成灌高速公路两侧农田土壤重金属污染现状初步研究

目的]通过对成灌高速公路两侧农田土壤重金属的测定,初步评价其重金属污染情况。方法]采用原子吸收分光光度法、对成灌高速公路两侧农田土壤中Cu、Zn、Cd、Pb、Cr含量进行测定,然后参照国家《土壤环境质量标准》二级标准,采用单项污染指数法和综合污染指数法对土壤重金属污染进行评价。结果]成灌高速公路部分路段两侧农田土壤Cu、Zn、Cd超出国家《土壤环境质量标准》二级标准,Cu、Zn、Cd处于轻度污染状态,为主要污染元素;Pb、Cr未超出国家《土壤环境质量标准》二级标准,处于安全状态。结论]该研究为成灌高速公路农田土壤重金属污染的治理提供了科学依据。

A Preliminary Study on Farmland Soil Heavy Metals Pollution alongside the Chengguan Highway

Objective] Through determining farmland soil heavy metals alongside Chengguan highway,the pollution was evaluated.Method] The content of Cu,Zn,Cd,Pb and Cr was determined by using atomic absorption spectrophotometer.Then,according to Grade II of Quality Standards of Soil Environment,pollution of heavy metals on soil was evaluated by using single pollution index and comprehensive pollution index.Result] Farmland soil Cu,Zn and Cd in both sides of Chengguan highway exceed the Grade II of Quality Standards of Soil Environment,Pb and Cr were not exceeding.Conclusion] The study will provide scientific basis for heavy metal pollution control alongside Chengguan highway.