocked by some pieces ofglass and metal.
Gamma rays can penetrate easily to human skin and damage cells on its way
through, reaching far, and can only be blocked by a very thick, strong, massivepiece of concrete.
Sources and Methods
We can classify major sources that lead to radioactive pollution to the following
categories:
nuclear power plants
nuclear weapon
transportation
disposal of nuclear waste
uranium mining
Thermal Pollution
This has become an increasing and the most current pollution, owing to the increasing
call of globalization everywhere. Heat produced from industries is a major contribution tothe pollution, much to the operation of the heavy industries which produces high amount
of heat energy. As we will show a summary to the event of this pollution happening:
Raw materials for productivity (organic and inorganic products)
Undergo different chemical reactions with several process
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Excess heat energy is produced as a waste product
Heat is released through into atmosphere (vapor) andriverine system (liquid).
Increase of temperature of environmental system
n view of the pollution, global temperature had increased significantly.
Measurements of atmospheric temperature are done by meteorological center of the
weather forecast annually, and the graph to detect the temperature trend from a period of
10 years will be compared with the previous batch of period. Thus we may be able toknow the rate of temperature increase overall and make reference to the standard level of
heat that should be maintain in the atmosphere to avoid large deviation of heat in the
system.
Pollutants
Pollutants are any substances that under excessive quantity in a wrong place and a wrongtime will cause impurity to the living environment. Simply put, they're the things that
cause pollution. Pollutants can be chemicals, ashes, sediment, organisms, heat, radiation,etc. which if exposed to the living environment will cause bad effects.
In this section we will discuss some of common pollutants exist today: the characteristics,
uses and effects.
Radioactive Materials
Biological Pollutants
Machineries
Transportation Synthetic Chemicals
Heavy Metals
Radioactive Materials
Classified under hazardous waste, wastes can be eithertoxic (poisonous), reactive (capable of producing explosive or toxic
gases), corrosive (capable of corroding steel) or ignitable (flammable).
Improper treatment and storage resulted in air, water and soilp
Types Characteristics Uses Effects
Radium (Ra) -silvery white radioactive
material
-radiation source for
treating neoplastic
disease
-radon source in
radiography of metals-neutron source for
-exposure via inhalation
has resulted in acute
leucopoenia
-oral exposure has
resulted in anemia,necrosis of the jaw,
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research abscess of the brain and
terminal
bronchopneumonia
-via oral exposure is
known to cause
lung, bone, brainand nasal passage
tumors
Radon (Rn) -colorless, odorless, tasteless
radioactive noble gas
-special hazard: radioactive
-cancer treatment
-earthquake prediction
-experimental studies
-health threat in homes
built on granite
-smokers exposed are at
greater risk of lung
cancer-exposure via inhalation
has resulted respiratory
effects (chronic lung
disease, pneumonia,
fibrosis of the lung)
-animal studies have
reported effects on
the blood and adecrease in body
weight
Uranium (U) -very heavy silvery white
radioactive metal
-combustible solid
-special hazard: radioactive
-routes of exposure: inhalation,
ingestion, skin and/or eye
contact-target organs: skin, kidneys,
bone marrow, lymphatic
system
-pigments for glass
-fuel in nuclear reactors
and nuclear bombs
-depleted uranium:
casings of armour
piercing arterial shells,
armour plating on tanksand as ballast in the
wings of some large
aircrafts
-uranium miners have
shown an increase in
lung cancer and tumors
of the lymphatic and
hematopoietic tissues
from inhalation
exposure-increase of deaths of
non malignant
respiratory disease
Plutonium (Pu) -artificially created radioactive
metal
-made by bombarding uranium
with neutrons
-used in bombs and
reactors
-carcinogenic which
promotes cancer
development
-mutation to body tissuesand cells
-disruption to normal
fetal development
Biological Pollutants
Biological pollutants are biodegradable substances which can be considered one of the
'cleanest' pollutants, however rate of accumulation currently in an area which is biggerthan the rate of decomposition has made this an undisputable contributory factor to
pollution.
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Types Characteristics Uses Effects
Soil pollutants Sediments
Due to soil erosion on hill slope
or coastline where loose soil
practices are washed down andcarried to streambed, lake orocean
Organic matter
Addition of fertilizers and
nutrients to promote plant
growth and development,
usually from urea and faecal
matter of animals, or
decomposition of deadorganism.
-decomposed matter
provides fertility to soil
for agriculture
-sediments can becollected and used forconstruction of barriers
-occurrence of landslip at
hillslope
-unbearable stench of
decomposing isimminent
-leeching of organic
matter to streambed,
lake or ocean, leading to
eutrophication
-depth of lake is reduced
as a result of
sedimentation
-change in original
geographical landscape
Water pollutants Microorganism
Due to evolution and mutation
microscopic organisms can be
viral and transmit diseases to
any living organisms consumingit, through secretion of poison
-reduction in clarity of
water in lakes
-cause for malaria
-cause for diarrhea due to
contamination ofdrinking water
-acne-like skin rash
-deadly viral attack can
cause death to living
organisms
Air pollutants Particulate matter
Due to volcanic eruption and
evaporation of gases such as
methane, sulfur dioxide,nitrogen dioxide and carbon
dioxide from decomposing
materials to the atmosphere
which accumulates gradually
and chemically reactive to react
-atmospheric visibilityreduce (haze, smog)
-build up of toxic
chemicals in theatmosphere harmful to
living organisms
-frequent asthma attack
-adverse respiratory
illness is imminent
Machineries
Increasing industrial activities with multiple productivity of goods by the extensive use ofmachineries resulted in extension of industries in rural areas, also the cause of increase in
noise disturbance and heat accumulation.
The effects of this activity are:
causes for irritation to daily activities
cause for boilermaker's disease and hearing loss anxiety, nervousness and loss of sleep
presbycusis
sociocusis
schizophonia
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excess heat emitted will return to environment, thus increasing mean surrounding
temperature, leading to thermal pollution
certain hazardous materials which is part of the machine (i.e. cadmium in nuclearfactor regulator) may wear off and released to environment.
Transportation
Convenience and alternatives to the mode of transportation worldwide sees an increase inemission of air pollutants as a result of fuel combustion and noise pollution from rail and
commercial aircraft.
The effects of this activity are:
increase in emissions of air pollutants: carbon monoxide (CO), lead (Pb), nitrogen
oxides (NO, NO2), carbon dioxide (CO2), volatile organic compounds (VOC),
persistent organic pollutants (POPs) excess heat emission as a result of heavy fuel combustion from increase use of
vehicles
annoyance and disturbances in intercity housing, with the centre and
transportation hub situated.
Synthetic chemicals
Complex chemical structure are non-biodegradable which accumulates and persists insoil, water and air can become toxic, thus a haphazard which in turns affects the
physiology of living organisms in the contaminated ecosystems.
Types Characteristics Uses Effects
Persistent Organic
Pollutants (POPs)
-highly stable organic
compounds
-accumulates in most fatty
tissues of living organisms
-semi volatile
-pesticides
-industrial use
-a half-life in water
greater than two months
-soil and sediment half-
lives greater than six
months-toxic characteristics, are
persistent, bio
accumulate, are prone to
long-range trans
boundary atmospheric
transport and deposition
Polychlorinated
Biphenyls (PCBs)
-forms clear to yellow, oily
liquids to white, crystalline
(sand like) solids and hard
resins
-change in original geographical
landscape
Used in insulating fluids
of electrical system
-irritates and burns the
eye
-irritate nose and throat
causing cough and
difficulty in breathing
-damage to reproductive
system
-acne-like skin rash
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-damage nervous system,
causing headache,
numbness weakness and
tingling in the arms and
legs
-liver damage
Volatile Organic
Compounds
(VOC)
-efficient evaporation of organic
compounds
-low molecular mass of
compound
made up of hydrocarbons,
aldehydes, ketones andsolvents
-transfer easily through air, landand water
Used in household
products: paints, paint
strippers and other
solvents, wood
preservatives, aerosol
sprays, cleansers,disinfectants, moth
repellents, air refreshers,stored fuels and
automotive products,
hobby supplies and dry
cleaning clothing
-eye, nose and throat
irritation
-headache
-loss of coordination
-nausea
-damage to liver, kidneyand central nervous
systems-carcinogenic and causes
cancer in animals
PersistentBioaccumulative
Toxic Pollutants
(PBTs)
-non-biodegradable-highly toxic
ability to travel long distances
-transfer easily through air,
water and land
-target organs: central nervous
systems, reproductive organs,
chromosomes
-Aldrin/DieldrinInsecticide and
byproduct of pesticide
Aldrin
-Benzo(a)pyrene
Byproducts of
incomplete combustion
-Chlordane
Pesticide and fumigating
agent-DDT
Pesticide-Hexaclhorobenzene
-Pesticide-Fungicide
-Fireworks and
amunition
-Mirex
-Insecticides
-control chemical for
fire ants-Octachlorostyrene
Graphite anodes are
used during electrolytic
production of
magnesium frommagnesium chloride
-Dioxins and furans
Trace level unintentional
byproducts of most
forms of combustions
and industrial chemical
processes
-Toxaphene
Insecticides
-decrease effectiveness ofimmune system
-increase infant mortality
-reduces reproductive
success
-cause cancer and birth
defects
-damages to kidney
-skin disorders in humans
and animal-harmful developmental
and reproductive effects
-behavioral disorders in
children if they wereexposed before birth or
while nursing
-harms the endocrine,
nervous, digestive andliver systems
-damages bones, kidneys
and blood cells
-abnormal fetal
development
-harmful effects on
stomach, intestines, eyes
and thyroid glands
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Heavy Metals
Heavy metal readily accumulates through food web from producer to consumer. As it
exceeds the maximum health standard level, it can be immediately poisonous or result in
long-term health problems.
Types Characteristics Uses Effects
Lead (Pb) -metallic and cubic close-
packed
-soft bluish white metal-non combustible solid (except
as dust)
-routes of exposure: inhalation,
ingestion, skin and/or eye
contact
-target organs: gastrointestinal
tract, central nervous system,
kidneys, blood and gingivaltissue
-protective shield from
radioactivity
-lead acid accumulator-manufacture antiknock,
tetraethyl lead
Pb(C2H5)4 in petrol
-pigments e.g., white basic
lead
carbonate,Pb(OH)2 orange
pigment red lead, Pb3O4
-Mental retardation
among children exposed
to lead in waterresulting from lead
pipes and solders
in older water systems
-exhibit weakness,
general disability,
nervous disorders and
eventual death
Mercury (Hg) -silver coloured liquid
transition metal
-non-combustible liquid
-routes of exposure: inhalation,skin absorption, ingestion,skin and/or eye contact
-target organs: eyes, skin,
respiratory system, central
nervous system, kidneys
-electrodes in the
amalgamation of
electrolysis of brine
-thermometers-barometers-fluorescent lamps
-carcinogenic, typically
cause cancer or are
mutagenic
-cause for kidneydamage
-cause for neurological
disorder
-cause for blindness
-associated with birth
defects
-damaging to aquatic
life
Arsenic (As) -metalloid and gray brittle non-
metal flake
-routes of exposure: inhalation,
ingestion, skin and/or eyecontact.
-target organs: skin, respiratory
system, kidneys, centralnervous system, liver,
gastrointestinal tract,
reproductive system
-deadly poison in shotgun
pellets
-metal for mirrors
-glass-lasers
-light emitting diodes
(LED)-semiconductors
-carcinogenic
-associated with lung
cancer
-results in skin cancer-damage to intestines
and liver, as it is found
in pesticides, woodpreservatives and
naturally occurring in
many household
products
-toxic when ingested
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Cadmium (Cd) -silvery white transition metal
-non-combustible solid (except
as dust)
-route of exposure: inhalation,
ingestion
target organs: respiratory
system, kidneys, blood,prostate
-nickel-cadmium batteries
-nuclear reactor regulator
-red/yellow pigments
-toxic and poisonous
Impacts
Economical effects
In the course of development, many basis for sustainable development is often ignored.In the aim for environmental management, private investors often opting for lowest risk
with highest profit takings in its ventures are ignorance to thorough plans, analysis and
assessments on environmental impacts done.
Even if such assessments are taken into account and cautious measures implemented,pollutions are still happening rapidly as each nations would not want to be left out in the
race for globalization, and also inevitable as pollution has been happening for a long
time.
Continuous development for globalization due to increasing activity of agriculture,
industrialization, fisheries, timber and mining will lead to:
rapid and excessive constructions of factories and building
increase in emissions of toxic and poisonous gases
destruction of ecosystems
And finally they will lead to permanent and irreversible damage to the environment.
In the events of pollution occurs which are reversible, greater finance and grants are
needed for the following purposes:
conservation of remaining ecosystem
rehabilitation contaminated ecosystems clean up of toxic waste
restoration of historical landscapes
revival of biodiversity to a new ecosystem preservation of endangered species
Biodiversity and diseases
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Biodiversity Degradation
Disturbances to biotic factors (temperature, light, water, humidity, wind, air currents, pH,
topography, etc.) and abiotic factors (predation, competition, habitat, pollination andmimicry - resemblance between animals and part of a plant/species happens to be
unpalatable to a predator) will lead to environmental resistance.
This is due to:
shortage of food, water and oxygen
low light intensity
predators and parasites
destruction of habitat
diseases
accumulation of toxic waste
psychological factors
harsh climate
And will lead to exponential decrease in population of ecosystems that will cause highextinction rate of biodiversity. If this condition is severe, the ecology of the ecosystems
will be permanently damaged.
Emergence of variant diseases
A combination of the following happenings:
Unhygienic practices by
individualsPoor sanitation of habitation
Uncontrollable
emission/release ofparticulates containing
pathogenic
microorganism/pollutants
Mismanagement of treatment, control and storageplants in containment of pollutants
Deterioration of machineries and facilities oftreatment, control and storage plants
will result in...
Exposure of contaminants to the
environment
|
Accumulation of poisonous
/hazardoussubstance incorporated into
the physiological functions & systems
of every living organisms ,
including microorganisms like bacteria
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|
Harmless microorganisms due to
evolution undergoes rapid mutation of
deleterious genes into pathogenic /
viral microorganisms
|
Diversifications with the existence of
superclasses of microorganisms
(super virus) which are aggressive &
invasive against the protective
immunities provided by the immune
systems in organisms
|
More powerful & larger doses of
medications, ranging from vaccines toantibiotics produced to battle &
immunize against strongerpathogen attack
|
Strong medication may produce side
effects & harmful to physiological
functions/systems of organisms
Climatic pattern change
A combination of the following happenings:
Rapid emission of greenhouse gases from mass utilization of transportation &
heavy industrial economic activities
Clearing of land leaving an exposed idle barren land
Chemical composition of atmosphere altered
Natural disasters of frequent volcanic eruptions
will result in...
pH, light intensity, wind speed and
globe temperature distorted
|
Change in wind direction cause for
alteration in the world's seasonal
climates
|
Concentration of the extremes of
temperatures could cause a build up of
air and ocean currents
|
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Allocation and shift of these currents to
different continents from its original
location
|
Activities are rapid and instantaneous,
which can leave lots of damages and
lost of lives
|
Corrosive to land surfaces and
mountain ice-capped which can lead to
erosions and melting of ice cap due to
distortion from climate pattern
..and will finally cause
Global warming
El Nino & La Nina
Alteration to geographical landscapes
A combination of the following happenings:
Constructions of housing and industries for development
Economical activities of mining, timber and agriculture
Clearing of rainforest and hillside, with natural disasters like earthquake which
involves the shifting of earth surface
will result in...
Alteration to chemical composition of
soil by substitution, utilization and
drainage
|
Increase in soil temperature produces
warming
|
Soil fertility decreases which gradually
turns to a barren land due to
desertification
|
Soil stability and grip which acts as
foundation decrease
|
Displacement of upper layer of soil due
to external forces of nature becomes
easier
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|
Original geographical landscape is
significantly altered
|
Visibility of atmosphere decrease
..and will finally cause
Deforestation
Desertification
Erosion
Landslide
Food contamination and food web distortion
Food contamination leading to food shortage
A combined event of (a) free flow and emission of non biodegradable industrialdischarge and noise disturbances due to usage of heavy machineries; (b) illegal dumping
and spraying of toxic and hazardous chemicals on land and water; and (c)
mismanagement in regulation of treatment and control of heat and radioactive substances;will lead to high density toxicity concentration on soil, water and air. The impacts of this
are:
1. Fertile land becoming poisonous for living organisms underground and
agriculture practice, nutrients lost, locked up or becomes toxic2. Aquatic ecosystem depletes further and non-consumable water supplies noxious
fumes and gas permeates, blanketing atmosphere
3. Detrimental health to psychological and physiological being of organisms inecosystems
This situation continues to the rise of mortality rate of domesticated animals, failure of
reproduction, deterioration on performance of superior breed, and failure of cultivation of
crops which are inedible. This is also due to rapid mutation of deleterious genes;deterioration on metabolic and physiology functions of systems in plants and animals.
Finally, as a result, there will be low productivity of food population; occurrence of
starvation and dehydration, and if severe, exponential increase in mortality rate of florasand faunas worldwide.
Food web distortion
A combination of (a) mass viral infections and attacks on certain organisms; (b)
contamination and pollution of food supplies which is inedible; and (c) uncontrollable
hunting of exotic/rare/endangered species will lead to the disequilibria of speciespopulation. The next impact will be the imbalance in the ration of producers, consumers
and decomposers in the ecology system, which consequently distorts the pattern of
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energy flow through the chain/web. This will bring to disruption of ecological food
pyramid.
When ecological food pyramid is disrupted, insufficient consumption of food causeorganisms deprived of energy, thus affecting the organism's metabolism of its
biochemical activities. Then, growth and development of organisms will be affected, andleads to mass starvation and mortality in world population. On the other hand, particular
species extinction occurred while its predators dominates, thus ecological niche inecosystems change.
Ozone depletion and acid rain
Ozone depletion
Ozone layer is a protective layer in our atmosphere (O3, three oxygen atoms). It's about19 to 30 km in distance from the Earth surface. It plays an important role of blocking
ultraviolet (UV) rays that come from the sun, which, if there was no ozone layer ever,
cancer would dominate and even no life would be in this world! The concentration of thelayer is usually under 10 parts ozone per million. The ozone layer is made up by the
action of sunlight to oxygen, and the amount is stabled by the existence of nitrogen.
n today's trends there is a noticeable depletion of the ozone layer. It's popularly known
since 1970 that a substance called CFC (chlorofluorocarbon) is threatening the layer. Thissubstance is usually contained in refrigerators, coolants, and aerosol sprays. When we use
much of those things (which contain CFC), we are continually depleting our Earth's
ozone layer. However, most of the latest products today do not contain CFC anymore.Some other substances, like bromine halocarbons and nitrous oxides are also possible
threats.
The effects of ozone layer depletion are:
More ultraviolet rays come to Earth (this could make the Earth just like a cooking
oven) More heat, thus increasing the risk ofglobal warming.
How CFC depletes the ozone layer?
1. CFC molecule, consisting of one atom for each fluorine and carbon and 3 chlorine
atoms, is hit by the UV rays.2. One chlorine atom breaks apart. It will hit an ozone (O3) and takes one oxygen
atom away to create chlorine monoxide, thus leaving one oxygen molecule (O2).
3. Another oxygen atom breaks the chlorine monoxide and takes the oxygen atom
away, leaving one chlorine atom, leaving no ozone molecule. Process repeats.
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Acid rain
Acid rain is the kind of precipitation that contains larger amounts of acid than normal.
Rainwater is usually slightly acidic, with pH level between 5 and 6. Water that evaporatesfrom earth is neutral (pH 7) and it becomes weak acid when mixed with carbon dioxide in
the atmosphere. Acid rain contains more pH than ordinary. This is caused by the presenceof air pollutants, like sulfur dioxide and nitrogen oxides. They produce acids if combined
with water. Acid rain is considered as the wet deposits of air pollutants, where it'scombined with moisture before falling into the ground. While air pollutants that fall
without combining with moisture is called dry deposits.
Acid rain can occur naturally, from the volcanic eruptions. However we are also causing
this, from the emission of vehicles and of industrial plants that include the burning offossil fuels. If we continue to increase rate of air pollution, we are increasing the risk of
acid rain to happen.
What's the impact of acid rain?
Deteriorates building that is made of rock
Acidification of soil and lakes
Separation of poisonous minerals such as aluminum and mercury from the
surrounding ground, increasing the risk of contamination to lakes/water sources
Deteriorates trees and forests.
Actions to Control Pollution
Activities
Various programs are implemented for every levels of communities to participate andgive their support on the measures of conservation and sustaining environment initiated
by government and NGOs, in the assessment of risk and economical cost, grants and
financing, thereby maintaining cooperations and partnerships between internationalcommunities to reach a mutual objective in prevention of pollution and conservation of
environment worldwide.
Classifications Applications
Education
Imparting knowledge and value of significance of theenvironment is an important step to gain every
individual sense and consciousness the wealth of
biodiversity and ecology we have now
Environmental Physics
Documentaries Field Trips
Competitions
Parental Guidance
Environmental Clubs & Societies
Environmental-Based Games
Protocols and Conventions Montreal Protocol
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Implementations and adoption of protocols discussed
and exchange ideas and opinions by scientist,
environmentalist and leaders worldwide on themeasures on preventions, treatments and control, and
management on the global environmental state facing
every nations
Kyoto Protocol
Basel Convention
Secretariat to the Convention of
Migratory Species of Wild Animals
Regional Seas Conventions
Rotterdam PIC
Ozone Secretariat
Secretariat of the Convention on Biological
Diversity
Organizations
Governing and non governmental organizations
(NGOs) which are in charge of initiating the plans
and objectives of each societies to encourage public
participations on the sustainable management of
environment, and as a medium of communications
between the public and government concerning
environmental issues
World Wide Fund for Nature (WWF)
Wetlands International
United Nations Environment Program
(UNEP)
Environmental Protection Agency (EPA)
National Geographic Society
Discovery
Birdlife International
Environmental Ethics
In the philosophical upfront...
Let's think about what's written below:
Mankind is not everything, we are part of nature. Therefore respecting nature is
the same as respecting ourselves Nature is not provided only for mankind but for all living things
Mankind must play a good and honest role as a part of nature
Natural resources are limited, we have to preserve and save it for the future
Mankind as a part of nature must execute the responsibility to care for nature's
continual conservation, stability and beauty The use of natural resources must be as efficient as possible
To promote the use of recyclable materials
To keep maintaining environmental equilibrium
Governments at any level must manage the preservation of environment by
enforcing laws and regulations.
Laws and Regulations
Enforcement of law to ensure smooth implementation as passed by the Bill, and to act asdeterrent to others against the unscrupulous offenders committing such offences to bring
them to justice. As such, the laws stated are all derived from U.S. EPA (United States
Environmental Protection Agency), in which explanations of each laws are takenfrom the U.S. EPA's web site in summary
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National Environmental Policy Act of 1969 (NEPA) to
declare a national policy which will encourage productive and enjoyable harmonybetween man and his environment, to promote efforts which will prevent or eliminate
damage to the environment and biosphere and stimulate the health and welfare of man; to
enrich the understanding of the ecological systems and natural resources important to the
Nation; and to establish a Council on Environmental Quality.
The Clean Air Act (CAA)
o comprehensive Federal law that regulates air emissions from area,
stationary, and mobile sources
o to set and achieve NAAQS (National Ambient Air Quality Standards
authorized by U.S. Environmental Protection Agency) in every state by
1975. The setting of maximum pollutant standards was coupled withdirecting the states to develop state implementation plans (SIPs)
applicable to appropriate industrial sources in the state.
The Clean Water Act (CWA)
o set the basic structure for regulating discharges of pollutants to waters ofthe United States
o authority given to EPA to set effluent standards on an industry basis
(technology-based) and continued the requirements to set water qualitystandards for all contaminants in surface waters
o focused on toxic substances, authorized citizen suit provisions, and funded
sewage treatment plants (POTWs) under the Construction GrantsProgram.
Comperehensive Environmental Response, Compensation and Liability Act
(CERCLA or Superfund)
o created a tax on the chemical and petroleum industries and provided broad
Federal authority to respond directly to releases or threatened releases ofhazardous substances that may endanger public health or the environment
o established prohibitions and requirements concerning closed and
abandoned hazardous waste sites
o provided for liability of persons responsible for releases of hazardous
waste at these sites
o established a trust fund to provide cleanup when no responsible party
could be identified.
The Oil Pollution Act of 1990 (OPA)
o streamlined and strengthened EPA's ability to prevent and respond to
catastrophic oil spills
o requires oil storage facilities and vessels to submit to the Federalgovernment plans detailing how they will respond to large discharges
o requires the development of Area Contingency Plans to prepare and plan
for oil spill response on a regional scale
The Pollution Prevention Act (PPA)
o focused industry, government and public attention on reducing the amount
of pollution through cost-effective changes in production, operation, and
raw materials use
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o includes other practices that increase efficiency in the use of energy,
water, or other natural resources, and protect our resource base through
conservation. Practices include recycling, source reduction, andsustainable agriculture
The Resource Conservation and Recovery Act (RCRA)
o
control hazardous waste from the "cradle-to-grave." This includes thegeneration, transportation, treatment, storage, and disposal of hazardous
waste. RCRA also set forth a framework for the management of non-
hazardous wasteso address environmental problems that could result from underground tanks
storing petroleum and other hazardous substances
o focuses only on active and future facilities and does not address
abandoned or historical sites
The Safe Drinking Water Act (SDWA)
o to protect the quality of drinking water in the United States
o focuses on all waters actually or potentially designed for drinking use,
whether from above ground or underground sourceso to establish safe standards of purity and required all owners or operators of
public water systems to comply with primary (health-related) standards.
The Superfund Amendments and Reauthorization Act (SARA)
o stressed the importance of permanent remedies and innovative treatment
technologies in cleaning up hazardous waste sites
o required Superfund actions to consider the standards and requirements
found in other State and Federal environmental laws and regulations
o provided new enforcement authorities and settlement tools
o increased State involvement in every phase of the Superfund program
increased the focus on human health problems posed by hazardous waste
siteso encouraged greater citizen participation in making decisions on how sites
should be cleaned up
The Toxic Substances Control Act (TCSA)
o ability to track the 75,000 industrial chemicals currently produced or
imported into the United States
o repeatedly screens these chemicals and can require reporting or testing of
those that may pose an environmental or human-health hazard
o ban the manufacturing and importing of those chemicals that pose an
unreasonable risk
o mechanisms in place to track the thousands of new chemicals that industry
develops each year with either unknown or dangerous characteristics. Uranium Mill Tailings Radiation Control Act of 1978
o provides for the cleanup and disposal of mill tailings at abandoned sites
and the disposal of tailings at licensed sites after cessation of operations
o implemented by DOE, NRC, and some states through agreements with
NRC
o combination of active and passive controls to clean up contaminated
ground water as well as tailings that have been misused at off-site
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locations, and to dispose of tailings in a manner that will prevent misuse,
limit radon emissions, and protect ground water.
WIPP Land Withdrawal Act
o reviews and approves of the DOE's plans for testing and retrieving waste
at the WIPP
o
responsibility for implementing its radioactive waste disposal standardso helps ensure that the wastes will be disposed of in a manner that limits the
release of radioactive materials.
Research and developments (R&D)
Overview
In the field of advancing technology, improvisation of current method in the treatment
and control of pollutants in industrial areas, prevention of greater degree of pollution and
proper management of waste in hand with economical cost. Also in mind the practice ofsustainable development with the implementation of environmental technology to give a
greater benefit to every individuals. By classifications, research and development isdivided into:
Alternative Technologies
offering various possibilities to the current method in treatment and control of
pollution
current alternatives in applications:o soil vapor extraction
o bioventing
o biopileso land farming
o low temperature thermal desorption
o air sparging
o biosparging
o natural attenuation
o in situ ground water bioremediation
o dual-phase extraction
o desalination of sea water
many scientists think that the next step of generating nuclear energy is by fission
of atoms
Clean Technologies
renewable sources which can be used many times, involves minimal cost and alsorestricted use of hazardous materials in use, especially in the use of energy
current clean technologies available:
o hydropower
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o solar energy
o wind power
o geothermal energy
o biomass energy
o tillage
o vegetationo compost
Creative/Innovative Technologies
new class of invention which could lead to greater efficiency in prevention of
pollutions, or current improvement to a more refine technology
current creative/innovative technologies are:o sorbents
o air cleaning
o in situ oxidation
o in situ well aeration
o solvent extraction
o in situ flushing
o solidification
o soil washing
o biological agents
o dispersing agents
o energy chipso cooling towers
Perspectives of Pollution
The earliest precursor of pollution generated by life forms would have been a natural
function of their existence. The attendant consequences on viability and population levelsfell within the sphere ofnatural selection. These would have included the demise of a
population locally or ultimately, species extinction. Processes that were untenable would
have resulted in a new balance brought about by changes and adaptations. At the
extremes, for any form of life, consideration of pollution is superseded by that ofsurvival.
For humankind, the factor of technology is a distinguishing and critical consideration,
both as an enabler and an additional source of byproducts. Short of survival, humanconcerns include the range from quality of life to health hazards. Since science holds
experimental demonstration to be definitive, modern treatment of toxicity or
environmental harm involves defining a level at which an effect is observable. Common
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examples of fields where practical measurement is crucial include automobile emissions
control, industrial exposure (eg Occupational Safety and Health Administration (OSHA)
PELs), toxicology (eg LD50), and medicine (eg medication and radiation doses).
"The solution to pollution is dilution", is a dictum which summarizes a traditional
approach to pollution management whereby sufficiently diluted pollution is not harmful.It is well-suited to some other modern, locally-scoped applications such as laboratory
safety procedure and hazardous material release emergency management. But it assumesthat the dilutant is in virtually unlimited supply for the application or that resulting
dilutions are acceptable in all cases.
Such simple treatment for environmental pollution on a wider scale might have had
greater merit in earlier centuries when physical survival was often the highest imperative,human population and densities were lower, technologies were simpler and their
byproducts more benign. But these are often no longer the case. Furthermore, advances
have enabled measurement of concentrations not possible before. The use of statistical
methods in evaluating outcomes has given currency to the principle of probable harm incases where assessment is warranted but resorting to deterministic models is impractical
or unfeasible. In addition, consideration of the environment beyond direct impact onhuman beings has gained prominence.
Yet in the absence of a superseding principle, this older approach predominates practices
throughout the world. It is the basis by which to gauge concentrations of effluent for legal
release, exceeding which penalties are assessed or restrictions applied. The regressivecases are those where a controlled level of release is too high or, if enforceable, is
neglected. Migration from pollution dilution to elimination in many cases is confronted
by challenging economical and technological barriers.
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Waste management
What is Waste ManagementWaste management is the collection, transport, processing, recycling or disposal, andmonitoring ofwaste materials. The term usually relates to materials produced by human
activity, and is generally undertaken to reduce their effect on health,
the environment oraesthetics. Waste management is also carried out torecoverresources from it. Waste management can involve solid, liquid, gaseous or
radioactive substances, with different methods and fields of expertise for each.
Waste management practices differ fordeveloped and developing nations,
forurban and rural areas, and forresidential and industrial producers. Management fornon-hazardous residential and institutional waste in metropolitan areas is usually the
responsibility oflocal government authorities, while management for non-hazardous
commercial and industrial waste is usually the responsibility of the generator.
Methods of Waste Management
Disposal methods
Landfill
Landfill operation in Hawaii.
Disposing of waste in a landfill involves burying the waste, and this remains a common
practice in most countries. Landfills were often established in abandoned or unusedquarries, mining voids orborrow pits. A properly-designed and well-managed landfill
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can be a hygienic and relatively inexpensive method of disposing of waste materials.
Older, poorly-designed or poorly-managed landfills can create a number of adverse
environmental impacts such as wind-blown litter, attraction ofvermin, and generation ofliquid leachate. Another common byproduct of landfills is gas (mostly composed of
methane and carbon dioxide), which is produced as organic waste breaks down
anaerobically. This gas can create odor problems, kill surface vegetation, and is agreenhouse gas.
A landfill compaction vehicle in action.
Design characteristics of a modern landfill include methods to contain leachate such as
clay or plastic lining material. Deposited waste is normally compacted to increase itsdensity and stability, and covered to prevent attracting vermin (such as mice orrats).
Many landfills also have landfill gas extraction systems installed to extract the landfill
gas. Gas is pumped out of the landfill using perforated pipes and flared off or burnt in agas engine to generate electricity.
Incineration
Spittelau Incineration plant in Vienna.
Incineration is a disposal method that involves combustion of waste material. Incineration
and other high temperature waste treatment systems are sometimes described as "thermal
treatment". Incinerators convert waste materials into heat, gas, steam, and ash.
Incineration is carried out both on a small scale by individuals and on a large scale by
industry. It is used to dispose of solid, liquid and gaseous waste. It is recognized as a
practical method of disposing of certain hazardous waste materials (such as biological
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medical waste). Incineration is a controversial method of waste disposal, due to issues
such as emission of gaseouspollutants.
Incineration is common in countries such as Japan where land is more scarce, as thesefacilities generally do not require as much area as landfills. Waste-to-energy (WtE) or
energy-from-waste (EfW) are broad terms for facilities that burn waste in a furnace orboiler to generate heat, steam and/or electricity. Combustion in an incinerator is not
always perfect and there have been concerns about micro-pollutants in gaseous emissionsfrom incinerator stacks. Particular concern has focused on some very persistent organics
such as dioxins which may be created within the incinerator and which may have serious
environmental consequences in the area immediately around the incinerator. On the otherhand this method produces heat that can be used as energy.
Recycling methods
PVC, LDPE, PP, and PS (see resin identification code) are also recyclable, although these
are not commonly collected. These items are usually composed of a single type ofmaterial, making them relatively easy to recycle into new products. The recycling of
complex products (such as computers and electronic equipment) is more difficult, due to
the additional dismantling and separation required.
Biological reprocessing
An active compost heap.
Waste materials that are organic in nature, such as plant material, food scraps, and paper
products, can be recycled using biological composting and digestion processes to
decompose the organic matter. The resulting organic material is then recycled as mulch
orcompost for agricultural or landscaping purposes. In addition, waste gas from theprocess (such as methane) can be captured and used for generating electricity. The
intention of biological processing in waste management is to control and accelerate thenatural process of decomposition of organic matter.
There are a large variety of composting and digestion methods and technologies varying
in complexity from simple home compost heaps, to industrial-scale enclosed-vessel
digestion of mixed domestic waste (see Mechanical biological treatment). Methods of
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biological decomposition are differentiated as being aerobic oranaerobic methods,
though hybrids of the two methods also exist.
An example of waste management through composting is the Green Bin Program inToronto, Canada, where household organic waste (such as kitchen scraps and plant
cuttings) are collected in a dedicated container and then composted.
Energy recovery
Anaerobic digestion component ofLbeckmechanicalbiological treatmentplant in Germany
The energy content of waste products can be harnessed directly by using them as a direct
combustion fuel, or indirectly by processing them into another type of fuel. Recyclingthrough thermal treatment ranges from using waste as a fuel source for cooking orheating, to fuel forboilers to generate steam and electricity in a turbine. Pyrolysis and
gasification are two related forms of thermal treatment where waste materials are heated
to high temperatures with limited oxygen availability. The process typically occurs in asealed vessel under highpressure. Pyrolysis of solid waste converts the material into
solid, liquid and gas products. The liquid and gas can be burnt to produce energy or
refined into other products. The solid residue (char) can be further refined into products
such as activated carbon. Gasification and advanced Plasma arc gasification are used toconvert organic materials directly into a synthetic gas (syngas) composed ofcarbon
monoxide and hydrogen. The gas is then burnt to produce electricity and steam.
Avoidance and reduction methods
An important method of waste management is the prevention of waste material beingcreated, also known as waste reduction. Methods of avoidance include reuse of second-
hand products, repairing broken items instead of buying new, designing products to be
refillable or reusable (such as cotton instead of plastic shopping bags), encouragingconsumers to avoid using disposable products (such as disposable cutlery), removing any
food/liquid remains from cans, packaging, ... and designing products that use less
material to achieve the same purpose (for example, lightweighting of beverage cans).
Waste handling and transport
A typical front loading garbage truck in North America.
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Waste collection methods vary widely between different countries and regions. Domestic
waste collection services are often provided by local government authorities, or by
private industry. Some areas, especially those in less developed countries, do not have aformal waste-collection system. Examples of waste handling systems include:
In Australia, curbside collection is the method of disposal of waste. Every urbandomestic household is provided with three bins: one for recyclables, another for
general waste and another for garden materials - this bin is provided by themunicipality if requested. Also, many households have compost bins; but this is
not provided by the municipality. To encourage recycling, municipalities provide
large recycle bins, which are larger than general waste bins. Municipal,commercial and industrial, construction and demolition waste is dumped at
landfills and some is recycled. Household waste is segregated: recyclables sorted
and made into new products, and general waste is dumped in landfill areas.According to the ABS, the recycling rate is high and is 'increasing, with 99% of
households reporting that they had recycled or reused some of their waste within
the past year (2003 survey), up from 85% in 1992'. This suggests that Australiansare in favour of reduced or no landfilling and the recycling of waste. Of the totalwaste produced in 200203, '30% of municipal waste, 44% of commercial and
industrial waste and 57% of construction and demolition waste' was recycled.
Energy is produced from waste as well: some landfill gas is captured for fuel orelectricity generation. Households and industries are not charged for the volume
of waste they produce.
In Europe and a few other places around the world, a few communities use a
proprietary collection system known as Envac, which conveys refuse viaunderground conduits using a vacuum system.
In Canadianurban centrescurbside collection is the most common method ofdisposal, whereby the city collects waste and/or recyclables and/or organics on ascheduled basis. In rural areas people often dispose of their waste by hauling it to
a transfer station. Waste collected is then transported to a regional landfill.
In Taipei the city government charges its households and industries for thevolume of rubbish they produce. Waste will only be collected by the city council
if waste is disposed in government issued rubbish bags. This policy has
successfully reduced the amount of waste the city produces and increased the
recycling rate.
Technologies
Traditionally the waste Management industry has been slow to adopt new technologies
such as RFID tags, GPS and integrated software packages which enable better quality
data to be collected without the use of estimation or manual data entry.
Technologies like RFID tags are now being used to collect data on presentation
rates for curb-side pick-ups which is useful when examining the usage of
recycling bins or similar.
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