1. Air Quality & Pollution Control Chapters 12 and 13 1

2. Good vs. Poor Air Quality 2

3. Poor Air Quality? 3

4. 4

5. Particulate Matter 5

6. Acid Precipitation/Deposition 6

7. Smog 7

8. Antarctica Ozone Concentrations 8

9. 9

10. Model of Global Heat Reflected solar radiation 107 W m -2 Reflected by clouds, aerosols, and atmosphere 77 W m -2 Incoming solar radiation 342 W m -2 342 77 107 67 24 78 165 30 40 235 324 350 168 Emitted by atmosphere Absorbed by atmosphere Back radiation Reflected by surface 30 Absorbed by surface 168 Thermals 24 Atmospheric Window Outgoing longwave radiation 235 W m -2 40 30 168 Evapo- transpirtation 78 Surface radiation 390 350 10

11. 11

12. 12

13. Indoor Air Pollution 13

14. Activity A family member is considering buying an ozone generator to improve indoor air quality. Is this purchase a good idea? 14

15. PM 2.5 Nonattainment 2008 2009 15

16. Dust Inlet Outlet Inlet Outlet Cyclones Air flows in a funnel-shaped stream 16

17. Dust Inlet Outlet Inlet Cyclones Air flows in a funnel-shaped stream Outlet 17

18. Dust Inlet Outlet Inlet Cyclones Air flows in a funnel-shaped stream Outlet 18

19. Dust Inlet Outlet Inlet Cyclones Air flows in a funnel-shaped stream Outlet 19

20. Dust Inlet Outlet Inlet Cyclones Air flows in a funnel-shaped stream Outlet 20

21. Dust Inlet Outlet Inlet Cyclones Air flows in a funnel-shaped stream Outlet 21

22. Dust Inlet Outlet Inlet Cyclones Air flows in a funnel-shaped stream Outlet 22

23. Cyclone 23

24. Baghouses 24

25. Positively charged plates Negatively charged wires Electrostatic Precipitator 25

26. Scrubber 26

27. Activity Vehicles were the largest air pollution source in Illinois in 2003 – 2004 according to the IEPA. How can the profession of civil engineering reduce the impact of vehicles on air quality? 27

28. Material Balance Approach to Calculations (Section 4.1) Accumulation = Input – Output + Generation – Consumption Common assumptions: Steady state Clean air brought in Complete mix conditions 28