HEAVY METAL POLLUTION IN ROADSIDE SOIL AND DUST ALONG G312 HIGHWAY AND IT'S INFLUENCING FACTORS

With the sample of roadside soil and dust from service areas along G312 highway,the current situation of heavy metal contamination and the influencing factors were studied.The pollutions of Pb,Zn,Cu in roadside soil was high,while,Ni,Mn,Cr pollutions was low.The contents of Pb,Zn in Liangtian and Baoshan-road are the highest,and are in level of serious pollution to most serious pollution.Liuyuan take the second place,with Pb,Zn in level of in the mediate pollution.However,heavy metals in the other places are all under the level of moderate pollution.The contents of heavy metals in the window dust from many service areas are higher than in roadside soil.The Igeo value of Zn in places of Sanmenxia,Pingdingshan,Beilongkou,Liangtian are all 10,in the level of most serious pollution.Ni pollution is low,Igeo 2.Pollution sources of the Pb,Cr in the roadside soil and dust of service areas along G312 highway were suspectal to be the same:same vehicle exhaust and friction chippings out of the tyre.Other elements may come from other pullution sources.Vehicle activity in the key influencing factor for heavy metal contamination.