淮北市蔬菜种植区土壤中重金属污染现状调查及评价

Investigation and Evaluation of Status Quo of Heavy Metal Pollution in Soil of Vegetable Planting of Huaibei

通过对淮北市周边三个主要蔬菜种植区的土壤进行采样测定,研究了土壤中Cd、Hg、As、Pb、Cr、Cu、Zn、Ni、Mn、Co、Ag、Sb、V和TI等14种重金属的含量,分别为0.171 mg·kg-1、0.051 mg·kg-1、14.0mg·kg-1、21.0 mg·kg-1、54.5 mg·kg-1、24.1 mg·kg-1、87.6 mg·kg-1、28.2 mg·kg-1、655mg·kg-1、13.5mg·kg-1、0.073mg·kg-1、0.80mg·kg-1、91.3mg·kg-1、0.73mg·kg-1。采用单因子污染指数和综合污染指数法对测定结果进行了评价,结果表明:Cd,Hg,As,Pb,Cr,Cu,Zn,Ni,Mn,Co,Ag和Sb污染指数均在0.7以下,属于清洁(安全)等级,符合无公害蔬菜种植基地要求。

Through study of soil samples collected from three vegetable planting areas, the article tests the content of 14 heavy metals in soil, including Cd, Hg, As, Pb, Cr, Cu, Zn, Ni, Mn, Co, Ag. Sb, V and TI. The results show that the contents of Cd, Hg, As, Pb, Cr, Cu, Zn, Ni, Mn, Co, Ag. Sb, V and TI in the soil samples are respectively0.171mg·kg-1, 0.05mg·kg-1, 14.0mg·kg-1, 21.0mg·kg-1, 54.5mg·kg-1, 24. 1mg·kg-1, 87.6mg·kg-1, 28.2mg·kg-1 , 655mg·kg-1, 13.5mg·kg-1 , 0. 073mg·kg-1 , 0.80mg·kg-1, 91.3mg·kg-1,0.73mg·kg-1. The article adopts single pollution index and integrated pollution index method to evaluate the results. The results indicate that the pollution indexes of Cd, Hg, As, Pb, Cr, Cu, Zn, Ni, Mn, Co, Ag and Sb are all below 0.7, which meet the requirement of pollution--free vegetable planting area.