| Study of inhibition mechanism of NO(3)(-) on photoreduction of Hg(II) in artificial water. | |
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MedLine Citation:
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PMID: 22209302 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Photoreduction is of immense importance to mercury transfer from water to atmosphere. In this investigation, the reduction of HgCl(2) and Hg(NO(3))(2) under dark, natural light and ultraviolet radiation (UV) was estimated using series of laboratory experiments. The result showed that the role of light irradiation in HgCl(2) reduction was entirely different from that in Hg(NO(3))(2). The rate of HgCl(2) reduction was in the order of UV>natural light>dark, compared with dark>natural light>UV of Hg(NO(3))(2). The experiments of mercury reduction treated by KNO(3) and CH(3)OH, which was used as a NO(3)(-) provider and a ()OH scavenger respectively, indicated that ()OH which was produced via direct photolysis of NO(3)(-) in water should be responsible for the unexpected inhibition of UV to Hg(NO(3))(2) reduction. The reduction of Hg(NO(3))(2) under different radiation intensity each of UVA, UVB and UVC was investigated. The result showed that UVB induced the highest mercury reduction while mercury reduction increased with light intensity. In addition, the kinetic study of mercury reduction under natural light was conducted through both concentration gradient method and trial method. The pseudo first rate constant was estimated to be 7×10(-4)min(-1). |
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Authors:
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Yutao Zhang; Rongguo Sun; Ming Ma; Dingyong Wang |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-29 |
Journal Detail:
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Title: Chemosphere Volume: - ISSN: 1879-1298 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2012-1-2 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0320657 Medline TA: Chemosphere Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
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Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Resources and Environment, Southwest University, Chongqing 400715, China; Department of Chemistry, Biology and Agriculture in Anshun College, Guizhou, Anshun 561000, China. |
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