长江三角洲经济区海域沉积物重金属分布特征及环境质量评价  

DISTRIBUTION PATTERN OF HEAVY METALS IN THE SURFACE SEDIMENTS AND ENVIRONMENT QUALITY EVALUATION FOR THE YANGTZE RIVER DELTAIC ECONOMIC ZONE

作　　者：刘珊珊[1,2,3] 张勇[1,2,3] 龚淑云[4] 于开宁[1] 林曼曼 毕世普[2,3] 

机构地区：[1]石家庄经济学院,石家庄050031 [2]国土资源部海洋油气资源和环境地质重点实验室,青岛266071 [3]青岛海洋地质研究所,青岛266071 [4]深圳市地质局,深圳518023

出　　处：《海洋地质与第四纪地质》2013年第5期63-71,共9页Marine Geology & Quaternary Geology

基　　金：沿海经济带多目标区域地球化学系列图件编制(1210820508);1:25万青岛幅海洋区域地质调查项目(试点)(GZH200900501)

摘　　要：基于长三角经济区1 871个近海海域表层沉积物地球化学分析数据,结合相关地质资料,阐述了该区海域沉积物重金属含量及分布规律。结果表明,研究区表层沉积物重金属平均含量:As为8.12×10-6、Cd为101.53×10-9、Cr为74.79×10-6、Cu为19.33×10-6、Hg为34.87×10-9、Pb为22.31×10-6、Zn为67.13×10-6;空间分布上,元素含量从象山到乐清沿岸普遍偏高,而最低含量区见于江苏海岸;以综合指数法进行环境质量评价结果显示,重污染区分布在长江口河道内,轻污染分布在长江口附近海域、宁波-温州附近海域,清洁区主要分布在苏北海域。This paper, based on the 1871 of geochemical data of surface sediments and other geological da- ta, deals with the contents and distribution pattern of heavy metals in the Yangtze River Delta Economic Zone. The results show that, in the surface sediments of the study area, the average contents of As, Cd, Cr, Cu, Hg, Pb, Zn are 8.12 ~10-6, 101.53X10 9, 74.79X10-6, 19.33X10 6, 34.87X10-9, 22.31X 10-G , and 67.13X 10 Grespectively. The higher values of heavy metal elements appear in the area from the Xiangshan to the Yueqing Bay, while the lower values occur along the Jiangsu coast. The comprehensive index method was adopted for environmental quality assessment. It is revealed that the heavily polluted at- ea is located along the channel of the Yangtze River, while slightly polluted area is near the Yangtze River Estuary and the area off Ningbo and Wenzhou. The area along the Jiangsu coat is rather clean.

关 键 词：沉积物 重金属 环境评价 长江三角洲经济区 

分 类 号：P736.2[天文地球—海洋地质]