高速公路两侧土壤中重金属污染的测定和环境影响评价

Determination and environmental impact review on heavy metals pollution in soils of highway

以京珠高速信阳段路旁土壤为研究对象,在野外采样和实验室分析的基础上,评价公路两侧土壤中镉、铬、铅和铜等4种重金属的污染程度。结果表明,采样点距离公路直线距离越大,土壤中上述四种金属含量越低;土壤中铬、铜含量未超出《土壤环境质量标准》二级标准,而距公路一定距离内的镉、铅含量则超出该标准。

Author chooses the soil of the Xinyang section,part of the Beijing-Zhuhai expressway,as researching object.Basing on the field sampling and laboratory analysis,It evaluates the pollution level of four kinds of heavy metal in the soil of the both sides of the highways.The four kinds heavy metal are cadmium,lead,copper and chrome.It shows that the Straight-line distance of the samping point＇s from the expressway and the content of the four heavy metal in the soil inversely proportional to.At the same time,chromium and copper＇s content in the soil also under the secondary standard of the soil environment quality standards,but the content of cadmium and lead within a certain distance from the highway,beyond the standard.