COMPARISON OF REDUCTIVE DECHLORINATION OF HEXACHLORO-1,3-BUTADIENE IN RHINE SEDIMENT AND MODEL SYSTEMS WITH HYDROXOCOBALAMIN

被引:35
作者
BOSMA, TNP
COTTAAR, FHM
POSTHUMUS, MA
TEUNIS, CJ
VANVELDHULZEN, A
SCHRAA, G
ZEHNDER, AJB
机构
[1] AGR UNIV WAGENINGEN,DEPT MICROBIOL,6700 HB WAGENINGEN,NETHERLANDS
[2] AGR UNIV WAGENINGEN,DEPT ORGAN CHEM,6700 HB WAGENINGEN,NETHERLANDS
关键词
D O I
10.1021/es00055a023
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Transformations of hexachloro-1,3-butadiene were studied in columns packed with Rhine River sediment and in batch incubations containing titanium(III) citrate and hydroxocabalamin. Columns were operated under various redox conditions. Transformation was observed in a methanogenic column at influent concentrations of 4 and 400 nmol/L but not in columns where oxygen or nitrate were fed as terminal electron acceptors. Hexachloro-1,3-butadiene was reductively dechlorinated to (E,E)-1,2,3,4-tetrachlorobutadiene (>90%) and traces of a trichloro-1,3-butadieneisomer (<5%). (E)-1,1,2,3,4-Pentachloro-1,3-butadiene was detected as intermediary product. Reductive dechlorination in the column was ascribed to the activity of anaerobic microorganisms. In the batch experiments with titanium(III) citrate and hydroxocobalamin, hexachloro-1,3-butadiene (5 and 500 mumol/L) was transformed to an isomer of pentachloro-1,3-butadiene and two compounds with molar masses of 154 and 52, tentatively identified as trichloro-1-buten-3-yn, and 1-buten-3-yn respectively.
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页码:1124 / 1128
页数:5
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