应用潜在生态风险指数法评价滇池沉积物中的重金属污染

Application of the Potential Ecological Risk Index to Evaluate Heavy Metals Pollution in Dianchi Lake

测定了滇池8个断面表层沉积物中重金属(Cu、Zn、Pb及Cd),结果表明,除Cd外,Cu、Zn及Pb在沉积物中的含量较高,这几种元素的含量顺序为Zn>Cu>Pb>Cd。同时采用Hakanson指数法评价了沉积物中重金属生态风险,结果显示:滇池表层沉积物中重金属元素的潜在生态风险整体表现为轻微。其中海口西和观音山东断面总的重金属潜在生态风险指数最高。对于晖湾、观音山西、白渔口及海口西断面,Cu表现为首要的潜在生态风险因子;对于罗家营、观音山中及滇池南断面,Pb表现为首要的潜在生态风险因子;对于观音山东断面,Cd表现为首要潜在生态风险因子。

Determination of heavy metals(Cu,of Zn,Pb and Cd) of the surface sediments on the eight sections of Dianchi Lake,the results show,in addition to Cd,Cu,Zn and Pb in sediments with higher levels of content,the order of several elements is Zn> Cu> Pb> Cd.Meanwhile,it takes the Hakanson index method to evaluate the heavy metals ecological risk in the sediments,its results show that:the overall performance of the potential ecological risk of heavy metals in the surface sediments in Dianchi Lake is as mild.The overall heavy metal potential ecological risk index in the section of Haikou West and the Buddha Mountain east is highest.For Hui Wan,Buddha Mountain west,Baiyu port and Haikou West sections,Cu represents the most important and potential ecological risk factor.For Luojiaying,Buddha Mountain and Dianchi South sections,Pb represents the most important and potential ecological factor.For Buddha Mountain section,Cd represents the first important and potential ecological risk factor.