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本文测定了磨刀门河口76个表层沉积物样品中Zn、Cu、Mn、Pb、Ni、Cr、Cd7种元素的含量,并对其分布特征、来源与沉积环境的影响、风险评价等进行分析。结果表明,研究区域中的Cu、Mn、Ni、Pb、Cd元素主要源于磨刀门河口的输入,Zn和Cr则具有多种来源;沉积物粒度特征是影响Cu、Mn、Ni、Pb、Cr5种元素分布的主控因素;研究区潜在生态风险整体情况较为严重,表层沉积物的生态风险的主要由Cd元素引起。
In this paper, the contents of seven elements, Zn, Cu, Mn, Pb, Ni, Cr and Cd, in 76 surface sediment samples from the Modaomen estuary were measured, and their distribution characteristics, source and sedimentary environment, and risk assessment were analyzed . The results show that Cu, Mn, Ni, Pb and Cd in the study area mainly originate from the input of Modaomen estuary, while Zn and Cr have multiple sources. Sediment grain size is a key factor affecting Cu, Mn, Ni, Pb, Cr5 elements of the distribution of the main controlling factors; potential ecological risk in the study area overall situation is more serious, the ecological risk of surface sediments mainly caused by Cd.