西安市公园土壤重金属元素含量水平及风险评价

利用X-Ray荧光光谱仪对西安市城市公园表层土壤的Pb、Cu、Zn、Cr、Mn、As的质量分数进行了分析,阐明了这几种重金属元素的分布特征,并用内梅罗综合污染指数法和潜在生态风险指数法对其进行了评价.结果表明,As在个别公园呈现富积;Zn和Mn普遍存在一定程度的富积;Cu、Pb在公园内的累积程度相对较大.西安市公园土壤重金属元素属于中等污染,其潜在生态风险处于中等水平,各重金属元素的潜在生态风险系数大小顺序为Pb=As>Cu>Cr>Mn>Zn.

Heavy Metals Content and Ecological Risk Assessment of Soil in Xi'an Urban Parks

The concentration of Pb,Cu,Zn,Cr,Mn and As in surface soil collected from Xi'an urban parks was analyzed by using X-Ray fluorescence spectrometry.The contamination level and ecological risk of heavy metals in soils were assessed by the synthetic pollution index method and potential ecological risk index method.The results show that As is enriched in individual parks,while Zn and Mn are universal enrichment and the accumulation coefficients of Cu and Pb are relatively high in all parks.The contamination leve...