岩溶地区公路路坡重金属污染垂向变化特征研究

随着公路交通业的发展,汽车尾气对周围环境的影响也越来越大,公路边坡污染问题也越来越受重视。对于岩溶区路侧的横向污染变化,在其它文献中已有报到,本文着重研究岩溶地区路坡垂向上汽车尾气的重金属污染。文章以贵新路为例,分析了公路边坡土壤重金属污染物的垂向污染状况和变化规律,得出了路坡重金属污染的富集带约分布在距地面5m处,随着高度的增加污染物含量减少,但到了路坡坡顶又出现小幅增高现象,这有可能与汽车尾气卷扬和淀积效应有关。

STUDY ON VERTICAL CHANGE OF HIGHWAY SIDE SLOPE POLLUTION WITH HEAVY METAL IN KARST AREA

With the development of road traffic business,the traffic pollution gets more and more serious,and the impact on surrounding environment of the highway larger and larger.There has been some report about highway pollution change in horizontal direction in other papers.This paper focuses on heavy mental pollution to the roadside slope in vertical direction in karst area.Taking Guixin highway as a case,the pollution state and its change regularity in vertical direction are analyzed,which proves that the heavy mental pollutant enriches within 5m under the ground and decreases towards ground surface but increases near the surface slightly that may have something to do with the convoluting and accumulating effects of tail gas.