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- Title
水稻土泥浆体系中多氯联苯的微生物厌氧脱氯.
- Authors
杨 凯; 姚笑颜; 陈 晨; 沈超峰; 秦智慧; 黄荣浪
- Abstract
We studied the dechlorination process of Aroclor1260, a high-chlorinated polychlorinated biphenyls (PCBs) mixture in an anaerobic paddy soil slurry, and further analyzed the related microbial community structures. The Aroclor1260 was reduced up to 55.5% in the natural paddy soil slurry in 128 days, and the reduction percentage dropped to 46.9% after incoculating the paddy soil slurry with a PCBs-dechlorination enrichment culture. The dechlorination mainly occurred in congeners of pentachlorobiphenyl, hexachlorobiphenyl, and specially, the heptachlorobiphenyl, with pentachlorobiphenyl accumulated as dechlorination intermediate. Hydrogen gas produced from fermentation of organic matters was maintained at a lower partial pressure due to its consumption during the dechlorination process, so that the methanogens was suppressed as well. The microbial community structure was significantly different between natural and inoculated paddy soils. Introducing the PCBs-dechlorination enrichment culture changed the local microbial community by the competition between the exogenetic dehlorinators and the indigenous bacteria, overall decreasing the dechlorination activity.
- Publication
Yingyong Shengtai Xuebao, 2015, Vol 26, Issue 10, p3083
- ISSN
1001-9332
- Publication type
Article