Water Facts: ______ of the Earth is covered by water but only ________ is _____________________water...
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Transcript of Water Facts: ______ of the Earth is covered by water but only ________ is _____________________water...
Water Facts:______ of the Earth is
covered by water but only ________ is _____________________water
One litre of _______________ pollutes about ______ litres of freshwater
It’s estimated that there is _____________________ of freshwater worldwide
How is polluted water cleaned?Not easy to reverse the effects of water pollution
It can be very expensive tooThere are 2 common ways to fix pollution…what would they be??________________________________________________________________
Removing the source:Depends on the _____________________________ of
pollutionCould be from one of __________ source types:
_______________________The exact place where pollution occurs can be
identified_______________________
The exact place where pollution occurs cannot be identified but the region can be identified
_______________________This type of pollution occurs across
governmental boundariesWhich types of pollution can you identify from the
picture on the previous slide?
Why not remove the source all of the time?
If removing the source of the pollution gets rid of it… why not do it all of the time??_____________________________________
_____________Others?
Removing the contaminants:This is the second way to clean up
water pollution - _______________techniques are used
Can be used individually or in combination
Most involve ________________________, _________ the water, and then pumping it _________________________
Air Stripping:Uses ____to remove contaminants that
_________________________Polluted water is ______________into a
tank and then __________ over packing material
Water ___________through the packingmaterial and a _________over the water to help it evaporate
_________ collected at the top of the tank are treated to prevent further pollution
Activated Carbon Filtration:Polluted water is sent
through _______________ _______________________
Chemicals stick to the surface & pores of the ___________________ and clean water flows through
Filters are ___________ or _______________when they are full
Bioremediation:Uses naturally occurring
_____________________ to digest contaminantsContaminants are converted to
_____________________ such ascarbon dioxide
Often used in ________________treatment plants in cities and can be used for ______________
Phytoremediation:________________ are used
to remove pollutantsThe ______of the plant
take up the contaminants at the same time as ____________________
Contaminants are ________ in the roots and leaves
Chemical Oxidation:_____________ are used to convert
chemicals into _________________________chemicals
_____ are drilled into the ___________source & the oxidants are pumped in
Contaminants are removed ____________and are treated and easily disposed of