凤县金矿周边河道沉积物中重金属潜在生态危害评价
Potential Ecological Risk Assessment of Heavy Metals in River Sediment around Feng County
张旭1
作者信息
- 1. 中煤科工集团西安研究院有限公司,陕西西安 710054
- 折叠
摘要
[目的]评价凤县金矿周边河道沉积物中重金属的潜在生态危害.[方法]沿金矿周边地段采集河道表层沉积物,测定分析沉积物内重金属含量,采用Hakanson潜在生态危害指数法分析沉积物中重金属的危害程度.[结果]金矿周边河道地段大部分区域的重金属潜在生态危害属于轻度危害,产生危害的重金属为Pb、Hg、Cu、Cd、As.个别采样点出现中度污染,产生中度污染危害的重金属是Hg、Cd、Cu.综合潜在生态危害指数(RI)表明,河道沉积物内重金属污染程度总体上属于轻度生态危害,3段河道重金属污染危害程度由强至弱依次为三台山金矿、庞家河金矿、小裕河金矿.[结论]该研究可为矿区周边河道重金属治理提供科学依据.
Abstract
[Objective]To evaluate the potential ecological risk of heavy metals in river sediment around Feng County.[Method]Based on the data of heavy metals in the surface sediments from three rivers near gold mine, the potential ecological risk of heavy metals were analyzed and assessed by using the method of potential ecological risk indices presented by Hakanson.[Result]The results showed that the contamination of surface sediments from rivers near gold mine was slight, and the main factor caused ecological hazard was mercury, cadmium and copper following by lead and arsenic.The comprehensive index of potential ecological risk showed the contamination level of surface sediments was slight ecological risk,the harm degree of heavy metal pollution in Santaishan gold mine,Pangjiahe and Xiaoyuhe decreased successively.[Conclusion]The study can provide reference for the treatment of heavy metal pollution in the surrounding rivers of mining area.
关键词
河道沉积物/重金属/潜在生态风险评价/凤县Key words
River sediments/Heavy metals/Assessment of potential ecological risk/Fengxian引用本文复制引用
出版年
2017
国家科技期刊平台
NSTL
维普
万方数据