湘江三角洲沉积物元素重金属污染地球化学特征  

Elemental Geochemical Characteristics of the Sediments of Xiangjiang River Estuary,Hunan Province,China

作　　者：尹春艳[1] 于一尊[2] 唐晓燕[1] 杨广[1] 余昌训[1] 刘茜[1] 杨克苏[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 [2]江西省科学院生物资源研究所,江西南昌330029

出　　处：《江西科学》2010年第2期210-215,共6页Jiangxi Science

基　　金：环境地球化学国家重点实验室开放课题(编号:SKLE6031);湖南省自然科学基金重点项目(编号:07A309);湖南省教育厅重点项目(编号:07A039)

摘　　要：在湘江河口三角洲采集4个沉积柱芯,得到沉积物样品94份,测定了各样品中Cd、Sc、Sn、Sb、Zn等16种元素的含量,并利用地累积指数法和主成分分析法对沉积物中的重金属污染状况进行分析和评价。结果表明,湘江河口三角洲沉积物重金属污染最严重的为Cd,其次为Sn、Sb、Zn、Pb污染;各采样点沉积物中重金属的复合污染状况为:Q>W>XY>QS,表明入湖河段的沉积物重金属含量要比湖盆的沉积物重金属污染程度更为严重;W、XY、Q采样点的Sc、V、Co、Mo、Pb、U主要受第1主成分的支配,而在QS采样点第1主成分的因子变量在这些重金属元素的浓度上有较高的负载荷,说明Sc、V、Co、Mo、Pb、U主要来自于湘江水。Four sediment cores were collected in the estuarine delta of Xiangjiang River,which contains 94 sediment samples.Concentration of 16 heavy metal elements in the sediments,including Cd,Sc,Sn,Sb,and Zn,were measured.Methods of index geoaccumulation and principal components analysis were applied to analyze the heavy metal pollution.The results show that among those heavy metal pollutions in the estuarine delta,Cd ranked first,with Sn,Sb,Zn,and Pb in the next place.The decreasing order of the pollution in four sampling place was QWXYQS,which shows the heavy metal pollution was aggravated from river to lake.Sc,V,Co,Mo,Pb,and U have greater loadings on the PC1s of the sampling place W,XY,and Q,while their loading on PC1 of QS are negative.It shows the pollution of the six heavy metals came mainly from Xiangjiang River.

关 键 词：重金属污染 沉积物 湘江 污染评价 地累积指数 主成分分析 

分 类 号：X53[环境科学与工程—环境工程]