应用地积累指数法评价淮河沉积物重金属污染

测定了淮河安徽段表层沉积物中重金属的含量，采用地积累指数（Igeo）法对沉积物中典型重金属污染物进行了评价。结果表明，淮河安徽段沉积物中重金属总量及富集程度不高，重金属地积累指数分级多在0～2之间，属于无污染至中度污染水平，各重金属污染程度从高到低依次为：Zn〉Cu〉Pb〉As〉Cr；在研究的6个断面中，吴家渡断面受重金属污染的程度最大、田家庵断面次之、王家坝端面最小。

Application of the Index of Geoaccumulation to Evaluate Heavy Metal Pollution in Sediments in the Anhui Section of the Huaihe River

Heavy metals in surface sediments from Huaihe River （Anhui section）were investigated. The method of index of geo - accumulation was used to assess the heavy metals. The results shows that the contamination level of surface sediments in the Anhui section of the Huaihe river are not high, the index of geoaccumulation （Igeo） classify are most between 0 -2, the contamination levels are from non to moderate. Various heavy metals pollution degree from high to low in turn is ： Zn 〉 Cu 〉 Pb 〉 As 〉 Cr. In the study in six sections, Wujiadu section of heavymetal contamination in the greatest extent, Tianjiaan is next, Wangjiaba is minimal.