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中文摘要：
对某污灌区的土壤剖面进行采样分析,利用不同的评价方法进行评价,结果表明,土壤中金属元素Cr、As、HG、Cd、Cu、Pb、Ni、Zn和持久性有机污染物BHC、DDT含量有上升趋势,80%以上的表层土壤样品污染物含量超过土壤底层,85%以上的土壤样品污染物含量明显超过当地土壤的自然背景值.通过污染物在土壤中的残留模型预测,两种有机污染物和元素Cr、As、Hg、Cd、Cu会在土壤中累积,持续的污水灌溉可能使在土壤中累积的这些污染物进入地下水或食物链,对环境健康造成危害.
英文摘要：
Through soil profile sampling and with different evaluation methods, this paper assessed the contamination trend of heavy metals and POPs in a wastewater-irrigated area, The results showed that the concentrations of heavy metals Cr, As, Hg, Cd, Cu, Pb, Ni and Zn and of POPs, BHC and DDT in Soll had an increasing trend. 80 % or more topsoils had a higher contaminants concentration than subsoils, and the contaminants concentration in 85 % or more soil samples was surpassed their background value. The two POPs and heavy metals Cr, As, Hg, Cd and Cu could accumulate in soil, and continuous wastewater irrigation could make the accumulated contaminants migrate into groundwater and food chain, resulting in the hazard to environmental health.
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