開封市化肥河污灌區土壤重金屬潛在生態風險評價

摘要： 以開封市化肥河污灌區為例,采用潛在生態風險指數法對土壤重金屬污染進行了生態風險評價.結果表明:單個重金屬的潛在生態風險以Cd最為嚴重,E_cd變化在300～1086之間,各樣點均達到極度生態危害水平,其余重金屬均為輕度危害,危害程度依次為Cd>Cu>Pb>Zn>Ni.在研究的5種重金屬中,鎘元素對生態風險的貢獻率最高,是構成潛在生態風險的主要因子.污灌區土壤重金屬綜合生態風險指數為608.51,達到很強生態危害程度.與污灌區相比,對照區3個樣點的生態總風險程度相對較輕,但也存在著比較明顯的鎘風險. Abstract： The ecological risks of soil heavy metals in the sewage irrigated area of the Huafei River in Kaifeng City were discussed with the method of potential ecological risk index invented by Hakanson. The results showed that the soils have serious ecological risks of Cd with the single ecological risk index from 300 to 1086, and slight risks of Pb, Cu and Zn with the index less than 20. 42. The risk order of heavy metals is Cd>Cu>Pb>Zn>Ni. Among the five metals, Cd is the main risk factor in the sewage irrigated area. Integrated ecological risk index of soil heavy metals in the sewage irrigated area is 608. 51, which indicates that the soil ecological risk of the area is very serious. By comparing the sewage irrigated area with the control area, the integrated ecological risks of heavy metals, except for Cd, are relatively light in the control area. 作 者： 杜平    馬建華    韓晉仙    DU Ping    MA Jian-hua    HAN Jin-xian   作者單位： 杜平,馬建華,DU Ping,MA Jian-hua(河南大學資源與環境研究所,河南,開封,475004)

韓晉仙,HAN Jin-xian(山西財經大學環境經濟系,山西,太原,030006) 

期 刊： 地球與環境  ISTICPKU   Journal： EARTH AND ENVIRONMENT  年，卷(期)： 2009, 37(4)  分類號： X53 X820 X825  關鍵詞： 開封市    污灌區    土壤重金屬    潛在生態風險評價    Keywords： Kaifeng    sewage irrigated area    soil heavy metal    assessment of potential ecological risk   

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