A Systematic Literature Review on the Use of Clays for Arsenic Removal
Journal
Water
ISSN
2073-4441
Date Issued
2025-05-07
Author(s)
Lorenzo Reyes-Bozo
Eduardo Vyhmeister
Gabriel G. Castane
Juan Chirinos
Jeannette Zárraga
Claudia Sandoval-Yáñez
Type
journal-article
Abstract
Arsenic contamination in water remains a critical global challenge, particularly in rural and resource-limited regions. Clays have been widely studied as cost-effective and efficient adsorbents for arsenic removal. This systematic review provides a comprehensive analysis of the application of clays in arsenic adsorption, focusing on clay types, operational units, and study methodologies. The review classifies the adsorption mechanisms, highlights key factors influencing adsorption performance—such as pH, ionic strength, and surface modifications—and examines the effectiveness of various modifications. Furthermore, the study categorizes adsorption research into kinetic, iso-thermal, thermodynamic, and efficiency studies, providing insights into the state of the art and the experimental conditions that govern arsenic removal. It also discusses the scalability and practical application of clay-based adsorption technologies, emphasizing gaps in field validation, regeneration studies, and large-scale implementation. The findings highlight the potential of natural and modified clays in arsenic remediation, while underscoring the need for further research to optimize adsorption conditions and enhance sustainability in water treatment systems.
Subjects
adsorption isotherms
;
physisorption
;
river pollution
;
arsenic adsorption
;
arsenic contamination
;
arsenic removal
;
clay type
;
comprehensive analysis
;
cost effective
;
cost-efficient
;
global challenges
;
systematic literature review
;
systematic review
;
adsorption
;
arsenic
;
clay mineral
;
literature review
;
physicochemical property
;
sustainability
;
water treatment
;
gas adsorption
;
arsenic adsorption
;
clay minerals
;
systematic review
;
water treatment