| 渤海湾北部海域沉积物重金属Cu、Zn释放及动力学研究 |
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| 引用本文： | 王继纲,马启敏,刘茜,武倩倩.渤海湾北部海域沉积物重金属Cu、Zn释放及动力学研究[J].海洋湖沼通报,2007(1):69-73. |
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| 作者姓名： | 王继纲 马启敏 刘茜 武倩倩 |
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| 作者单位： | 中国海洋大学环境科学与工程学院,青岛,266003 |
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| 基金项目： | 国家自然科学基金项目(40136020)资助 |
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| 摘 要： | 以渤海湾北部海域沉积物为研究对象,分别经重金属Cu、Zn污染后,研究了在不同pH和不同粒度条件下Cu、Zn的释放能力,同时研究了在特定酸性条件下Cu、Zn的释放动力学。研究结果表明,重金属Cu、Zn从污染沉积物中的释放,主要是在酸性条件下发生,并且释放量随pH的升高而迅速降低。粒度越大,释放量越大。释放能力Zn>Cu。重金属Cu、Zn的释放动力学过程可分为两个阶段:快速释放阶段和释放平衡阶段。Cu、Zn释放动力学过程可以用Elovich方程和Freundlich修正式较好的描述。
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| 关 键 词： | 重金属 沉积物 释放 pH 粒度 动力学 |
| 文章编号： | 1003-6482（2007）01-0069-05 |
| 修稿时间： | 2005-12-23 |
RELEASE AND KINETICS OF Cu,Zn FROM ALONGSHORE SEABED SEDIMENTS |
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| WANG Jigang,MA Qimin,LIU Qian,WU Qianqian.RELEASE AND KINETICS OF Cu,Zn FROM ALONGSHORE SEABED SEDIMENTS[J].Transaction of Oceanology and Limnology,2007(1):69-73. |
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| Authors: | WANG Jigang MA Qimin LIU Qian WU Qianqian |
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| Institution: | Institute of Environmental Science and Engineering, Ocean University of China, Qingdao 266003, China |
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| Abstract: | This study investigated not only the release of Cu,Zn at different pH values and at different grain-sizes from contaminated sediments by Cu,Zn sampled from alongshore water bodies north of Bohai Bay,but also the releasing kinetics of Cu,Zn under special acidic conditions.The results showed that the release occurred mainly in the range of acidic conditions,and the amount of release decreased quickly with the rise of pH;but the release increased with the rise of grain-size.The order of release was Zn>Cu.The kinetics of metal release was biphasic: the quickly releasing phase,and the releasing balance phase.Both Elovich and Freundlich equations could be used to fit the releasing kinetics quite well. |
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| Keywords: | heavy metals sediment release pH grain-size kinetics |
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