geology_30 - Chapter 12: Water Pollution cont. Toxic waste...

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Chapter 12: Water Pollution cont. Toxic waste cont. Heavy Metals: Pb, Hg, Zn, Cd – often deposited at the bottom of stream channels If deposited in floodplains will be incorporated into plants, crops and animals Examples: Mercury contamination of aquatic ecosystems; sourced: from volcanoes and erosion of natural mercury deposits Burning coal, incinerating waste, processing metals Lead to e.g., lead or mercury contamination Radioactive materials Sediment pollution: Sand and smaller particles Polluted streams, lakes, reservoirs, even ocean water Major sources: Soil erosion, dust storms, floods, and mudflows Greatest pollutant by volume Thermal pollution: Artificial heating of waters, primarily by hot-water emission from industrial operations and power plants. Major sources: Hot-water discharge from industrial operations, power plants, abnormal ocean currents Heated water causes several problems : Heated water contains less O than cold water
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This note was uploaded on 04/08/2011 for the course GEOL 2001 taught by Professor Babaie during the Winter '09 term at University of Georgia Athens.

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geology_30 - Chapter 12: Water Pollution cont. Toxic waste...

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