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Heavy Metal Sources, Contamination and Risk Assessment in Legacy Pb/Zn Mining Tailings Area: Field Soil and Simulated Rainfall

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Abstract

This study investigated heavy metal(HM) soil pollution and evaluated the risk and sources at a legacy tailings pond’s area in Meizhou, China. Result shows that HM accumulation in soil, particularly Cd, Pb, and Zn, were serious. Zn and Cd in tailing soil and all studied elements in field soil had a significant release potential. Four HM sources were identified by positive matrix factorization (PMF) model: cinder and vehicle emissions (11.3%), natural sources (16.3%), tailings pond and human activities (32.8%), tailings pond (39.7%). The soil was severely polluted with Cd, Pb, and Zn, which posed a high potential environmental risk near surrounding area. Column leaching tests showed that large quantities of HMs were released from the tailings soil during simulated rainfall with different pH. This study indicates that the study area has been severely polluted and continues to have a great risk of HM pollution under natural conditions.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 41673090) and Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control (No. 2017B030301012).

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Correspondence to Xiaoyun Yi.

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Hao, X., Yi, X., Dang, Z. et al. Heavy Metal Sources, Contamination and Risk Assessment in Legacy Pb/Zn Mining Tailings Area: Field Soil and Simulated Rainfall. Bull Environ Contam Toxicol 109, 636–642 (2022). https://doi.org/10.1007/s00128-022-03555-x

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  • DOI: https://doi.org/10.1007/s00128-022-03555-x

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