深圳湾水域中重金属在不同相间的分布特征

在深圳湾水域采集沉积物、上覆水和悬浮颗粒物样品开展重金属污染研究。结果表明，表层沉积物中金属浓度呈上升趋势，尤其是锌。湾内沉积物中锌、镉、钴和镍的可交换态比例明显高于湾外，体现了沿岸污染径流输入的影响。悬浮颗粒物与表层沉积物之间的物质交换和再分配导致两相间金属浓度显著相关，从湾内向湾外，铜、镍锌的浓度梯度在异相间表现出相似的空间变化模式。

Distribution of heavy metals among various phases in Shenzhen Bay

Sediment cores, suspended particles and overlying water were sampled in Shenzhen Bay. The results showed that metal concentrations elevated in the surface sediments, especially for Zn. The proportions of exchangeable Zn, Cd, Co and Ni in the inner bay were higher than in the outer bay, indicating the impacts of pollutant input along the bank. Material exchange and redistribution between suspended particles and surface sediments led to a significant correlation of metal concentrations at each sampling site. The spatial gradients of Cu, Ni and Zn concentrations in different phases exhibited similar variation patterns.