现代地质2018，Vol.32Issue(1)：95-104,10.DOI:10.19657/j.geoscience.1000-8527.2018.01.09
北京市密云区农业土壤重金属元素地球化学特征及生态风险评价
Geochemical Characteristics and Risk Assessment of Heavy Metals in Agricultural Soils in Miyun District of Beijing
摘要
Abstract
One thousand and sixty-five surface soil samples were systematically collected at the agricultural area in the southwest of Miyun District of Beijing,and the concentration of 8 heavy metals in the samples were analyzed,such as Ni,V,Cr,As,Cd,Pb,Zn and Hg.By the methods of multivariate statistical analysis and spatial analysis,the geochemical distributions of 8 heavy metals were stated and the main sources for them were also determined.The results show that 8 heavy metals can be classified into three groups.The first group includes Ni,V,Cr and As.The mean concentration of them was found being lower than the background values in Beijing,and the spatial distribution of them was determined being dominantly influenced by the soil parent materials.The second group includes Cd,Pb and Zn.The mean concentration of them generally exceeded the background value in Beijing,and highest values were observed in the residential area.Besides of the origination from the soil parent materials,the spatial distribution of them was determined being greatly influenced by the human activities,in which Cd underwent greater influence than Pb and Zn.The third group only includes Hg,and atmospheric deposition was proposed to be the main influence factor for its distribution.Ecological risks of 8 heavy metals were mainly assessed by Hakanson method,and the indexes of the potential ecological risk for them are relatively low in the study area.关键词
农业土壤/重金属/地球化学特征/生态风险评价/北京市/密云区Key words
agricultural soil/heavy metal/geochemical characteristic/ecological risk assessment/Beijing/Miyun District分类
天文与地球科学引用本文复制引用
段续川,李苹,黄勇,林赟,袁国礼,罗先熔..北京市密云区农业土壤重金属元素地球化学特征及生态风险评价[J].现代地质,2018,32(1):95-104,10.基金项目
中央高校基础研究基金项目(2652014003,2652016073,2652016074) （2652014003,2652016073,2652016074）
中国地质大学生物地质及环境地质国家重点实验室项目(GBL2135,GBL21405) （GBL2135,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). （1041STC00611）
