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Geoscience ›› 2022, Vol. 36 ›› Issue (02): 634-644.DOI: 10.19657/j.geoscience.1000-8527.2022.02.24

• Geochemistry • Previous Articles     Next Articles

Geochemistry and Source Identification of Heavy Metals in the Top and Subsoil of Yanqing District in Beijing

HUANG Yong1(), DUAN Xuchuan2, YUAN Guoli2, LI Huan1, ZHANG Qinrui1   

  1. 1. Beijing Institute of Ecological Geology,Beijing 100120,China
    2. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
  • Received:2021-04-14 Revised:2021-07-16 Online:2022-04-10 Published:2022-06-01
  • Supported by:
    ”(PXM2021_158307_000006)

Abstract:

As Yanqing District in Beijing is the ecological conservation of the capital, the study on the distribution and the source identification of heavy metals in the soil is of great significance to ensure the safe use of land and to prevent the risk of their ecological environment. In this study, 2 354 topsoil samples and 44 subsoil samples were collected from Yanqing District, and the concentrations of As, Cd, Cr, Hg, Ni, Pb, V, Zn and Sc were respectively analyzed. Based on the methods of the spatial analysis, multivariate statistics analysis and positive matrix factorization, the spatial distribution characteristics of these metals in the soil were illustrated, and the potential sources were identified, and the relative contribution of the different sources was also calculated. Conclusively, elements of V, Cr, Ni and As in the topsoil are mainly originated from soil parent materials. On the other hand, the relatively high level of Cd, Pb and Zn in the topsoil were observed in areas with high density of population, and human activities greatly affected their distribution. In addition, the distribution of Hg in topsoil was mainly affected by the atmospheric deposition. In the subsoil, the element of Hg showed high level in the residential area, and the left elements were almost not affected by human activities.

Key words: soil heavy metals, geochemistry, distribution characteristic, source identification, Yanqing District

CLC Number: