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Air Pollution (continued)

Air Pollution (continued). Chapter 18 Ahrens Monday, 30 November Class #37. Review sheet for test #5. Ahrens Chapter 2, pages 34-41 Chapter 3, pages 66-70 and 78-82 Chapter 4, pages 103-105 Chapter 18, pages 502-525. Primary and secondary pollutants.

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Air Pollution (continued)

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  1. Air Pollution (continued) Chapter 18 Ahrens Monday, 30 November Class #37 Monday, November 30

  2. Review sheet for test #5 • Ahrens • Chapter 2, pages 34-41 • Chapter 3, pages 66-70 and 78-82 • Chapter 4, pages 103-105 • Chapter 18, pages 502-525 Monday, November 30

  3. Primary and secondary pollutants • Primary air pollutants enter the atmosphere directly from their sources • Examples are carbon monoxide and sulfur dioxide • Secondary air pollutants form only when a chemical reaction occurs with primary air pollutants • Examples are photochemical oxidants and acid deposition • Secondary air pollutants are more difficult to control Monday, November 30

  4. Santiago, Chile Monday, November 30 Fig. 18-CO, p. 500

  5. Monday, November 30 Table 18-1, p. 503

  6. Monday, November 30 Fig. 18-3a, p. 504

  7. Monday, November 30 Fig. 18-3b, p. 504

  8. Monday, November 30 Table 18-2, p. 513

  9. Monday, November 30 Fig. 18-10, p. 512

  10. Stepped Art Monday, November 30 Fig. 18-10, p. 512

  11. Monday, November 30 Table 18-3, p. 513

  12. Monday, November 30 Fig. 18-11, p. 514

  13. Monday, November 30 Fig. 18-12, p. 514

  14. A secondary pollutant: smog/photochemical oxidants/ozone • Smog originally meant smoke and fog • Now smog refers to the chemical soup created by sunlight acting on hydrocarbons (VOCs) and oxides of nitrogen in the presence of oxygen and sunlight • Ozone is the main constituent of smog, but there are many others, including PAN • Smog attacks the respiratory system Monday, November 30

  15. Monday, November 30 Fig. 18-6, p. 507

  16. Secondary air pollutant: acid deposition • Acid deposition: can be dry or acid rain, snow, fog, dew • Oxides of sulfur, oxides of nitrogen combine with water vapor or liquid water drops in the air • Sulfuric acid, nitric acid form • Acid attacks structures and plants • In bodies of water, acid allows heavy metals to leach out and contaminate water supplies, toxify water for fish and other living things Monday, November 30

  17. Monday, November 30 Fig. 18-21, p. 524

  18. Monday, November 30 Fig. 18-22, p. 524

  19. Monday, November 30 Fig. 18-23, p. 525

  20. Monday, November 30 Fig. 18-13, p. 515

  21. Monday, November 30 Fig. 18-14, p. 517

  22. Monday, November 30 Fig. 18-14a, p. 517

  23. Monday, November 30 Fig. 18-14b, p. 517

  24. Monday, November 30 Fig. 18-15, p. 517

  25. Monday, November 30 Fig. 4, p. 518

  26. Monday, November 30 Fig. 4a, p. 518

  27. Monday, November 30 Fig. 4b, p. 518

  28. Monday, November 30 Fig. 4c, p. 518

  29. Monday, November 30 Fig. 4d, p. 518

  30. Monday, November 30 Fig. 4e, p. 518

  31. Monday, November 30 Fig. 18-16, p. 519

  32. Monday, November 30 Fig. 18-17, p. 519

  33. Monday, November 30 Fig. 18-18, p. 520

  34. Stepped Art Monday, November 30 Fig. 18-18, p. 520

  35. Monday, November 30 Fig. 18-19, p. 520

  36. Monday, November 30 Fig. 5, p. 521

  37. Ingredients for an episode of air pollution • Many sources of air pollution close together • A deep stationary high-pressure area • Light surface winds that limit dispersion • A strong subsidence inversion • A shallow mixing layer with poor ventilation • A valley where pollutants can accumulate • Clear skies, radiational cooling at night, and a surface inversion Monday, November 30

  38. Monday, November 30 Table 18-4, p. 522

  39. Monday, November 30 Fig. 18-20, p. 523

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