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Recent advances in clay minerals for groundwater pollution control and remediation

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Abstract

Clay minerals are abundant on Earth and have been crucial to the advancement of human civilization. The ability of clay minerals to absorb chemicals is frequently utilized to remove hazardous compounds from aquatic environments. Moreover, clay-based adsorbent products are both environmentally acceptable and affordable. This study provides an overview of advances in clay minerals in the field of groundwater remediation and related predictions. The existing literature was examined using data and information aggregation approaches. Keyword clustering analysis of the relevant literature revealed that clay minerals are associated with groundwater utilization and soil pollution remediation. Principal component analysis was used to assess the relationships among clay mineral modification methods, pollutant properties, and the Langmuir adsorption capacity (Qmax). The results demonstrated that pollutant properties affect the Qmax of pollutants adsorbed by clay minerals. Systematic cluster analysis was utilized to classify the collected data and investigate the relationships. The pollution adsorption mechanism of the unique structure of clay minerals was investigated based on the characterization results. Modified clay minerals exhibited changes in surface functional groups, internal structure, and pHpzc. This review provides a summary of recent clay-based materials and their applications in groundwater remediation, as well as discussions of their challenges and future prospects.

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Funding

This study was financially supported by the Science Technology Program of Guangzhou (202201020190, 202102010469), the Guangdong Provincial Natural Science Foundation Project (2022A1515010764), and the University-Industry Collaborative Education Program of the Ministry of Education (202101134012; 202102201012).

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Contributions

All authors contributed to the study conception and design.

Simin Hu: methodology, investigation, data curation, writing—original draft.

Yu Liu: conceptualization, methodology, supervision, writing—review and editing, funding acquisition.

Lezhang Wei: supervision, writing—review and editing.

Dinggui Luo: supervision, writing—review and editing.

Qihang Wu: supervision, writing—review and editing.

Xuexia Huang: supervision, writing—review and editing.

Tangfu Xiao: writing—review and editing.

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Correspondence to Yu Liu.

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The authors declare no competing interests.

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Responsible Editor: Xianliang Yi

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Appendix

Appendix

Table A1 Principal component scores for each indicator

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Hu, S., Liu, Y., Wei, L. et al. Recent advances in clay minerals for groundwater pollution control and remediation. Environ Sci Pollut Res 31, 24724–24744 (2024). https://doi.org/10.1007/s11356-024-32911-z

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  • DOI: https://doi.org/10.1007/s11356-024-32911-z

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