长江口及其邻近海域表层沉积物中锑的地球化学特征与环境风险评价研究  

Geochemical Characteristics and Environmental Risk Assessment of Antimony in Surface Sediments from the Yangtze River Estuary and Its Adjacent Sea Area

作　　者：杜文[1] 张霄宇[1] 葛冰 Du Wen;Zhang Xiaoyu;Ge Bing(School of Earth Sciences,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学地球科学学院

出　　处：《科技通报》2019年第11期193-200,213,共9页Bulletin of Science and Technology

基　　金：国家自然科学基金(41773005;40706057);国家海洋局第二海洋研究所基本科研业务费专项(JG1616;JG1312);国家海洋局第二海洋研究所基本科研业务费专项(JG1616;JG1312);海洋公益性行业科研专项(201505008-2);海洋公益性行业科研专项(201505008-2)

摘　　要：锑是一个可长距离输送的全球性有毒元素,但锑在河口不同环境要素中的迁移、转化以及其地球化学行为特征最近才引起国际社会的关注。为了揭示锑元素在长江口及其邻近海域的富集程度、物质来源及其潜在生态环境影响,本次研究以长江口及邻近海域29. 5°~32. 5°N,121°~124. 5°E区域内表层沉积物样品为研究对象,基于沉积物全样Al、Ca、Si、Ni等主量元素,以及Cd、Cr、Cu、Pb、Sb、Sr、Zn等微量元素的含量检测分析,并采用地积累指数和潜在生态风险指数展开了锑元素在研究海域表层沉积物中累积程度和潜在生态风险。研究结果表明研究区内表层沉积物中的锑含量范围为0. 44~4. 41μg/g,平均值为1. 15μg/g;已达到了偏中度污染水平,并且具有着较高的潜在生态风险,尤其是在长江入海口南支与杭州湾内锑元素具有很高的潜在生态风险。通过主成分分析方法认为锑元素的主要物质来源为长江径流输入以及人为活动输入。Antimony is a global toxic element that can be transported over long distances.However,the study on the migration,transformation and geochemical behavior in different environmental elements in the estuary has only attracted the attention worldwide recently.In order to reveal the enrichment degree,material sources and potential ecological hazards of antimony in the Yangtze Estuary and its adjacent waters;This study uses surface sediment samples from the 29.5°~32.5°N,121°~124.5°E region of the Yangtze River estuary and adjacent waters.Based on the determination of content of main elements such as Al,Ca,Si,Ni,and trace elements such as Cd,Cr,Cu,Pb,Sb,Sr,Zn,the accumulation index and potential ecological risk index of antimony in the surface sediments are calculated.The results show that the content of antimony in the surface sediments in the study area ranges from 0.44 to 4.41μg/g,with an average of 1.15μg/g.The study area has reached a moderately moderate level of pollution and has a high potential ecological risk.Especially in the south branch of the Yangtze River estuary and the interior of the Hangzhou Bay,there is a high potential ecological risk.Principal component analysis method is considered to be the main material source of strontium element for the Yangtze River runoff input and human activity input.

关 键 词：长江口及其邻近海域 表层沉积物 锑元素 潜在生态风险 

分 类 号：X55[环境科学与工程—环境工程] P736.41[天文地球—海洋地质]