1. Air Pollution (continued) Chapter 18 Ahrens Monday, 30 November Class #37 1Monday, 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 302

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 303

4. Santiago, Chile Monday, November 304 Fig. 18-CO, p. 500

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

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

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

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

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

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

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

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

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

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 3014

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

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 3016

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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 3037

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

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