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Sulfur-containing amino acid methionine as the precursor of volatile organic sulfur compounds in algea-induced black bloom
作者姓名:Xin Lu  Chengxin Fan  Wei He  Jiancai Deng  Hongbin Yin
作者单位:State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;University of School of the Chinese Academy of Sciences, Beijing 100049, China;State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;University of School of the Chinese Academy of Sciences, Beijing 100049, China;State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
基金项目:This study was supported by the National Natural Science Foundation of China (No. 50979102, 40730528, 40901252, 20907057). The authors gratefully acknowledge Miao Jin for her assistance in VOSCs detection.
摘    要:After the application of methionine, a progressive and significant increase occurred in five volatile organic sulfur compounds (VOSCs): methanethiol (MeSH), dimethyl sulfide (DMS), dimethyl disulfide (DMDS), dimethyl trisulfide (DMTS) and dimethyl tetrasulfide (DMTeS). Even in the untreated control without a methionine addition, methionine and its catabolites (VOSCs, mainly DMDS) were found in considerable amounts that were high enough to account for the water’s offensive odor. However, blackening only occurred in two methionine-amended treatments. The VOSCs production was observed to precede black color development, and the reaching of a peak value for total VOSCs was often followed by water blackening. The presence of glucose stimulated the degradation of methionine while postponing the occurrence of the black color and inhibiting the production of VOSCs. In addition, DMDS was found to be the most abundant species produced after the addition of methionine alone, and DMTeS appeared to be the most important compound produced after the addition of methionine+glucose. These results suggest that methionine acted as an important precursor of the VOSCs in lakes suffering from algea-induced black bloom. The existence of glucose may change the transformation pathway of methionine into VOSCs to form larger molecular weight compounds, such as DMTS and DMTeS.

关 键 词:algal  blooms  black  bloom  methionine  volatile  organic  sulfur  compounds  sulfur-containing  amino  acid
收稿时间:2/7/2012 12:00:00 AM
修稿时间:28 June 2012

Sulfur-containing amino acid methionine as the precursor of volatile organic sulfur compounds in algea-induced black bloom
Xin Lu,Chengxin Fan,Wei He,Jiancai Deng,Hongbin Yin.Sulfur-containing amino acid methionine as the precursor of volatile organic sulfur compounds in algea-induced black bloom[J].Journal of Environmental Sciences,2013,25(1):33-43.
Authors:Xin Lu  Chengxin Fan  Wei He  Jiancai Deng and Hongbin Yin
Institution:State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China. E-mail: lxdeng@126.com;University of School of the Chinese Academy of Sciences, Beijing 100049, China;State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China. E-mail: lxdeng@126.com;State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China. E-mail: lxdeng@126.com;University of School of the Chinese Academy of Sciences, Beijing 100049, China;State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China. E-mail: lxdeng@126.com;State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China. E-mail: lxdeng@126.com
Abstract:After the application of methionine, a progressive and significant increase occurred in five volatile organic sulfur compounds (VOSCs): methanethiol (MeSH), dimethyl sulfide (DMS), dimethyl disulfide (DMDS), dimethyl trisulfide (DMTS) and dimethyl tetrasulfide (DMTeS). Even in the untreated control without a methionine addition, methionine and its catabolites (VOSCs, mainly DMDS) were found in considerable amounts that were high enough to account for the water's offensive odor. However, blackening only occurred in two methionine-amended treatments. The VOSCs production was observed to precede black color development, and the reaching of a peak value for total VOSCs was often followed by water blackening. The presence of glucose stimulated the degradation of methionine while postponing the occurrence of the black color and inhibiting the production of VOSCs. In addition, DMDS was found to be the most abundant species produced after the addition of methionine alone, and DMTeS appeared to be the most important compound produced after the addition of methionine+glucose. These results suggest that methionine acted as an important precursor of the VOSCs in lakes suffering from algea-induced black bloom. The existence of glucose may change the transformation pathway of methionine into VOSCs to form larger molecular weight compounds, such as DMTS and DMTeS.
Keywords:algal blooms  black bloom  methionine  volatile organic sulfur compounds  sulfur-containing amino acid
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