energy sources, pollutants, reduction of air pollutants, sewage treatment, population diagrams Flashcards

1
Q
  • supports protection and propagation of fish, shellfish, and wildlife and recreation in and on water
  • focuses on protecting/restoring chemical, physical, biological properties of surface waters
  • permitting system to keep point sources of water pollutants (factories, feedlots, wastewater treatment plants) from discharging above acceptable levels
  • established acceptable concentration on different pollutants
A

clean water act

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2
Q
  • EPA must set MCLs (max contaminant levels) for 77 different pollutants in both surface and groundwater
    ex. arsenic, mercury, benzene
A

safe drinking water act

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3
Q

identified 6 key criteria primary pollutants that the EPA must set, monitor, and enforce emission levels for:
- SOx,
- NOx
- PM
- Pb
- CO
- O3

A

clean air act

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4
Q
  • allows epa to set list of hazardous wastes and requires industry to monitor and dispose of hazardous waste properly
  • requires landfills to have a RCRA permit and may require more secure landfill cap or leachate collection system
A

resource conservation and recovery act

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5
Q
  • tax on highly polluting industries ex. petroleum and chemical
  • funds from tax go to cleaning up old hazardous waste sites (mines, chemical plants, oil refineries)
A

Comprehensive Environmental Response, Compensation, and Liability Act

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6
Q
  • prohibits FDA from approving any food additive found to be carcinogenic in humans or animals
  • allows “generally recognized as safe” chemical additives in food
A

Delaney clause of food, drug, and cosmetic act

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7
Q
  • international agreement signed by 197 countries agreeing to phase out ozone depleting CFCs
  • called for IMMEDIATE transition to HCFCs
  • called for HCFC phase out by 2020 in developed countries and transition to HFC
  • HIGHLY successful in phasing out 98% of ozone depleting chemicals within 25 years of ratification
A

Montreal Protocol

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8
Q
  • international agreement between 193 countries in 1997 to reduce GHG emissions by ~5% below 90 level by 2012
  • developing countries had no emissions reduction targets
  • never ratified in us
  • had not successfully reduced GHG emissions
A

Kyoto Protocol

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9
Q
  • gives USFWS power to list species as endangered/threatened
  • prohibit harm/trade of these species
  • purchase land critical to protecting habitat for endangered species
  • created recovery plans to increase population sizes of endangered species
A

Endangered Species Act

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10
Q
  • international agreement signed by 184 countries
  • aims to prevent the international trade of over 35000 endangered species
  • Countries may seize illegal wildlife and fine violators
  • endangered species act in us incorporates implementation of CITES
A

Convention on the International Trade of Endangered Species (CITES)

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11
Q
  • physical removal of large debris (TP, leaves, plastic, sediment) with screen or grate)
A

primary treatment

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12
Q
  • biological breakdown of organic matter aka feces with bacteria
  • aerobic pressure with 02
    aeration tank filled with bacteria
  • break down organic matter into co2 and things like nitrogen and phosphorous
A

secondary treatment

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13
Q
  • chemical filter system
  • chemical treatment to reduce pollutants (nitrate, phosphate, ammonia)
  • expensive
  • reduces nitrate and phosphorous pollution which creates eutrophication which leads to dead zones
A

tertiary treatment

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14
Q
  • UV light, ozone, or chlorine used to kill bacteria or other pathogens ex. e coli
A

disinfectant

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15
Q
  • liquid waste (sewage) discharged into a surface body of water, typically from a wastewater treatment plant
A

effluent

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16
Q

inorganic solid waste collected at the bottom then spun and pumped to concentrate it further
- leftover dry waste is collected and burned or turned into fertilizer pellets or put in a landfill

A

sludge

17
Q
  • drive less, walk/bike/bus more
  • consume electricity with smart appliances
  • eat more plants, less meat
  • renewable non pollution emitting energies (solar, wind, hydro)
A

reducing emissions

18
Q
A
19
Q
A
20
Q
A
21
Q
  • companies that reduce emissions well below EPA set levels earn pollution credits and they can sell these to companies that release more than acceptable levels
A

pollution credits

22
Q
  • capture hydrocarbon VOCs, released from gasoline fumes during refueling
  • reduces VOCs which contribute to smog and irritate respiratory tracts
  • also reduces benzene (carcinogen) released from gasoline vapors
A

vapor recovery nozzle

23
Q
  • required on all vehicles
  • contains metals that bind to NOx and CO
  • coverts NOx, CO, and other hydrocarbons into CO2, N2, O2, and H2O
A

catalytic converters

24
Q

crushed limestone reduces SO2, used to reduce SO2 from coal power plants
- crushed coal mixed with limestone (calcium carbonate) after being burned in boiler
- calcium carbonate in limestone combines with SO2 to produce calcium sulfate which reduces the SO2 being emitted
- calcium sulfate can be used to make gypsum wallboard

A
25
Q
  • fluidizing jets of air pumped into combustion”bed” which brings in more 02 making combustion more efficient
A

fluidized bed combustion

26
Q
  • NOx, SOx, VOCs
  • large column/tube/pipe filled with chemicals that absorb or neutralize acids (NOx, SOx, VOCs) from exhaust strain (emissions)
  • calcium oxide is a common dry scrubber additive which reacts with so2 to make calcium sulfate
A

dry scrubbers

27
Q
  • NOx, SOx, VOCs, PM
  • may involve chemical agents that absorb and neutralize NOx, SOx, VOCs but also include mist nozzles that trap PM in water droplets too
  • sludge collection system traps polluted water for disposal
A

wet scrubbers

28
Q
  • power plant/factory emissions passed through device with negatively charged electrodes giving particles a negative charge
  • negatively charged particles stick to positively charged collection plates, trapping them
A

electrostatic precipitator