Evaluation on environmental quality of heavy metals in Shouguang City, Shandong Province | 山东省寿光市土壤重金属环境质量评价

Chino. 对山东省蔬菜种植基地寿光市土壤环境质量进行调查，并利用单因子指数法和内梅罗指数法对表层土壤中的重金属含量进行单因子评价与综合评价，最后根据综合评价结果，利用Aregis的地统计分析模块做图。结果表明：寿光市表层土壤中重金属含量的变异系数除汞元素达到中等的变异外，其余7种元素的变异系数均较小，8种重金属元素的含量均不符合标准的正态分布。Zn、Pb、As和Hg4种元素单项污染指数P。值均小于1，其余4种元素（Cu、Cd、Cr、Ni）分别有4、1、1、52个样点的Pi值大于1，分别占总样点数的0．68％、0．17％、0．17％和8．7％。寿光市土壤环境质量的内梅罗指数计算结果为0．35―1．33，平均值为0．94。寿光市表层土壤约有97．7％的样点属于清洁或尚清洁的水平，仅有2．3％的样点处于轻度污染的级别。综合评价结果表明：寿光市表层土壤环境质量较好，符合无公害蔬菜种植的要求。[著者文摘]

Inglés. Soil environmental quality surveys of Shouguang vegetable plantation soils of Shandong Province were performed , and the surface soil environmental quality was evaluated though single factor method and the comprehensive evaluation method. The results showed that： the contents＇ coefficient variation of the elements were relatively small except the Hg reached the medium variation, the content of every element in soil didn＇ t accord to the standard normal distribution. The individual pollution index values （P~） of Zn, Pb, As and Hg were lower than 1, about the remaining four elements （ Cu, Cd, Cr, Ni）, there were 4,1, l, 52 samples whose value exceeded 1 and the ratios of which were 0.68 , 0.17, 0.17 and 8.7 percent respectively. The comprehensive evaluation results showed that the Nemerow index was in the range of 0.35 to 1.33, and the average was 0.94. 97.7 percent of the samples were clean or comparatively clean and just 2.3 percent of the samples were slightly contaminated. It suggested that the environmental quality of Shouguang surface soil is quite clean and safe to meet the requirement of developing green vegetables.