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Water Purification & Pollution

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Water Purification & Pollution - PowerPoint PPT Presentation

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Water Purification & Pollution

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  1. Water Purification & Pollution

  2. How Water Treatment Workshttps://www.youtube.com/watch?v=tuYB8nMFxQA

  3. During our lab, what 4 steps in the water treatment process did we use? • Aeration • Coagulation • Sedimentation • Filtration

  4. Aeration • Gas bubbles escape • Oxygen is added

  5. Coagulation • Alum is added –sticks to solid particles so that they clump together and separate from water • “floc”

  6. Sedimentation • Gravity pulls the floc to the bottom in settling basins

  7. Filtration • Remaining water is filtered through sand, pebbles

  8. What is the 5th step? • Adding disinfectants to water to purify it and kill any organisms

  9. How long does cardboard take to break down? • 2 weeks

  10. How long does it take photodegradable packaging to break down? • 6 weeks

  11. How long does it take newspaper to break down? • 6 weeks

  12. How long does it take styrofoam to break down? • 80 years

  13. How long does it take for aluminum to break down? • 200 years

  14. How long does it take plastic packaging to break down? • 400 years

  15. How long does it take glass to break down? • Takes so long that we do not know fully

  16. CHALLENGE WATER POLLUTION SCENARIOS: How do these activities lead to water pollution? 6th Grade

  17. Allowing Animals to graze directly next to a stream

  18. 1) Wastes pass disease-carrying bacteria • 2) prevents soil from eroding, so that water does not travel faster and further • 2) Loss of riparian vegetation • Plantlife that exists along a waterway • Benefit: absorb pollutants before they exit downstream

  19. Fields left empty after harvesting crops

  20. 1) soil is looser, filled with fertilizers and pesticides, so it erodes more quickly, carrying them further

  21. PowerPlants returning water that is not polluted into a river after using it to cool down machines

  22. Warm water(even if not polluted) causes many organisms to die

  23. Having fun on a motorboat with friends

  24. *Oil and gas to keep it moving • Harms wildlife • Hard to get out of water *Litter can easily get into the water (marine dumping)

  25. Driving a car down a highway

  26. Oil and gas spills  road is impermeable, surface runoff carries it to nearby ponds/lakes/rivers • Litter

  27. Putting salt on the road after a snow day to make it less slippery

  28. Rain carries salt to freshwater sources • Can change the LAKE TURNOVER process • Damages plants

  29. Using cleaning products labeled “environmentally friendly” and “biodegradable”

  30. Remove oxygen from the water

  31. Using laundry detergents with phosphates in them

  32. Phosphates are food to algae • Cause Eutrophication

  33. Mercury is emitted into the air by burning coal for fuel

  34. Atmospheric Deposition: pollutes air, creating acid rain • mercury poisoning