Abstract
Soil pollution by heavy metals can cause continuing damage to ecosystems and the human body. In this study, we collected nine fresh topsoil samples and 18 maize samples (including nine leaf samples and nine corn samples) from agricultural soils in the Baiyin mining areas. The results showed that the order of heavy metal concentrations (mg/kg) in agricultural soils was as follows: Zn (377.40) > Pb (125.06) > Cu (75.06) > Ni (28.29) > Cd (5.46) > Hg (0.37). Cd, Cu, Zn, and Pb exceeded the Chinese risk limit for agricultural soil pollution. The average the pollution load index (4.39) was greater than 3, indicating a heavy contamination level. The element that contributed the most to contamination and high ecological risk in soil was Cd. Principal component analysis (PCA) and Pearson’s correlation analysis indicated that the sources of Ni, Cd, Cu, and Zn in the soil were primarily mixed, involving both industrial and agricultural activities, whereas the sources of Hg and Pb included both industrial and transportation activities. Adults and children are not likely to experience non-carcinogenic impacts from the soil in this region. Nonetheless, it was important to be aware of the elevated cancer risk presented by Cd, Pb, and especially Ni. The exceedance rates of Cd and Pb in corn were 66.67% and 33.3%, respectively. The results of this research provide data to improve soil protection, human health monitoring, and crop management in the Baiyin district.
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Data supporting the findings of this study are available in this article and its Supplementary Information, or from the corresponding author on request.
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This research was funded by the National Natural Science Foundation of China (No. 32001125 and 81872578); the Gansu Provincial Natural Science Foundation (22JR5RA504), and the Fundamental Research Funds for the Central Universities (lzujbky-2021–24).
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Jiangyun Liu: conceptualization, methodology, software, investigation, formal analysis, writing—original draft; Qiwen Zheng: conceptualization, methodology, software, investigation, formal analysis, writing—original draft; Shuwei Pei: data curation, writing—original draft; Jia Li: visualization, investigation, writing—review and editing; Li Ma: visualization, investigation, writing—review & editing; Li Zhang: resources, supervision, writing—review and editing; Jingping Niu: conceptualization, funding acquisition, resources, supervision, writing—review and editing; Tian Tian: conceptualization, funding acquisition, resources, supervision, writing—review and editing.
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Liu, J., Zheng, Q., Pei, S. et al. Ecological and health risk assessment of heavy metals in agricultural soils from northern China. Environ Monit Assess 196, 99 (2024). https://doi.org/10.1007/s10661-023-12255-w
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DOI: https://doi.org/10.1007/s10661-023-12255-w