REDUCTIVE DECHLORINATION OF POLYCHLORINATED BIPHENYL BY AN ANAEROBIC SEDIMENT-FREE CULTURE
An anaerobic sediment-free culture capable of dechlorinating chlorinated compounds was successfully cultivated by feeding with the commercial polychlorinated biphenyl (PCB) mixture, Aroclor 1260, as electron acceptors. Gas chromatography-electron capture detector (GC-ECD) analysis revealed that this culture could dechlorinate most prominent congeners in Aroclor 1260 after 2 months of incubation through the removal of the doubly flanked meta or para chlorines. After 73 days, concentrations of parent compounds like 2,2,3,4,56-chlorinated biphenyl (236- 245-CB), 234-245-CB and 2345-245-CB were significantly reduced with a corresponding increase of 245-24-CB, 235-245-CB and 2356-245-CB as the dechlorination products. This culture was also tested on its potential to dechlorinate other halogenated compounds such as trichloroethene (TCE) and 2,4,6-trichlorophenol (2,4,6-TCP). Both TCE and 2,4,6-TCP were completely dechlorinated to ethene and 4-chlorophenol (4-CP), respectively. Given its efficiency and capability to dechlorinate a broad range of halogenated compounds, this sediment-free culture shows great promise for advanced development in its practical applications in halogenated compound-contaminated waste treatment as well as in situ bioremediation technologies and strategies.
Shanquan Wang Chong Joon Chuah Lip Kim Lee Dan Cheng Jianzhong He
Division of Environmental Science and Engineering National University of Singapore,Singapore 117576
国际会议
北京
英文
1-5
2009-08-24（万方平台首次上网日期，不代表论文的发表时间）