【摘要】 采用地累积指数、污染负荷指数和潜在生态风险指数对新疆民丰县85组农田表层土壤样品中Cd、Hg、As、Pb、Cr、Cu、Ni、Zn八种重金属元素的含量和污染程度进行评价。结果表明:民丰县农田表层土壤中重金属Cd、Hg、Cr、Ni元素的含量是新疆土壤背景值的1.147倍、1.124倍、1.116倍、1.041倍;Pb、Zn、Ni、Cu、As元素之间呈现不同程度的显著相关性。地累积指数从大到小依次为As、Cd、Cr、Cu、Zn、Ni、Pb、Hg;土壤重金属的污染负荷指数PLI平均值为0.1268,属于无污染程度。土壤重金属综合潜在生态风险指数均值为13.828,属于轻微生态风险。民丰县农田土壤环境适宜耕种,农产品安全隐患概率极低。更多还原

【Abstract】 The contents and pollution degrees of Cd, Hg, As, Pb, Cr, Cu, Ni and Zn in 85 samples of Minfeng county in Xinjiang were evaluated by index of geo-accumulation, pollution load index and potential ecological risk index. The results showed that the contents of Cd, Hg, Cr and Ni in the soil of Minfeng county are 1.147, 1.124, 1.116 and 1.041 times higher than the soil background values in Xinjiang; there are significant correlations among different levels of heavy metals in addition to few heavy metals. The index of geo-accumulation from high to low in order is: As>Cd>Cr>Cu>Zn>Ni>Pb>Hg, and the average PLI of the pollution load index is 0.1268. The average value of the comprehensive potential ecological risk index is 13.828, which is a slight ecological risk. The farmland soil environment of Minfeng county is suitable for cultivation, and the probability of potential safety hazard of agricultural products is very low.更多还原