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Water Pollution and Treatment
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What type of water pollution is the largest contributor to ocean dead zones?
Plant Nutrients
What are some optional last steps in water treatment?
Aeration, PH adjustment, Fluoridation
What is the 5th step in the water treatment process? What is the purpose of it?
Post Chlorination - chlorine levels are adjusted, water is disinfected (chlorine, ozone, or uv light)
What is the fourth step in the water treatment process?
Sand filtration
What is the third step in the water treatment process?
Settling
What is the second step in the water treatment process? What does it do?
Flocculation - removal of bacteria and impurities (by way of binding them to flocs that settle to bottom of tank)
What is the first step in water treatment? What does it do?
Screening - removes large objects
What is the source of pollution called when you cannot specifically locate where it is coming from?
Non - Point Source
What is the source of pollution called when you can specifically locate where it is coming from?
Point Source
What is the largest source of water pollution?
Agriculture
What type of water pollution comes mostly from power plants?
Heat Pollution or radioactivity
What type of water pollution comes from soils and silts from land erosion?
Sediment
What type of pollution comes from water soluble nitrates, ammonia and phosphates. They are often from sewage, agriculture, and urban fertilizers.
Plant Nutrients
What type of water pollution comes from oil, gasoline, plastics, detergents, often from surface runoff, industries, and cleaners?
Organic Chemicals
What type of water pollution comes from acids and toxic chemicals often from runoff, industries, and household cleaners?
Inorganic Chemicals
What type of water pollution comes from organic waste that needs oxygen. This often comes from animal waste, paper mills, and food processing.
Oxygen Demanding Wastes
What type of water pollution comes from bacteria & viruses often from animal and human waste?
Infectious Agents


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