淮安市某垃圾填埋场重金属污染现状调查

Present Situation Investigation and Assessment of Heavy Metal Pollution for a Municipal Landfill in Huaian

对淮安市某垃圾填埋场土壤中13个采样点中典型重金属Cr、Pb、As、Hg、Cd、Cu、Zn的含量进行了调查,采用单因子污染指数、综合污染指数及Hakanson潜在生态风险指数法评价了土壤中典型重金属对其所在环境的污染程度,对周围环境造成的潜在生态风险影响。结果表明,研究区域内重金属含量均未超过《土壤环境质量标准》(GB 15618-1995)二级标准。主要的潜在生态风险因子为As,潜在生态风险因子大小顺序为As>Hg>Cd>Cu>Cr>Pb>Zn。

The situation and distribution of heavy metal pollution were investigated in the soil of the Municipal landfill in Huaian, Through analyzing the contents of the typical heavy metal pollutants （Cr,Pb,As,Hg,Cd,Cu,Zn）in the soil of 13 sample sites.The potential influences around environment involving the heavy metals were evaluated by the ecological risk index of Hakason ecological risk,single factor contamination index and comprehensive contamination index.The results showed that none of heavy metal in the studied region had overrun the Grade II of national Environmental Quality Standard for Soil （GB 15618 -95）.The major factor of potential ecological risk was As,and the order of the potential ecological risks was As＆gt;Hg＆gt;Cd＆gt;Cu＆gt;Cr＆gt;Pb＆gt;Zn.