| 胶州湾近岸沉积物-海水汞的释放研究 |
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| 引用本文： | 单长青,刘汝海,单红仙.胶州湾近岸沉积物-海水汞的释放研究[J].海洋湖沼通报,2006(4):44-51. |
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| 作者姓名： | 单长青 刘汝海 单红仙 |
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| 作者单位： | 中国海洋大学海洋环境与生态教育部重点实验室,青岛,266003 |
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| 基金项目： | 国家自然科学基金(40371100)，国家海洋局海域办专项基金资助 |
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| 摘 要： | 本文通过模拟实验研究了胶州湾海泊河口和李村河口沉积物中的汞在不同环境条件下向海水的释放,并对汞的释放动力学数据进行了拟合。总体上两种沉积物汞的释放浓度分别为1.41~5.99μg/L和1.06~3.62μg/L,最大释放率分别为2.7%和3.4%,对胶州湾潮间带水质产生较大的影响。海水的pH值、温度和沉积物厚度都会影响汞的释放。pH<7时,汞的释放作用随pH值的升高而降低,pH>7时,汞的释放作用随pH值的升高而增大;海水温度越高,汞的释放作用越强;随沉积物厚度的增加,汞的释放量增加,释放率降低,海泊河口和李村河口沉积物的有效厚度分别为3.5cm和2.5cm。汞的释放动力学拟合结果表明多个方程都能较好的描述汞的释放动力学过程,其中以Ho的二级动力学方程拟合结果最好。
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| 关 键 词： | 胶州湾 沉积物 汞 释放 |
| 文章编号： | 1003-6482（2006）04-0044-08 |
| 收稿时间： | 2005-12-21 |
| 修稿时间： | 2005年12月21 |
THE RESEARCH ON RELEASING OF MERCURY FROM JIAOZHOU BAY OFFSHORE SEDIMENT TO SEAWATER |
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| SHAN Changqing,LIU Ruhai,SHAN Hongxian.THE RESEARCH ON RELEASING OF MERCURY FROM JIAOZHOU BAY OFFSHORE SEDIMENT TO SEAWATER[J].Transaction of Oceanology and Limnology,2006(4):44-51. |
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| Authors: | SHAN Changqing LIU Ruhai SHAN Hongxian |
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| Institution: | College of Environmental Science and Engineering, Ocean University of China, Qingdao 266003 |
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| Abstract: | The releasing of mercury from Haipo,Licun Estuary Sediment to Seawater were studied under several environmental conditions.The releasing content of the two sediment are 1.41~5.99 g/L and 1.06~3.62 g/L respectively.The max releasing rate are 2.7% and 3.4% respectively.This will heavily affect the tidal seawater of Jiaozhou Bay.The releasing of mercury are affected by the pH,temperature of seawater and the sediment depth.When pH <7,the releasing of mercury decreased with increasing pH,and when pH >7,the releasing of mercury increased with increasing pH.The releasing of mercury increased with increasing temperature of seawater.With increasing sediment depth,the releasing content increased,and the releasing rate decreasing.The effective depth of Haipo and Licun Estuary Sediment are 3.5cm and 2.5cm respectively.Some equations could be used to fit the releasing kinetics of mercury,and the best is the second-order equation. |
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| Keywords: | Jiaozhou Bay sediment mercury release |
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