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Mercury pollution in Peru: geographic distribution, health hazards, and sustainable removal technologies

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Abstract

Peru is one of the great gold producers worldwide. However, a significant portion of the gold produced in Peru derives from artisanal small-scale gold mining (ASGM) in the Andes and Amazon. In ASGM, gold amalgamation with mercury (Hg) is a critical procedure to refine gold through the formation of Au-Hg alloys. Due to the rudimentary and improvised techniques conducted by small-scale and informal miners, Hg contamination has become of great concern and is strictly associated with ASGM. Multiple studies have evidenced notably high concentrations of Hg in consumable fish species, rivers, sediments, and air in locations where ASGM is one of the main sources of income to local communities and is carried out aggressively. In the present review, we have conducted a systematic search for national and international literature reporting the concentration and distribution of Hg pollution across environmental compartments, biota, and human samples in Peru. The results and data retrieved from the articles were quantitatively and qualitatively analyzed, and the distribution of Hg across environmental compartments was visualized through a geographic information system. Additionally, we reviewed the use of adsorption techniques as alternatives to treat Hg0 vapor from the gold shop and smelter flues, one of the main sources of hazardous levels of Hg exposure.

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Acknowledgements

This work was supported by the Vice-rectorate of Research of the Pontificia Universidad Catolica del Peru (VRI-PUCP).

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Prof. Fernando G. Torres: conceptualization, supervision, writing (review and editing) and approved the final draft. Gabriel E. De-la-Torre: investigation, prepared figures, tables, and writing.

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Correspondence to Fernando G. Torres.

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The authors declare no competing interests.

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Torres, F.G., De-la-Torre, G.E. Mercury pollution in Peru: geographic distribution, health hazards, and sustainable removal technologies. Environ Sci Pollut Res 29, 54045–54059 (2022). https://doi.org/10.1007/s11356-022-21152-7

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  • DOI: https://doi.org/10.1007/s11356-022-21152-7

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