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Public Health

Public Health, water pollution, exam 2

1800 gallons of water used per day per person in USA
drinking, industrial, recreation, ablution 1800 gallons of water
ablution water used for cleaning & waste removal
Ganges River in India source of life for many people
surface water #1 source of drinking water & cooking
ground water #1 source of water (if include agriculture)
3000+ sites EPA recognizes priority clean up sites of illegal dumping of hazardous materials
Times Beach, MO spraying of roads w/dioxin
Times Beach, MO high levels of cancer
Love Canal, NY Hooker Company contanminated the water
1948-1975 800 million tons of DTT sprayed on US soil
DDT impacts calcium in bird egg shells
DDT linked to brain softing, hemmorraghes
DDT use banned in USA
USDA responsible for food inspection
FTC federal trade commission
ensures food safety FTC
alternate sources of energy solar, wind, bioenergy, hydropower, geothermal, hydrogen
#1 source of energy burning coal, oil, natural gas (fossil fuels)
aquifer-ogalala underground source of water
largest source of water, covering 10 central states aquifer-ogalala
snow caps source of water 2.225%
fresh water source of water 0.009%
rivers source of water 0.0001%
ocean source of water 97.134%
glaciers source of water 0.015%
saline lakes source of water 0.007%
atmospheric water source of water 0.01%
biological O2 demand all material in water that needs O2 in degeneration process
aeration removes taste, odor, iron & manganese rendered insoluble, removes dissolved gases CO2. oxygen adds freshness
coagulation, precipitation, flocculation removes chemicals, color, turbidity - aluminium sulfate
sedimentation removes turbidity, organisms, etc
filtration (sand bed) removes much junk, chemicals, etc microbes
softening renderswater more useable
hardness of water due to Ca++, Mg++ ions, Nazeolite is used, Ca & Mg removed, Na added
disinfection Na or K hypochlorite is used, kills microbes (inorganic)
absorption activated charcoal - odor & any taste is removed
corrosion correction bitumen (an inert tar coal product used to surface inside of iron pipes prevents T.B.)
uv light antimicrobial actin might one day replace chlorination
water testing basically revolves around E. coli identification
Created by: JYarger