中文摘要：

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。

英文摘要：

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.