湘江沉积物重金属元素环境地球化学特征  

ENVIRONMENTAL-GEOCHEMICAL CHARACTERISTICS OF HEAVY METALS IN SEDIMENTS FROM THE XIANG RIVER

作　　者：唐晓燕[1] 彭渤[1] 余昌训[1] 胡东生[1] 庞西磊[1] 杨广[1] 尹春艳[1] 

机构地区：[1]湖南师范大学资源与环境科学学院,湖南长沙410081

出　　处：《云南地理环境研究》2008年第3期26-32,共7页Yunnan Geographic Environment Research

基　　金：湖南省自然科学基金重点项目"洞庭湖沉积物重金属污染的地球化学示踪"(07A309)资助

摘　　要：在前人研究的基础上,对湘江干流河道表层沉积物及入湖三角洲地区沉积物中的重金属富集特征、赋存状态等进行了总结;对湘江沉积物中重金属的污染来源进行了分析,湘江沉积物重金属的富集种类主要受流域富集矿产的控制,重金属污染主要是人为活动导致的点源污染集中和高排放引起的;另外,运用Hakanson潜在生态风险指数和地累积指数对湘江沉积物中重金属的潜在生态风险和污染程度进行了评价,结果显示Cd、Pb、As、Zn、Cu、Hg等重金属在湘江沉积物中存在不同程度的污染,其中Cd、Hg、As、Pb、Cu污染严重同时潜在生态危害也大,应引起重视。Based on the former studies, the characteristic and forms of heavy metals in surface sediments of Xiang River and its delta connecting Dongting Lake had been summarized in this paper. By analyzing the source of heavy metals, it was proved that species of heavy metals are controlled by enrichment deposit of drainage area and those heavy metal pollutions were mainly caused by human activities. The results of potential ecological risk index of Hakanson and geo accumulation index presented that the main pollution elements were Cd. Pb. As. Zn. Cu. Hg, Cd. Hg. As. Pb. Cu have a high Ei and high Igeo level respectively, so these elements should be given more attention.

关 键 词：湘江流域 重金属 沉积物 环境地球化学 

分 类 号：X522[环境科学与工程—环境工程]