汽车尾气中铅在两侧土壤中的分布规律研究

Research of Lead Distributed Rule in Soils on Both Two Sides of Road

对公路两侧土壤中铅的分布规律进行了研究,得出公路两侧土壤中铅的含量与距公路边沿的垂直距离分布规律:公路两侧土壤中铅含量总的变化趋势是随距公路边沿垂直距离的增加而逐渐降低,但公路旁开阔土地上土壤中铅含量是先随距离的增加出现一高峰值,然后随距离的增加而逐渐降低。同时得出公路两侧铅的含量在土壤中的铅直分布规律为:土壤中铅含量随土壤铅直深度的增加而降低,表层土中的铅含量比深层土中的铅含量显著要高。也对车流量与土壤中铅的累积量的关系进行了讨论,发现土壤中铅含量随车流量的增加而增加。

This artical have conducted the lead distributed rule research regarding in the soils of the roads＇ two sides,obtained that in the soils of the roads＇ two sides the lead content distributed rule to the vertical range being apart from the road border is that： In the soils the lead content drops gradually along with the distance increasing.But in the abierto areas nearby the roads,the lead content in the soils firstly appears a crest value along with the distance increasing,then reduces gradually along with the distance increasing.At the same time we obtain that in the soils of the roads＇ two sides the lead content plumb distributed rule is that： In the soils the lead content reduces along with the soil plumb depth increasing,in the regolith the lead content is remarkable higher than the lead content in deep earth.We have also carried on discussions on the relations to the lead cumulant in the soils and the traffic flow magnitude.We discover that in the soils the lead content current capacity increases along with the increasing of vehicles.