Chapter 11 Water Pollution Flashcards Preview

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Flashcards in Chapter 11 Water Pollution Deck (23)
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1

What is point source?

“any single identifiable source of pollution from which pollutants are discharged, such as a pipe, ditch, ship or factory smokestack” Factories and sewage treatment plants are two common types of point sources.

2

What is a non-point source?

comes from areas such as farmlands where chemical are used, drain into ground or surface water, other sources are pastures, barnyards, construction sites, homes, streets, lawns.

3

the increase in concentration of a chemical substance in a food web as it passes from lower levels to highest levels.

Biomagnification

4

Point Source
Easier to identify
Nonpoint Source
Growing threat

Source type

5

Sediment
Inorganic nutrients
Thermal pollution
Disease-producing organisms
Toxic organic chemicals
Heavy metals
Oxygen-demanding organic wastes

Chemical Pollution

6

Construction
Agriculture
Impacts
Blocks light
Buries nooks & shelters
Scours organisms
Interferes with navigation
Damages hydro dams

Sediment

7

Nitrates and phosphates
Accelerated eutrophication
Causes
Agriculture
Domestic sewage
Groundwater impact

Inorganic Nutrients

8

Source
Industrial cooling
Impacts
Reproduction
Disease
Direct Mortality
Destructive Organisms
Benefits

Thermal Pollution

9

Common microorganisms
Coliform
Fecal strep
Pfiesteria
Purification
Sewage treatment

Disease-Producing Organisms

10

Persistent
BPA (plasticizer), DDT, PCB
Landfills
Septic tanks
Fuel storage tanks
Contaminated sites
Superfund
Injection wells

Toxic Organic Compounds

11

Sewage
Dredge spoils
Plastics
Oil Pollution

Pollution of Oceans

12

the nutrient enrichment of aquatic ecosystems, occurs naturally as a lake or river ages over long periods

eutrophication

13

characterized by moderate levels of nutrients, lakes good for fishing boating swimming

mesotrophic

14

clear lake waters surrounded by pine snd spruce forest clear because of scarcity of suspended algae resulting from the low levels of nutrients

oligotrophic lake

15

Established the basic structure for regulating pollutant discharges into the waters of the United States. Gave EPA the authority to implement pollution control programs such as setting wastewater standards for industry

water pollution control act 1972

16

federal law that regulates the discharge of pollutants into the nation's surface waters, including lakes, rivers, streams, wetlands, and coastal areas. Passed in 1972 and amended in 1977 and 1987, originally known as the Federal Water Pollution Control Act.

Clean Water Act 1977

17

was established to protect the quality of drinking water in the U.S. This law focuses on all waters actually or potentially designed for drinking use, whether from above ground or underground sources

Safe Drinking Water Act 1974

18

types of sewage treatment and disposal

treatment plants
storm drains
septic tanks

19

treatment plant that physically removes solids from the wastewater

primary treatment plant

20

rely on aerobic bacteria to break down degradable organic materials- activated sludge process, trickling filter

secondary treatment plant

21

most advanced form of water treatment designed to remove most of the remaining pollutants notably the nitrates and phopshates

tertiary treatment plant

22

heavy metal pollutatnts

lead
mercury
cadmium

23

pollutant that is broken down by the naturally occurring microorganisms that consume dissolved oxygen lowering the level of oxygen

oxygen demanding organic waste