铜陵相思河重金属污染的潜在生态危害评价  

Heavy metal pollution in Xiangsi River of Tongling City and assessment of its potential ecological risk

作　　者：徐晓春[1] 牛杏杏[1] 王美琴[1] 谢巧勤[1] 黄界颖[1] 陈莉薇[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2011年第1期128-131,136,共5页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省自然科学基金资助项目(090415204)

摘　　要：凤凰山铜矿和新桥硫铁矿的采矿活动对铜陵市相思河水质造成较为严重的重金属污染,文章根据重金属环境化学行为特点,应用沉积学原理,对相思河的重金属污染情况进行了调查和研究,从相思河上游到下游共取沉积物样7个,采用潜在危害指数法对沉积物中重金属进行了评价。结果表明,相思河中下游受到的重金属污染明显比上游严重,危害指数从大至小的排列顺序为S7>S6>S4>S5>S3>S1>S2;相思河重金属生态危害由大到小的顺序为Cd>Cu>As>Pb>Zn>Cr,Cu和Cd的富集系数和生态危害高;受污染的河水通过地表径流、食物链等各种途径会对附近居民的身体健康构成威胁。Heavy metal pollution of Xiangsi River in Tongling City is caused by Fenghuangshan copper mine and Xinqiao pyrite mine. Seven sediment samples were taken from upriver to downriver zones to investigate the heavy metal pollution of Xiangsi River based on sedimentological theory and behavior characteristics of environmental chemistry of heavy metals. The heavy metals in these sediment samples were assessed by the method of potential ecological risk index. The results show that the heavy metal pollution in middleriver and downriver zones is much more serious than that in the upriver zone. The order of pollution degree of the seven samples is S7〉S6〉S4〉S5〉S3〉S1〉S2 and the order of ecological risk degree of the heavy metals in these sediments is Cd〉Cu〉As〉Pb〉Zn〉Cr. Both the enrichment coefficient and ecological risk of Cd and Cu are very high. The polluted water of Xiangsi River may threaten the health of neighbouring people through surface flowing and food chains.

关 键 词：重金属污染 生态危害评价 沉积物 相思河 铜陵 

分 类 号：X820.3[环境科学与工程—环境工程]