Abstract
The natural environment, as well as human production and survival, is intrinsically dependent on soil. This study comprehensively assessed the pollution status, health risks, and sources of trace metals in the middle reaches of the River Gui Basin (MRGB) utilizing the geoaccumulation index, potential ecological risk index (PERI), and human health risk evaluation method. The findings of this study provide the following key insights: (1) only Cu and Pb levels in the MRGB soils did not exceed the background values established for soils in Weifang City (WFC). (2) The geoaccumulation status in most areas of the MRGB ranged from non-polluted to mildly polluted, with the overall ecological risk classification ranging from mild to moderate. (3) The cumulative non-carcinogenic risk for humans in the MRGB remained within acceptable limits, whereas the carcinogenic risk indices fell within tolerable levels. Oral ingestion emerged as the primary exposure pathway for both non-carcinogenic and carcinogenic health risks. (4) Cu, Zn, Ni, and Cr concentrations in MRGB soils primarily stemmed from natural sources associated with parent rocks, with Zn exhibiting additional influence from anthropogenic factors. In contrast, Pb, Cd, Hg, and As concentrations were predominantly driven by anthropogenic sources. Although the soils in the MRGB typically exhibited mild-to-moderate contamination levels, the contamination levels of Hg and Cd were notably more severe. As and Cr were significant health hazards. Most soil contamination sources are attributed to anthropogenic factors, warranting heightened attention from the relevant authorities.
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Funding
This study received support from the Geological Exploration and Scientific and Technological Innovation Project of Shandong Provincial Bureau of Geology and Mineral Resources (202005) and the Research on Major Geological Environmental Issues in the Coastal Zone of Shandong Province (KY201911).
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Zongjun Gao: supervision, writing—original draft.
Menghan Tan: formal analysis, software, methodology, writing—original draft.
Jiutan Liu: research, conceptualization, methodology, writing review, resource acquisition.
Yuqi Zhang: investigation, resource acquisition.
Yiru Niu: investigation.
Bing Jiang: investigation, resource acquisition.
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Gao, Z., Tan, M., Liu, J. et al. Characterization of soil trace metal pollution, source identification, and health risk assessment in the middle reaches of the Guihe River Basin. Environ Monit Assess 196, 122 (2024). https://doi.org/10.1007/s10661-023-12280-9
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DOI: https://doi.org/10.1007/s10661-023-12280-9