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现代地质 ›› 2018, Vol. 32 ›› Issue (01): 95-104.DOI: 10.19657/j.geoscience.1000-8527.2018.01.09

• 地球化学 • 上一篇    下一篇

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

段续川1(), 李苹2, 黄勇3, 林赟2, 袁国礼2(), 罗先熔1   

  1. 1.桂林理工大学 地球科学学院,广西 桂林 541006
    2.中国地质大学(北京) 地球科学与资源学院,北京 100083
    3.北京市地质勘察技术院,北京 102218
  • 收稿日期:2017-07-12 修回日期:2017-11-19 出版日期:2018-02-10 发布日期:2018-02-05
  • 通讯作者: 袁国礼,男,教授,博士生导师,1971年出生,地球化学专业,主要从事环境地球化学和岩石地球化学研究工作。 Email:yuangl@cugb.edu.cn
  • 作者简介:袁国礼,男,教授,博士生导师,1971年出生,地球化学专业,主要从事环境地球化学和岩石地球化学研究工作。 Email:yuangl@cugb.edu.cn
    段续川,女,硕士研究生,1994年出生,地球化学专业,从事环境地球化学的研究工作。Email:duan377053813@163.com
  • 基金资助:
    中央高校基础研究基金项目(2652014003);中央高校基础研究基金项目(2652016073);中央高校基础研究基金项目(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);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)

Geochemical Characteristics and Risk Assessment of Heavy Metals in Agricultural Soils in Miyun District of Beijing

DUAN Xuchuan1(), LI Ping2, HUANG Yong3, LIN Yun2, YUAN Guoli2(), LUO Xianrong1   

  1. 1. Department of Earth Sciences, Guilin University of Technology, Guilin,Guangxi 541006, China
    2. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083,China
    3. Beijing Institute of Geo-Exploration Technology, Beijing 102218, China
  • Received:2017-07-12 Revised:2017-11-19 Online:2018-02-10 Published:2018-02-05

摘要:

在北京市密云区西南部农业区系统地采集了1 065件表层土壤样品,对其中Ni、V、Cr、As、Cd、Pb、Zn、Hg 8种重金属元素的含量开展了测试分析。采用多元统计分析法及空间分析法,阐明了这些重金属元素的地球平均化学分布特征,并探讨了其可能的主要来源。结果表明,8种重金属元素主要分为3类:第一类为Ni、V、Cr、As,其含量低于北京地区背景值,其分布主要受成土母质等自然因素的影响;第二类为Cd、Pb、Zn,其平均含量高于背景值,且居民区含量最高。除继承成土母质外,此类元素的分布特征受人为活动影响较大,其中Cd受人为活动影响的程度明显高于Pb和Zn;第三类为Hg,推断大气沉降为影响Hg分布的主要因素。主要采用Hakanson法评价了土壤中重金属的生态风险,结果表明该地区潜在生态危害指数较低。

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

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.

Key words: agricultural soil, heavy metal, geochemical characteristic, ecological risk assessment, Beijing, Miyun District

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