Sources Apportionment of Roadside Soil Pollution of Heavy Metal Zinc
With the acceleration of highway construction and growing retain number of vehicles,the road traffic pollution besides industrial pollution is one of the main sources of heavy-metal pollution in soil,especially heavy-metal pollution to roadside soil,and among others,zinc(Zn)is one of the main heavy-metal pollutants.Previous studies mostly focused on the pollution characteristics,distribution rules and qualitative sources of Zn in roadside soil,but systematic analysis of the quanti-tative analysis is not enough,so it is difficult to provide effective support for the prevention and control of roadside soil heavy-metal pollution.In this study,with roadside soil,atmosphere dust-fall and pavement sediments being taken as the research objects,the values of Zn isotopes in roadside atmospheric dust-fall,pavement sediments,automobile tires and roadside soil were determined by using ICP-MS,and the sources of Zn pollution to roadside soil,and their contribution rate were quan-titatively analyzed by isotope tracer method.Consequently,it was showed that the wear of automobile tires contributed the greatest Zn pollution to the roadside soil,followed by the road sediments and the roadside atmospheric dust,and specifical-ly,in non-industrial areas the contribution of tires wear was in the range of 71％～77％,road sediments 12％～18％and atmo-spheric dustfall 10％～1 1％,while in industrial areas,the contribution of tire wear in the range of 65％～70％,road sediment 19％～24％and atmospheric dust-fall 10％～12％.It is expected that the result of the study could provide a basis for the pre-vention and control of Zn pollution in roadside soil.
万方数据
维普
