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Water Pollution & Treatment

Water Pollution & Treatment. Science 8 Chapter 2C NCSCOS 3.07. Warm-Up : copy each sentence with the correct response. The 3 classes of indicators are ____, biological, and chemical. Nitrates from fertilizers found in a water supply are _________.

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Water Pollution & Treatment

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  1. Water Pollution & Treatment Science 8 Chapter 2C NCSCOS 3.07

  2. Warm-Up: copy each sentence with the correct response. • The 3 classes of indicators are ____, biological, and chemical. • Nitrates from fertilizers found in a water supply are _________. • The dirtiness or cloudiness of water is ______. • pH is a method of measuring the _____ of water. • An living organism that is used to evaluate water health is a _______. • ______ can form in turbid water or in the presence of nitrates. • A _____ is an area of land that shares the same water. • Bio- indicator • Physical • Watershed • Algal Blooms • Chemical indicators • Acidity • Turbidity

  3. What is Pollution? A pollutantis any substance or form of energy that can cause harm to the environment and make it unfit for organisms. Two types of water pollution: • Point Source • Non-Point Source

  4. Water Pollution Sources • Point Source- you know the one source of pollution; it is identified; easier to detect and control • Non-point Source- comes from many sources that can not be easily identified; harder to control

  5. Point-Source examples: • Pipe from Sewage Plant • Pipe from Industrial Factory

  6. Point-Source examples:

  7. Point-Source examples: • Oil Tanker Spill

  8. Non-Point Source examples: • RUNOFF!!! • Water comes from across a large, more diffuse area of land • From…farms, lawns, parking lots, streets, construction sites, acid rain from air pollution, etc.

  9. Non-Point Source examples:

  10. Non-Point Source examples:

  11. Non-Point Source examples:

  12. Non-Point Source examples:

  13. Biomagnification/Bioaccumulation • Pollution gets into smaller organisms • Amount builds up as it gets passed up food chain • Chemicals could end up in food eaten by humans

  14. North Carolina Pollution • Sedimentation – increases turbidity • Erosion • Development • Agriculture – tilling soil, irrigation, livestock • Nutrient Pollution – increases Nitrate & Phosphate levels in water •  Algae Low Oxygen • Fertilizers run off in storm water • Fecal Coliform Bacteria from animal feces

  15. Water Treatment • Sewage Treatment Plants • Process raw waste & get water ready to enter back into rivers • 1.) Sludge separated, chlorine used to kill harmful bacteria • 2.) Oxygen & sludge-eating bacteria used • Septic Systems • Small wastewater system used by home or business in rural area • Sludge consumed by bacteria • Cleaner water exits & spreads into ground

  16. Septic System

  17. Water Treatment • Drinking Water Treatment Plants: • 1. Water piped in from river or lake • 2. Flows through mixers, clumping agents & chemical disinfectants added • 3. Clarifying pool separates large particles • 4. Filters separate tiny particles of dust & dirt • 5. Chlorine used to kill bacteria • 6. Clean water goes to water storage tank

  18. EPA • The Environmental Protection Agency sets and enforces water quality standards for wastewater, pollution & drinking water. • Focuses on protection of surface freshwater resources

  19. What can we do to help?! • Pick up pet waste • Pick up litter • Plant vegetation • Dispose of chemicals & wastewater appropriately • Reduce amount of water used

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