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《Geoscience》 2018-01
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Distribution,Source Identification and Risk Assessment of Heavy Metals in Topsoil of Huairou District in Beijing

LI Ping;HUANG Yong;LIN Yun;HUA Peixue;YUAN Guoli;Shool of Earth Sciences and Resources,China University of Geosciences;Beijing Institute of Geo-Exploration Technology;  
At the agricultural area in the southeast of Huairou District in Beijing,977 topsoil samples were collected,and 8 heavy metals in samples were analyzed,including Cr,V,Ni,As,Pb,Zn,Hg and Cd. The spatial distribution characteristics of these heavy metals were clearly illustrated by geochemical mapping. By applying the methods of multivariate statistics analysis,the concentration distributions of these heavy metals were dedicated,and the sources of them were determined,and risk assessment for them was also performed. The results show that the elements of Cr,V,Ni and As are mainly originated from soils parent materials. On the other hand,the elements of Pb,Zn and Hg are greatly influenced by the human activities,such as traffic and atmospheric deposition. Differently,Cd is mainly affected by inorganic fertilizer. The environmental risk of 8 heavy metals is assessed by Hakanson method,and all above heavy metals except Cd show a relatively low pollutionrisk. So,our study provides a significant reference for the risk assessment of agricultural soils and the future land-using plan at the area of Huairou District.
【Fund】: 中央高校基础研究基金项目(2652017239 2652017240);; 中国地质大学生物地质及环境地质国家重点实验室项目(GBL21405);; 北京市政府公益性项目“北京城市地质土壤调查与评价”(1041STC00611)
【CateGory Index】: X53;X825
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