Содержание
- 2. Soil contaminants are spilled onto the surface through many different activities. Most of these are the
- 3. Others involve accidents involving vehicles (automobiles, trucks and airplanes) not transporting wastes, but carrying materials, including
- 4. Other spills are the direct action of humans pouring potentially toxic materials (solvents, paints, household cleaning
- 5. Pollutant on soil surface When any liquid pollutant is on or just below the ground surface
- 6. 2- the pollutant, if volatile, could evaporate, again causing little harm to the soil (however, not
- 7. Agricultural practices, including the use of agricultural chemicals, are another primary source of pollution on or
- 8. Ag Chemicals When not used by the plants the nutrients can enter streams and lakes during
- 9. "Biochemical Oxygen Demand", or "BOD". Water is capable of supporting a large population of bacteria and
- 10. Soil Pollution Information needed to clean up materials added to soil include: 1) Kind of material
- 11. Soil Pollution 4) Kind of Soil - will the soil be able to handle the material
- 12. Bioremediation A treatment process that uses microorganisms (yeast, fungi, or bacteria) to break down, or degrade,
- 13. Conditions that favor Bioremediation Temperature favorable for organisms Water available (near field capacity) Nutrients (N, P,
- 14. In-situ-Bioremediation Biostimulation (stimulates biological activity) Bioventing (Inject air/nutrients into unsaturated zone – good for midweight petroleum,
- 15. Biostimulation cont. Biosparging
- 16. Ex-situ -Bioremediation Slurry-phase Soil combined with water/additives in tank, microorganisms, nutrients, oxygen added Solid-phase Land-farming: soil
- 17. Slurry, Solid Phase, & Land Applied
- 18. Using Plants for pollution cleanup Scientists are studying how plants can be used to bind up
- 19. Processes affecting the dissipation of organic chemicals photo-dec. absorption & exudation volatilization Biological degradation leaching chemical
- 20. Affect of soil pH on adsorption of 4 heavy metals Adsorption high = Good Soil pH
- 21. BUTER BURN -Just how does a city go about cleaning up after a flood of melted
- 22. All told, an estimated $6 million worth of butter -- about half of what was stored
- 23. The End
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