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An effective pathway for the removal of microcystin LR via anoxic biodegradation in lake sediments
Chen, Xiaoguo; Yang, Xia; Yang, Lili; Xiao, Bangding; Wu, Xingqiang; Wang, Jutao; Wan, Hongguo; Xiao, BD, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2010
Source PublicationWATER RESEARCH
ISSN0043-1354
Volume44Issue:6Pages:1884-1892
AbstractAerobic biodegradation has been considered to be the main attenuation mechanism for microcystins, but the role of anoxic biodegradation remains unclear. We investigated the potential for anoxic biodegradation of microcystin and the effects of environmental factors on the process through a series of well-controlled microcosm experiments using lake sediments as inocula. Microcystin LR could be degraded anoxically from 5 mg L-1 to below the detection limit at 25 degrees C within 2 days after a lag phase of 2 days. The rate was highly dependent on temperature, with a favorable temperature range of 2G-30 degrees C. The addition of glucose or low levels of NH4-N had no effect on the anoxic biodegradation of microcystin, whereas the addition of NO3-N significantly inhibited the biodegradation at all experimental concentrations, and the inhibition increased with increasing amount of NO3-Namended. Adda (3-amino-9-methoxy-2,6,8-trimethyl-10-phenyl-deca-4,6-dienoic acid), a previously reported nontoxic product of aerobic degradation of microcystin, was identified as the anoxic biodegradation product. This is the first report of Adda as a degradation product of microcystin under anoxic conditions. No other product containing Adda residue was detected during the anoxic degradation of microcystin. These results strongly indicated that anoxic biodegradation is an effective removal pathway of microcystin in lake sediments, and represents a significant bioremediation potential. (C) 2009 Published by Elsevier Ltd.
KeywordMicrocystin Adda Anoxic Degradation Sediment
Department[Xiao, Bangding; Wu, Xingqiang] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Chen, Xiaoguo; Yang, Xia; Yang, Lili; Wang, Jutao; Wan, Hongguo] Wuhan Univ Technol, Dept Environm Sci & Technol, Wuhan 430070, Peoples R China
Subject AreaEngineering, Environmental ; Environmental Sciences ; Water Resources
Funding OrganizationNational Science Foundation of China [20607016]; National Basic Research Program of China [2008CB418101]; National High Technology Research and Development Program of China [2007AA06Z304] ; National Science Foundation of China [20607016]; National Basic Research Program of China [2008CB418101]; National High Technology Research and Development Program of China [2007AA06Z304] ; National Science Foundation of China [20607016]; National Basic Research Program of China [2008CB418101]; National High Technology Research and Development Program of China [2007AA06Z304] ; National Science Foundation of China [20607016]; National Basic Research Program of China [2008CB418101]; National High Technology Research and Development Program of China [2007AA06Z304]
Indexed BySCI
Language英语
WOS IDWOS:000275962200021
Funding OrganizationNational Science Foundation of China [20607016]; National Basic Research Program of China [2008CB418101]; National High Technology Research and Development Program of China [2007AA06Z304] ; National Science Foundation of China [20607016]; National Basic Research Program of China [2008CB418101]; National High Technology Research and Development Program of China [2007AA06Z304] ; National Science Foundation of China [20607016]; National Basic Research Program of China [2008CB418101]; National High Technology Research and Development Program of China [2007AA06Z304] ; National Science Foundation of China [20607016]; National Basic Research Program of China [2008CB418101]; National High Technology Research and Development Program of China [2007AA06Z304]
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/13713
Collection水环境工程研究中心_期刊论文
Corresponding AuthorXiao, BD, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Chen, Xiaoguo,Yang, Xia,Yang, Lili,et al. An effective pathway for the removal of microcystin LR via anoxic biodegradation in lake sediments[J]. WATER RESEARCH,2010,44(6):1884-1892.
APA Chen, Xiaoguo.,Yang, Xia.,Yang, Lili.,Xiao, Bangding.,Wu, Xingqiang.,...&Xiao, BD, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China.(2010).An effective pathway for the removal of microcystin LR via anoxic biodegradation in lake sediments.WATER RESEARCH,44(6),1884-1892.
MLA Chen, Xiaoguo,et al."An effective pathway for the removal of microcystin LR via anoxic biodegradation in lake sediments".WATER RESEARCH 44.6(2010):1884-1892.
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