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Heavy Metals & Synthetic Organics

Heavy Metals & Synthetic Organics. Lecture #44 Ch 14-day 4. Catastrophic!. Toxic to all living things Persistent Floats & sinks Thick, viscous coating of everything. Sources: 1: Undersea Offshore Drilling. 5,000 N. America & 3,000 more globally they leak ! BBC Coverage

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Heavy Metals & Synthetic Organics

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  1. Heavy Metals & Synthetic Organics Lecture #44 Ch 14-day 4

  2. Catastrophic! • Toxic to all living things • Persistent • Floats & sinks • Thick, viscous coating of everything

  3. Sources: 1: Undersea Offshore Drilling • 5,000 N. America & 3,000 more globally • they leak! • BBC Coverage • 2010 Deepwater Horizon, BP: Gulf of Mexico, I mile deep • AprilAugust 4 billion barrels oil

  4. (2) Oil Tankers • Exxon Valdez 1989, 11 million gallons (fig 14.14) • Decades of cleanup • 2009 post-spill analysis • $1 billion clean-up, $500 million damages • outcome: double hulled tankers • more Valdez footage

  5. (3) Pipelines • BP Prudhoe Bay 2006 • Exxon: Yellowstone River 2011 • Keystone Pipeline extension

  6. (4) Natural Seepage

  7. Cleaning Up an Oil Spill

  8. Dawn

  9. Floating Oil • Boom containment (down several meters) & suck it up • Shallow waters: absorbent materials • Dispersants (toxic?) • Burn it • GM Bacteria

  10. Deepwater Horizon-What you can’t See: the “plume” • CBS Evening News

  11. Coastlines • Natural action –v- intervention

  12. Lead (Pb)

  13. Lead (Pb)

  14. Arsenic (As)

  15. Arsenic (As)

  16. Arsenic is a Worldwide Problem • Wells in Bangladesh & eastern India • 140 million people worldwide Solution: membrane filters, distillation, reverse osmosis

  17. Mercury (Hg)

  18. Mercury (Hg) Remember: Minamata Bay, Japan

  19. Acid Deposition

  20. Acid Deposition

  21. Cleaning Up Acid Deposition • Scrubbers: • Convert SOx to a different, less harmful substance • CaCO3 + SO2 CaSO4 + H2O • Limestone (CaCO3)

  22. Acid Mine Drainage

  23. Pesticides

  24. Pesticides

  25. Pharmaceuticals

  26. Perchlorates(Military Compounds)

  27. PCB’s (polychlorinated biphenyls)

  28. PCB’s (polychlorinated biphenyls)

  29. Cleaning Up PCB’s • General Electric (G.E.) and the Hudson River • To dredge or not to dredge? • Discharged from 1947-1977 • Court Ruled 2002, work began 2009 • VIDEO: returning a River To Health (EPA)

  30. PBDE’s(polybrominateddiphenyl ethers)

  31. PBDE’s(polybrominateddiphenyl ethers)

  32. The List Goes On • BPA (plastic bottles) (bisphenol-A) • Phthalates (plastics) • MBTE (gasoline additive) • Aspartame (artificial sweetener) • What an you think of ……

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