開封市化肥河污灌區(qū)土壤重金屬潛在生態(tài)風(fēng)險評價

摘要： 以開封市化肥河污灌區(qū)為例,采用潛在生態(tài)風(fēng)險指數(shù)法對土壤重金屬污染進(jìn)行了生態(tài)風(fēng)險評價.結(jié)果表明:單個重金屬的潛在生態(tài)風(fēng)險以Cd最為嚴(yán)重,E_cd變化在300～1086之間,各樣點(diǎn)均達(dá)到極度生態(tài)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(tài)風(fēng)險的貢獻(xiàn)率最高,是構(gòu)成潛在生態(tài)風(fēng)險的主要因子.污灌區(qū)土壤重金屬綜合生態(tài)風(fēng)險指數(shù)為608.51,達(dá)到很強(qiáng)生態(tài)危害程度.與污灌區(qū)相比,對照區(qū)3個樣點(diǎn)的生態(tài)總風(fēng)險程度相對較輕,但也存在著比較明顯的鎘風(fēng)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(xué)資源與環(huán)境研究所,河南,開封,475004)

韓晉仙,HAN Jin-xian(山西財經(jīng)大學(xué)環(huán)境經(jīng)濟(jì)系,山西,太原,030006) 

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

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