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本文阐述了长江口表层沉积物及其酸可溶相和间隙水中Pb、Cu和Cd的分布,分析了它们与环境参数的关系,发现它们的多数与沉积物的粒度、有机质、氧化铁和粘土矿物的含量之间有较好的相关性,与Eh、pH也有一定的关系。间隙水和沉积物之间存在着准平衡关系。Pb、Cu在两相间的分配主要受氧化铁和有机质的吸附-解吸和沉淀-溶解过程所控制,Cd的分配主要受CdS的沉淀-溶解过程所控制。
In this paper, the distributions of Pb, Cu and Cd in surface sediments and their acid-soluble and interstitial water of the Yangtze Estuary are described. Their relationships with environmental parameters are analyzed. It is found that most of them are related to sediment grain size, organic matter, iron oxide and clay Mineral content has a good correlation between, and Eh, pH also have a certain relationship. There is a quasi-equilibrium relationship between interstitial water and sediments. The distribution of Pb and Cu in the two phases is mainly controlled by the adsorption-desorption and precipitation-dissolution processes of ferric oxide and organic matter. The distribution of Cd is mainly controlled by the precipitation-dissolution process of CdS.