hydrosphere

hydrosphere - eutrophication - increasing amount of...

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seawater  - contains 97.2% of world's water, aka saline water   salinity - grams of salts per 1 kg of seawater salt, bromine, magnesium commercially extracted from seas desalination - removing salts from seawater o distillation - makes the salts precipitate out o reverse osmosis - extra pressure >> solvent goes towards more dilute side freshwater  - amount of oxygen = quality of water   9 ppm of oxygen in fully saturated water aerobic bacteria uses oxygen to oxidize biodegradable materials o excess biodegradable materials >> bacteria uses up more oxygen for oxidation o not enough oxygen >> aerobic bacteria dies >> anaerobic bacteria take over
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Unformatted text preview: eutrophication - increasing amount of dead/decaying plant matter green chemistry - using chemical products that preserve the environment preventing waste > cleaning up waste industries need as little waste as possible, waste shouldn't be toxic chemical processes need to be energy-efficient raw materials should be renewable no auxiliary substances used (or at the very least, harmless auxiliary substances) o solvents not consumed in reaction but released into atmosphere water purification - water chlorination produces trihalomethanes (THM) several THMs are carcinogens...
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This document was uploaded on 10/30/2011 for the course CHEM 161 at Rutgers.

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