College of Marine Science and Engineering, Nanjing Normal University, Nanjing 210023, China.
Mar Pollut Bull. 2021 Feb;163:111954. doi: 10.1016/j.marpolbul.2020.111954. Epub 2021 Jan 10.
In this study, the characteristics and spatial distribution of heavy metal pollution in the surface sediments of Haizhou Bay, one of the largest bays in China, were investigated. The potential ecological risks posed by seven heavy metals were analyzed by using the Hakanson comprehensive pollution index and geoaccumulation index (Igeo). A correlation matrix map was applied to explore the relationships between the seven heavy metals and environmental elements. The results showed that the contents of heavy metals in the southern area of Haizhou Bay are high, whereas those in the northern area are low. The results of the pollution assessment of heavy metals were largely consistent between the Igeo method and the potential ecological risk index method. The seven heavy metals ranked in descending order of potential ecological risk coefficient as follows: Hg, Cd, As, Pb, Cu, Cr and Zn. The environmental quality assessment showed that Hg is the main heavy metal pollutant in surface sediments in Haizhou Bay, and some stations have reached a high pollution level and should receive more attention.
本研究调查了中国最大海湾之一——海州湾表层沉积物中重金属的特征和空间分布。利用 Hakanson 综合污染指数和地积累指数（Igeo）分析了七种重金属的潜在生态风险。应用相关矩阵图探讨了七种重金属与环境要素之间的关系。结果表明，海州湾南部地区重金属含量较高，而北部地区含量较低。Igeo 法和潜在生态风险指数法的重金属污染评价结果基本一致。七种重金属的潜在生态风险系数按降序排列如下：Hg、Cd、As、Pb、Cu、Cr 和 Zn。环境质量评价表明，Hg 是海州湾表层沉积物中的主要重金属污染物，部分站位已达到高污染水平，应引起更多关注。
