7. bioremediation.220.f2012
TRANSCRIPT
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Figure 24.15
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Figure 24.15c
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Figure 24.15d
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Figure 24.16
Low-gradecopper ore(CuS)
Sprinkling of acidic solution on CuS
Soluble Cu2Cu2
Precipitationpond
Copper metal (Cu0)
Acidic Fe2-rich solution
Acidic solutionpumped back totop of leach dump
H2SO4addition
Recovery of copper metal (Cu0)
Fe0 Cu2 Cu0 Fe2(Fe0 from scrap steel)
Oxidation pond
Leptospirillum ferrooxidans
Acidithiobacillus ferrooxidans
1. CuS 2 O2 Cu2 SO42
Cu2 8 Fe2 SO42 8 H2. CuS 8 Fe3 4 H2O
Copper ore can be oxidized by oxygen-dependent (1) and oxygen-independent(2) reactions, solubilizing the copper:
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Figure 24.17
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Figure 24.18
Atmosphere
Water
Sediment
Photochemical andother oxidations
Uptake byaquatic animals
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Figure 24.19
Encodes MerR, a transcriptional repressor and activator
Encodes MerD, regulation
mer operon
Mercury metabolism
Periplasm
Cytoplasmicmembrane
Mercuricreductase
Organomercurylyase
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Figure 24.19a
Encodes MerR, a transcriptional repressor and activator
Encodes MerD, regulation
mer operon
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Figure 24.19b
Mercury metabolism
Periplasm
Cytoplasmicmembrane
Mercuricreductase
Organomercurylyase
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Figure 24.20
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Figure 24.21
Oil droplets Bacteria
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Fi 24 22
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Figure 24.22
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Figure 24.23
DDT, dichlorodiphenyltrichloroethane(an organochlorine)
Malathion, mercaptosuccinicacid diethyl ester(an organophosphate)
Site of additionalCl for 2,4,5,-T
2,4-D, 2,4-dichlorophenoxy-acetic acid Atrazine, 2-chloro-4-ethylamino-6-isopropylaminotriazine
Monuron,3-(4-chlorophenyl)-1,1-dimethylurea
(a substituted urea)
Chlorinated biphenyl (PCB),shown is 2,3,4,2,4,5-hexachlorobiphenyl
Trichloroethylene
Reductive
Dechlorination
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Figure 24.24
Acetate
DioxygenaseSuccinate
Acetate
2,4,5,-TTo citric acid cycle
Reductive
Dechlorination
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Figure 24.25
Polyethylene Polypropylene Polyvinyl chloride(PVC)
Polystyrene Polyurethane Teflon
PHV PHB