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A typical case study from smelter–contaminated soil: new insights into the environmental availability of heavy metals using an integrated mineralogy characterization

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Abstract

Mineralogy was an important driver for the environmental release of heavy metals. Therefore, the present work was conducted by coupling mineral liberation analyzer (MLA) with complementary geochemical tests to evaluate the geochemical behaviors and their potential environmental risks of heavy metals in the smelter contaminated soil. MLA analysis showed that the soil contained 34.0% of quartz, 17.15% of biotite, 1.36% of metal sulfides, 19.48% of metal oxides, and 0.04% of gypsum. Moreover, As, Pb, and Zn were primarily hosted by arsenopyrite (29.29%), galena (88.41%), and limonite (24.15%), respectively. The integrated geochemical results indicated that among the studied metals, Cd, Cu, Mn, Pb, and Zn were found to be more bioavailable, bioaccessible, and mobile. Based on the combined mineralogical and geochemical results, the environmental release of smelter–driven elements such as Cd, Cu, Mn, Pb, and Zn were mainly controlled by the acidic dissolution of minerals with neutralizing potential, the reductive dissolution of Fe/Mn oxides, and the partial oxidation of metal sulfide minerals. The present study results have confirmed the great importance of mineralogy analysis and geochemical approaches to explain the contribution of smelting activities to soil pollution risks.

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Acknowledgements

The authors are grateful to the editors and anonymous reviewers for their positive comments and suggestions to significantly improve the original version of this manuscript.

Funding

This research was supported by the National Key Research and Development Program of China (2019YFC1805205).

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Da-Mao Xu: conceptualization, methodology, formal analysis, investigation, data curation, analysis, interpretation, writing–original draft, writing–review & editing, final approval of the manuscript. Rong-Bing Fu: funding acquisition, project administration, writing–review and editing. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Rong-Bing Fu.

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Responsible editor: Kitae Baek

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Xu, DM., Fu, RB. A typical case study from smelter–contaminated soil: new insights into the environmental availability of heavy metals using an integrated mineralogy characterization. Environ Sci Pollut Res 29, 57296–57305 (2022). https://doi.org/10.1007/s11356-022-19823-6

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  • DOI: https://doi.org/10.1007/s11356-022-19823-6

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