TY - JOUR
T1 - 2-bromoethanesulfonate (BES) Enhances Sulfate-reducing Bacterial Population and Dichlorodiphenyltrichloroethane (DDT) Dechlorination in an Anaerobic Paddy Soil
AU - Hu, Junli
AU - Hu, Zhengyi
AU - Cui, Xiangchao
AU - Li, Jing
AU - Xia, Xu
AU - Yin, Rui
AU - Lin, Xiangui
N1 - We are grateful to Dr. Fang Wang for providing experimental materials, and to Ms. Qian Jiang and Ms. Rui Wang for their useful discussions on the analytical method and kind assistance in sample analysis. We also wish to acknowledge Dr. Linda Cameron and Dr. Haiyan Chu, as well as four anonymous reviewers, for their useful comments and suggestions on manuscript revision and English editing. This work was supported by the National Natural Science Foundation (No.20777092 & 40671101) and the National High Technology Research and Development Program (2007AA061101) of China.
PY - 2012/8
Y1 - 2012/8
N2 - 2-bromoethanesulfonate (BES) is a structural analogue of 2-mercaptoethanesulfonic acid (coenzyme M) and often used to specifically inhibit methanogenesis. The role of BES and sulfate on the reductive dechlorination of dichlorodiphenyltrichloroethane (DDT) was compared in an anaerobic soil slurry reactor of sulfate-reducing system in this study. The population of soil sulfate-reducing bacteria (SRB) was markedly decreased under DDT condition compared to DDT-free reactor, while greatly increased by sulfate and slightly increased by BES. However, the dechlorination rate of DDT was the highest in the DDT+BES treatment, followed in order by DDT+Sulfate and the control condition. In the DDT+BES treatment, more than 60% of DDT-Cl was cleaved within 16 weeks, which was about 124% and 369% greater than that in the DDT+Sulfate treatment and under the control condition, respectively. The results suggested that the inhibition of methanogenesis by BES was another pathway to improve sulfate-reducing activity and the related dechlorination rate of DDT in waterlogged soils.
AB - 2-bromoethanesulfonate (BES) is a structural analogue of 2-mercaptoethanesulfonic acid (coenzyme M) and often used to specifically inhibit methanogenesis. The role of BES and sulfate on the reductive dechlorination of dichlorodiphenyltrichloroethane (DDT) was compared in an anaerobic soil slurry reactor of sulfate-reducing system in this study. The population of soil sulfate-reducing bacteria (SRB) was markedly decreased under DDT condition compared to DDT-free reactor, while greatly increased by sulfate and slightly increased by BES. However, the dechlorination rate of DDT was the highest in the DDT+BES treatment, followed in order by DDT+Sulfate and the control condition. In the DDT+BES treatment, more than 60% of DDT-Cl was cleaved within 16 weeks, which was about 124% and 369% greater than that in the DDT+Sulfate treatment and under the control condition, respectively. The results suggested that the inhibition of methanogenesis by BES was another pathway to improve sulfate-reducing activity and the related dechlorination rate of DDT in waterlogged soils.
KW - Anaerobic soil slurry reactor
KW - Freundlich Equation
KW - methanogenesis
KW - reductive dechlorination
KW - sulfate-reducing bacteria
UR - http://www.scopus.com/inward/record.url?scp=84865074519&partnerID=8YFLogxK
U2 - 10.1080/15320383.2012.691131
DO - 10.1080/15320383.2012.691131
M3 - Journal article
AN - SCOPUS:84865074519
SN - 1532-0383
VL - 21
SP - 732
EP - 738
JO - Soil and Sediment Contamination
JF - Soil and Sediment Contamination
IS - 6
ER -
