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Pollution assessment of potentially toxic elements (PTEs) in soils around the Yanzhuang gold mine tailings pond, Pinggu county, Beijing, China

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posted on 2021-07-01, 00:00 authored by G Zhao, X Li, J Zhu, X Zhao, Jizhen ZhangJizhen Zhang, J Zhai
The accumulation of tailings from gold mining and smelting may result in PTE pollu-tion. We investigated PTE contamination from a large amalgamated gold mine tailings pond in Pinggu County, Beijing. In November 2017, 30 soil samples were collected around the tailings pond. The concentrations and pollution degree of PTEs in the samples and the sources of Sb, As, Cd, Cu, Pb, Zn and Hg were analyzed. The average concentration of these elements in soil samples near the tailings pond (16.24, 28.29, 0.99, 171.04, 263.25, 99.73, 0.72 mg/kg, respectively) were higher than their corresponding standard values and background values of the study area. The geoaccumulation index showed that the pollution degree of As, Pb and Hg was moderate, while Sb and Cu present non-pollution to moderate pollution. The average EF values of the elements were Sb (38.31), As (4.23), Cd (0.71), Cu (3.68), Pb (21.24), Zn (0.82) and Hg (5.29), respectively. The environmental risk assessment developed throughout the PERI method indicated that Sb, As, Hg and Pb were the main pollutants in the study area. The three quantitative risk indicators (RI, Igeo and EF) were positively correlated, and all of them indicated that PTEs had significant pollution to the local area. Thus, Sb, As, Pb, Cu, and Hg pollution should be highly concerning. Multivariate statistical analysis shows that the pollution of PTEs was mainly caused by the accumulation of tailings ponds after gold mining and smelting. The research result is of great significance for the prevention and control of soil pollution of PTEs near the tailings pond.

History

Journal

International Journal of Environmental Research and Public Health

Volume

18

Issue

14

Article number

7240

Pagination

1 - 16

Publisher

MDPI

Location

Basel, Switzerland

ISSN

1661-7827

eISSN

1660-4601

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

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