黄河中游泥沙对铜离子的吸持行为研究

以黄河中游泥沙和重金属Cu为研究对象，通过等温吸持实验和Tessier形态提取实验，研究了黄河中游泥沙在含量较高的条件下对铜离子的吸持特性．结果表明：黄河中游泥沙具有很强的吸持铜的能力．体系pH和泥沙理化性质对吸持具有强烈影响：当铜浓度较低时，pH是控制吸持的主要因素，不同泥沙对铜的吸持率均达到99％，泥沙吸持的空间差异很小；当铜浓度较高时，泥沙理化性质是使黄河中游泥沙吸持表现出空间差异的重要因素，碳酸盐是主要影响组份；在泥沙含量较高的条件下，单位吸持量随泥沙含量变化的规律符合“泥沙效应”规律，但吸持容量随泥沙含量升高而升高，这与泥沙含量升高导致体系pH升高有关。

Copper sorption by sediments from the middle Yellow River

The sorption of copper onto sediments from the middle Yellow River and major effecting factors were studied.Experiments have been conducted with sediment samples taken from Tongguan,Sanmenxia and Huayuankou.Both suspended and bottom sediments were analysed.It was found that the sediments from Yellow River have very large sorption capacity for copper.The pH and physicochemical property of the sediments are of significance to sorption.Copper sorption with low copper concentration was highly correlated with pH.Meanwhile,the effect of physicochemical property of sediments on sorption were significant with high copper concentration,and the carbonate content was the dominant factor.The increase of sediment concentration resulted in increasing sorption capacity presumably due to the companion rise of pH.