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学科主题: Engineering, Environmental; Environmental Sciences; Water Resources
题名: An effective pathway for the removal of microcystin LR via anoxic biodegradation in lake sediments
作者: Chen, Xiaoguo2; Yang, Xia2; Yang, Lili2; Xiao, Bangding1; Wu, Xingqiang1; Wang, Jutao2; Wan, Hongguo2
通讯作者: Xiao, BD, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
关键词: Microcystin ; Adda ; Anoxic ; Degradation ; Sediment
刊名: WATER RESEARCH
发表日期: 2010-03-01
DOI: 10.1016/j.watres.2009.11.025
卷: 44, 期:6, 页:1884-1892
收录类别: SCI
文章类型: Article
部门归属: [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
WOS标题词: Science & Technology ; Technology ; Life Sciences & Biomedicine ; Physical Sciences
资助者: National Science Foundation of China [20607016]; National Basic Research Program of China [2008CB418101]; National High Technology Research and Development Program of China [2007AA06Z304]
类目[WOS]: Engineering, Environmental ; Environmental Sciences ; Water Resources
研究领域[WOS]: Engineering ; Environmental Sciences & Ecology ; Water Resources
摘要: Aerobic 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.
英文摘要: Aerobic 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 NH(4)-N had no effect on the anoxic biodegradation of microcystin, whereas the addition of NO(3)-N significantly inhibited the biodegradation at all experimental concentrations, and the inhibition increased with increasing amount of NO(3)-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.
关键词[WOS]: CYANOBACTERIAL HEPATOTOXIN MICROCYSTIN ; BACTERIAL-DEGRADATION ; WATER ; RESERVOIR ; CYANOPHYCEAE ; ADSORPTION ; TOXINS ; HPLC ; RR
语种: 英语
WOS记录号: WOS:000275962200021
ISSN号: 0043-1354
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/13713
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2.Wuhan Univ Technol, Dept Environm Sci & Technol, Wuhan 430070, Peoples R China

Recommended Citation:
Chen, Xiaoguo; Yang, Xia; Yang, Lili; Xiao, Bangding; Wu, Xingqiang; Wang, Jutao; Wan, Hongguo.An effective pathway for the removal of microcystin LR via anoxic biodegradation in lake sediments,WATER RESEARCH,2010,44(6):1884-1892
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