| 红枫湖水体中活性汞和溶解气态汞的分布特征及其控制因素 |
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| 引用本文： | 何天容,冯新斌,郭艳娜,孟 博,李仲根,仇广乐.红枫湖水体中活性汞和溶解气态汞的分布特征及其控制因素[J].环境科学研究,2008,21(2):14-17. |
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| 作者姓名： | 何天容 冯新斌 郭艳娜 孟 博 李仲根 仇广乐 |
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| 作者单位： | 1.中国科学院 地球化学研究所,环境地球化学国家重点研究实验室,贵州 贵阳 550002;贵州大学(蔡家关校区), 喀斯特环境与地质灾害防治教育部重点实验室,贵州贵阳550003 |
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| 摘 要： | 基于二次金汞齐结合冷原子荧光测定法对红枫湖活性汞(RHg)和溶解气态汞(DGM)的时空分布特征及其控制因素进行了研究. 红枫湖溶解气态汞含量(ρ(DGM))为0.024～0.110 ng/L，随着水深的增加ρ(DGM)降低，且夏季高，冬季低，这种分布特征表明光在原子态汞的形成中起着重要的作用. 红枫湖ρ(DGM)除受光强影响外，还受到春季后五大量生长的藻类影响，但与溶解性有机碳含量(ρ(DOC))及温度的相关性不大. 活性汞含量(ρ(RHg))为0.14～2.70 ng/L，其主要受Hg2+的光致还原过程，Hg2+的甲基化过程以及人为源的释放等因素的控制.
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| 关 键 词： | 溶解气态汞 活性汞 时空分布 红枫湖 |
| 文章编号： | 1001-6929(2008)02-0014-04 |
| 收稿时间： | 2007/7/29 0:00:00 |
| 修稿时间： | 2007年7月29日 |
Distributions of Reactive and Dissolved Gaseous Mercury and Controlling Factors in Hongfeng Reservoir |
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| HE Tian-rong,FENG Xin-bin,GUO Yan-n,MENG Bo,LI Zhong-gen and QIU Guang-le.Distributions of Reactive and Dissolved Gaseous Mercury and Controlling Factors in Hongfeng Reservoir[J].Research of Environmental Sciences,2008,21(2):14-17. |
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| Authors: | HE Tian-rong FENG Xin-bin GUO Yan-n MENG Bo LI Zhong-gen and QIU Guang-le |
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| Institution: | 1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;Key Laboratory of Karst Environment and Geohazard Prevention, Guizhou University, Guiyang 550003, China2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China |
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| Abstract: | Distributions of reactive and dissolved gaseous mercury and controlling factors were investigated in Hongfeng Reservoir based on gold trap and cold vapour atomic fluorescence detection. Dissolved gaseous mercury (DGM) concentrations changed from 0.024 to 0.110 ng/L. DGM concentrations were higher in summer than in winter, and decreased with increasing water depth. The vertical and seasonal distribution patterns of DGM showed the photoreduction of Hg (Ⅱ) complexes served as a major source of Hg0 production in water. DGM concentrations were also affected by algae activities, but were not related with temperature and dissolved carbon. RHg concentrations changed from 0.14 to 2.70 ng/L and were mainly controlled by photoreduction and methylation of Hg2+, as well as mercury contaminations. |
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| Keywords: | dissolved gaseous mercury reactive mercury spatial and temporal distributions Hongfeng Reservoir |
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