AEROBIC DEGRADATION OF POLYCHLORINATED BIPHENYLS
AEROBIC DEGRADATION OF POLYCHLORINATED BIPHENYLS
批准号:
6258864
负责人:
JAMES M TIEDJE
金额:
$0.0万
依托单位国家:
美国
项目类别:
财政年份:
1997
资助国家:
美国
项目状态:
已结题
起止时间:
1997-06-01 至 1999-11-30
中文摘要
多氯联苯(PCBs)是一种应用广泛的化学材料
英文摘要
Polychlorinated biphenyls (PCBs) were widely used and are
considered now as one of the most problematic pollutants. The most
promising approach for bioremediation of PCBs is a combined
anaerobic-aerobic process. Anaerobic degradation results in reductive
dechlorination of highly chlorinated PCBs and accumulation of less
chlorinated congeners. Eight congeners including 2-, 4-, 2,4-, 2,6-,
2-2-, 2-4-, 2,4-2-, and 2,4-4-chlorobiphenyl (CB) comprise from 70
to 85% of anaerobic dechlorination products from Aroclor 1242.
Although many aerobic bacteria have been screened for the spectra of
PCBs which they can degrade, little is known about degradation and
final products formed from congeners that accumulate during anaerobic
dechlorination processes. Four bacterial strains were chosen for this
investigation based on their superb PCB degradative abilities. Mass
spectrometry was employed to analyze the specificity of the primary
PCBs attack and the final products formed by aerobic bacteria. Based
on mass spectrometry, UV-spectroscopy and HPLC data strains
Rhodococcus sp. RHA1 and Burkholderia sp. LB400 were concluded to
preferentially attack on ortho-chlorinated rings, while another two
strains (Commamonas testosteroni VP44 and Rhodococcus sp. NY05)
preferentially oxidized a para-substituted rings. It was shown that
the ortho-focused strains showed more efficient degradation of Aroclor
anaerobic dechlorination products. It is known that aerobic
degradation of PCBs usually involves partial degradation and results
in the production of chlorobenzoates. We also found chlorobenzoates
as the major products of degradation of selected congeners. However,
degradation of 2-4 and 2,4-4-CB by para-focused bacteria resulted in
incomplete transformation of these congeners and accumulation of
meta-cleavage products of these chlorobiphenyls as a dead end
metabolites. These compounds were identified based on mass
spectrometric data (GC-MS).
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会议论文
Molecular Insight into Polyaromatic Toxicant Degradation by Microbial Communities
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批准号:8055596
-
项目类别:
-
资助金额:$43.56万
-
财政年份:2010
-
负责人:JAMES M TIEDJE
-
依托单位:
Molecular Insight into Polyaromatic Toxicant Degradation
-
批准号:7064105
-
项目类别:
-
资助金额:$41.07万
-
财政年份:2006
-
负责人:JAMES M TIEDJE
-
依托单位:
ECOLOGY AND DIVERSITY OF BTEX DEGRADING BACTERIA IN BIOREACTORS AND AQUIFERS
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批准号:6296553
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项目类别:
-
资助金额:$15.1万
-
财政年份:1999
-
负责人:JAMES M TIEDJE
-
依托单位:
ECOLOGY AND DIVERSITY OF BTEX DEGRADING BACTERIA IN BIOREACTORS AND AQUIFERS
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批准号:6106201
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项目类别:
-
资助金额:$15.1万
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财政年份:1999
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负责人:JAMES M TIEDJE
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依托单位:
ECOLOGY AND DIVERSITY OF BTEX DEGRADING BACTERIA IN BIOREACTORS AND AQUIFERS
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批准号:6217616
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项目类别:
-
资助金额:$15.1万
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财政年份:1999
-
负责人:JAMES M TIEDJE
-
依托单位:
ECOLOGY AND DIVERSITY OF BTEX DEGRADING BACTERIA IN BIOREACTORS AND AQUIFERS
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批准号:6271086
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项目类别:
-
资助金额:$16.33万
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财政年份:1998
-
负责人:JAMES M TIEDJE
-
依托单位:
ECOLOGY AND DIVERSITY OF BTEX DEGRADING BACTERIA IN BIOREACTORS AND AQUIFERS
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批准号:6239503
-
项目类别:
-
资助金额:$15.54万
-
财政年份:1997
-
负责人:JAMES M TIEDJE
-
依托单位:
BIODEGRADATION OF VOLATILE ORGANIC COMPOUNDS
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批准号:3855716
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项目类别:
-
资助金额:$0.0万
-
财政年份:--
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负责人:JAMES M TIEDJE
-
依托单位:
Molecular Insight into Polyaromatic Toxicant Degradation by Microbial Communities
-
批准号:7466403
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项目类别:
-
资助金额:$40.96万
-
财政年份:--
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负责人:JAMES M TIEDJE
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依托单位:
ECOLOGY AND DIVERSITY OF BTEX DEGRADING BACTERIA IN BIOREACTORS AND AQUIFERS
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批准号:3733752
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项目类别:
-
资助金额:$0.0万
-
财政年份:--
-
负责人:JAMES M TIEDJE
-
依托单位:
Molecular Insight into Polyaromatic Toxicant Degradation by Microbial Communities
-
批准号:7599128
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项目类别:
-
资助金额:$45.06万
-
财政年份:--
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负责人:JAMES M TIEDJE
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依托单位:
TRACKING BIODEGRADING POPULATIONS IN BIOREACTORS AND AQUIFERS
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批准号:3840802
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项目类别:
-
资助金额:$0.0万
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财政年份:--
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负责人:JAMES M TIEDJE
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依托单位:
BIODEGRADATION OF VOLATILE ORGANIC COMPOUNDS
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批准号:3898048
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项目类别:
-
资助金额:$0.0万
-
财政年份:--
-
负责人:JAMES M TIEDJE
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依托单位:
BIODEGRADATION OF VOLATILE ORGANIC COMPOUNDS
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批准号:3876766
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项目类别:
-
资助金额:$0.0万
-
财政年份:--
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负责人:JAMES M TIEDJE
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依托单位:
ECOLOGY AND DIVERSITY OF BTEX DEGRADING BACTERIA IN BIOREACTORS AND AQUIFERS
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批准号:5211164
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项目类别:
-
资助金额:$0.0万
-
财政年份:--
-
负责人:JAMES M TIEDJE
-
依托单位:--
TRACKING BIODEGRADING POPULATIONS IN BIOREACTORS AND AQUIFERS
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批准号:3777252
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项目类别:
-
资助金额:$0.0万
-
财政年份:--
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负责人:JAMES M TIEDJE
-
依托单位:
Molecular Insight into Polyaromatic Toxicant Degradation by Microbial Communities
-
批准号:7792422
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项目类别:
-
资助金额:$42.69万
-
财政年份:--
-
负责人:JAMES M TIEDJE
-
依托单位:
TRACKING BIODEGRADING POPULATIONS IN BIOREACTORS AND AQUIFERS
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批准号:3755139
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项目类别:
-
资助金额:$0.0万
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财政年份:--
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负责人:JAMES M TIEDJE
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依托单位:
海外基金