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Bimetallic adsorbents for wastewater treatment: a review

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Abstract

The rising pollution of water resources is threatening the health of humans and ecosystems, calling for advanced methods to clean polluted waters. Adsorption on various sorbents is a common remediation method, yet its efficiency is often limited by competition of multiple contaminants for adsorption sites. To solve this issue, bimetallic adsorbents have been recently developed for water and wastewater treatment due to their multiple functionalities, easy fabrication, high specific surface area and volume ratio. Here we review bimetallic adsorbents with focus on preparation methods, characterization, substrates, mechanisms and cost. Substrates include graphene, polymers, metal–organic frameworks, zeolite, mesoporous silica, cellulose, chitosan, clay, carbonaceous waste and composites. We observed that the synergy between the substrate and metal ions provides more active adsorption sites, which results in an enhanced adsorption capacity.

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The dataset generated and analysed during this study could be obtained from the corresponding author on reasonable request.

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Acknowledgements

The research was supported by the National Key Research and Development Program of China (2018YFD0401402–04) and Zhongyuan Scholars Foundation (202101510005).

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(1) AAA contributed to conceptualization, writing—original draft; (2) YL contributed to writing—review and editing; (3) RPH contributed to conceptualization; resources; project administration; writing—review and editing, funding acquisition. (4) LBQ contributed to funding acquisition.

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Correspondence to Runping Han.

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Aryee, A.A., Liu, Y., Han, R. et al. Bimetallic adsorbents for wastewater treatment: a review. Environ Chem Lett 21, 1811–1835 (2023). https://doi.org/10.1007/s10311-023-01566-6

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  • DOI: https://doi.org/10.1007/s10311-023-01566-6

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