Chinese Journal of Applied Ecology
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YANG Kai, YAO Xiao-yan, CHEN Chen, SHEN Chao-feng, QIN Zhi-hui, HUANG Rong-lang
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Abstract: We studied the dechlorination process of Aroclor1260, a highchlorinated 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 PCBsdechlorination 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 PCBsdechlorination enrichment culture changed the local microbial community by the competition between the exogenetic dchlorinators and the indigenous bacteria, overall decreasing the dechlorination activity.
YANG Kai, YAO Xiao-yan, CHEN Chen, SHEN Chao-feng, QIN Zhi-hui, HUANG Rong-lang. Microbial anaerobic dechlorination of polychlorinated biphenyls in paddy soil slurry.[J]. Chinese Journal of Applied Ecology.
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URL: https://www.cjae.net/EN/abstract/abstract11873.shtml
https://www.cjae.net/EN/Y2015/V26/I10/3083