太湖、巢湖沉积物中重金属污染的总量特征及其区域性差异  

THE CHARACTERISTICS AND REGIONAL DIFFERENCES OF HEAVY METAL CONTENTS IN THE SEDIMENTS OF TAIHU LAKE AND CHAOHU LAKE

作　　者：郑乐平[1,2] 刘玉梅[1] 钱显文[1] 施晓燕[1] 

机构地区：[1]上海大学环境科学与工程系,上海200444 [2]环境地球化学国家重点实验室,中国科学院地球化学研究所,贵阳550002

出　　处：《环境化学》2009年第6期883-888,共6页Environmental Chemistry

基　　金：国家自然科学基金项目(40573063);环境地球化学国家重点实验室开放课题联合资助

摘　　要：选取太湖、巢湖污染较为严重的区域为研究对象,采集季节性沉积物柱状样,以0.5cm的间距高精度分割样品,分析其中的Fe,Mn,Cu,Zn等重金属元素的含量,对沉积物中重金属的总量特征及季节性变化特征进行了分析,得出以下结论:太湖、巢湖沉积物中重金属的总量均呈现出Fe>Mn>Zn>Cu的特征,季节性变化幅度为Mn>Fe>Zn>Cu,重金属元素的地球化学性质对其季节性变化有很大的影响.同时,不同的区域背景差异(如元素丰度、污染状况等)导致了太湖、巢湖采样点沉积物中重金属元素季节性特征的差异.The heavily polluted areas were chose as the sampling sites of Taihu lake and Chaohu lake. The sediments were sampled in different seasons, with the samples separated at 0. 5cm intervals, Heavy metal contents （Fe, Mn, Cu, Zn）were analyzed, and the contents and seasonal variation characteristics of heavy metals were discussed. Comparisons were made between two lakes and the same lake in different sampling sites. The results show that the order of the heavy metal concentration is Fe 〉 Mn 〉 Zn 〉 Cu, and the order of variation range is Mn 〉 Fe 〉 Zn 〉 Cu. In large extent, the seasonal variation range is affected by the geochemical characteristics of the heavy metals. The different characteristics of heavy metal elements can be attributed to the regional differences and different pollution extents.

关 键 词：沉积物 重金属 总量特征 太湖 巢湖 

分 类 号：X524[环境科学与工程—环境工程]