Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of...
-
Upload
loren-oliver -
Category
Documents
-
view
214 -
download
1
Transcript of Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of...
![Page 1: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/1.jpg)
Water PollutionMercury
![Page 2: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/2.jpg)
Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and oceans.
D24
![Page 3: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/3.jpg)
I can explain why mercury pollution is a problem.
I can differentiate between bioaccumulation and biomagnification.
Learning Targets
![Page 4: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/4.jpg)
An element on the periodic table Metal in a liquid state Has many uses Has serious health effects when released
into the environment
What is Mercury?
![Page 5: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/5.jpg)
Natural Sources◦ Volcanoes◦ Natural mercury deposits◦ Release from the oceans
Human sources◦ Coal combustion◦ Waste incineration◦ Metal processing
Sources of Mercury
![Page 6: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/6.jpg)
How does mercury enter the food chain?
Mercury from power plants, waste incinerators, smelting plants and natural sources is released into the air.
These particles are released as rain drops, and deposited in soil or water.
These airborne particles can travel thousands of miles.
![Page 7: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/7.jpg)
Bacteria take in inorganic mercury and convert it to a different form called methyl-mercury◦ This form is more toxic and is harder for
organisms to eliminate The bacteria release the methyl-mercury,
where it enters the food chain by being absorbed by phytoplankton
![Page 8: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/8.jpg)
Fish
What organism is most likely to be contaminated with Hg?
![Page 9: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/9.jpg)
How are these fish becoming so contaminated when the
atmospheric levels of mercury are so low?
OrHow do fish in remote lakes
become contaminated?
![Page 10: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/10.jpg)
What does this mean?
This is the process by which organisms build up mercury in their bodies. They take in mercury more quickly than they can get rid of it.
Over time, the organism will accumulate mercury, until it can even reach toxic levels.
Mercury undergoes Bioaccumulation
![Page 11: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/11.jpg)
Mercury increases at each step in a food chain, because each organism takes the mercury from the organism that it eatswhich has taken in the mercury from the organisms that it ate …and so on … and so on
It also undergoes Biomagnification
![Page 12: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/12.jpg)
The highest levels of mercury are found at the highest levels of the food chain.
Bigger fish, older fish, and carnivorous fish will have the highest levels of mercury.
And, the mercury concentrates in the muscles of the fish, which is the part that humans eat
Biomagnification
![Page 13: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/13.jpg)
Mild cases have the following symptoms:◦ Reduction in motor skills◦ Dulled sense of touch, taste and sight
Pregnant women should avoid ingesting mercury at all costs, as unborn babies are very sensitive to mercury poisoning.
Mercury Poisoning in Humans
![Page 14: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/14.jpg)
Deterioration of the nervous system Impaired hearing, speech, vision Difficulty walking Tremors, or involuntary muscle movements Corrosion of skin and mucous membranes Difficulty with chewing and swallowing
Effects of more advanced mercury poisoning
![Page 15: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/15.jpg)
How Are Animals Affected?
Mercury can accumulate in fish and in the food chains that they are part of.
The effects that mercury has on animals are kidney damage, stomach disruption, damage to intestines, reproductive failure and DNA alteration.
![Page 16: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/16.jpg)
Human activities have doubled or tripled mercury levels.
This also is increasing by about 1.5% per year
Current levels of Mercury
![Page 17: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/17.jpg)
Reduced the amount of coal use
Take part in Hazardous Household Waste Disposal days
What can we do to help?
![Page 18: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/18.jpg)
Why is Hg pollution a problem? What is the difference between
bioaccumulation and biomagnification?
Learning Target Checkpoint
![Page 19: Mercury. Explain how the accumulation of mercury, phosphates and nitrates affects the quality of water and the organisms that live in rivers, lakes and.](https://reader030.fdocuments.us/reader030/viewer/2022032601/56649dd15503460f94ac7a8d/html5/thumbnails/19.jpg)
Krabbenhoft, D. P., & Rickert, D. A. (2008). Retrieved from U.S. Geological Survey website: http://pubs.usgs.gov/fs/1995/fs216-95
Reference