王晨;曾祥英;于志强;盛国英;傅家谟;

• 1:中国科学院广州地球化学研究所有机地球化学国家重点实验室广东省环境资源利用与保护重点实验室
• 2:中国科学院大学

摘要(Abstract)：

湘江是我国重金属污染最重的河流之一。为了更全面了解湘江衡阳段表层沉积物重金属污染现状及其潜在生态风险,在前期相关研究基础上,分析了重金属Tl及其他4种重金属(Mn、Co、Ni和V)的含量水平和分布特征,并采用地累积指数法和潜在生态风险指数法对沉积物中重金属污染现状和潜在生态风险进行了评价。结果表明,湘江衡阳段表层沉积物中Tl和Mn有一定程度的累积和污染,其含量分别为0.12～2.09mg·kg-1和234～4580mg·kg-1。由于Tl具有较强的毒性响应,其潜在生态风险不容忽视。综合前期相关研究结果,研究区域中10种重金属总潜在生态风险指数(RI)为27.8～6266,约70%采样点具有重度生态风险,其主要风险来源于Cd和Tl。

关键词(KeyWords)： 湘江衡阳段;沉积物;铊;地累积指数法;潜在生态风险指数法

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项(2009ZX07528-002-04)

作者(Author): 王晨;曾祥英;于志强;盛国英;傅家谟;

Email:

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