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 Bilateral Highway

[目的]评价公路两侧土壤中重金属的污染程度。[方法]用微波消解ICP-AES法测定公路两侧土壤中镉、铬、镍、铅和铜的含量,并利用地积累指数法评价土壤受镉、铬、镍、铅和铜5种重金属的污染程度。[结果]结果表明,采样点距公路直线距离越大,土壤中镉、铬、镍、铅和铜的含量越低,铬、镍、铅和铜的含量均有明显上升,但未超出国家土壤环境质量二级标准。镉污染严重,超出国家土壤环境质量三级标准。[结论]该研究结果为公路两侧土壤重金属污染的治理提供科学依据。

[ Objective] The purpose of this research was to review the heavy metals pollution degree in soils of bilateral highway. [ Method] Cd,Cr.Ni,Pb and Cu in soils of bilateral highway were determined with microwave digestion and ICP-AES,and Cd, Cr, Ni, Pb and Cu pollution degree were appraised by using terra accumulate exponential method. [ Result] The results indicated that along with interval from highway straight line distance were more and more, the content of the Cd, Cr, Ni, Pb and the Cu were less and less in the sample point＇s soil, the content of Cr, Ni, Pb and Cu all had obvious ascension,but it did not overstep the second class standard of the environment quality of soil. Cd pollution severity oversteped the third class standard of the environment quality of soil. [ Conclusion] This research will provide the scientific references for fathering heavy metals pollution in soils of bilateral highway.