Evaluation of the efficiency of shell powder as a natural adsorbent for the adsorption of chromium in aqueous solutions: Kinetic and thermodynamic approach and modeling of adsorption isotherms

• Published in: Journal of the Indian Chemical Society 2025-01, Vol.102 (1), p.101503, Article 101503
• Main Authors: Allaoui, Mohamed, Berradi, Mohamed, Eddaoukhi, Abdesselam, Bensalah, Jaouad, Dagdag, Omar, Haldhar, Rajesh, Touijer, Abdellah, Es-sahbany, Hicham, El-Bachiri, Abderrahim, Ahmed, Said Ibn
• Format: Article
• Language: English
• Subjects: Adsorption; Chromium (III); Heavy metals; Shellfish; Wastewater treatment
• ISSN: 0019-4522
• DOI: 10.1016/j.jics.2024.101503

Water pollution by heavy metals such as chromium is a major environmental issue requiring effective remediation solutions. In this study, shellfish powder was used as a natural material to adsorb chromium (III) from aqueous solutions. The results show that shellfish have a significant adsorption capacity, indicating their effectiveness under a variety of conditions. Adsorption kinetics tests showed that the adsorption mechanism followed a pseudo-second-order kinetic model. In addition, thermodynamic parameters show that the adsorption process is a beneficial, spontaneous and endothermic phenomenon. Isotherm models such as Langmuir, Freundlich and Temkin were applied to analyze adsorption behavior. This research could contribute to the development of more sustainable wastewater treatment methods, incorporating natural materials into remediation strategies. [Display omitted] •Shellfish powder was used as a natural adsorbent for Cr3+ removal from aqueous solutions.•The shellfish powder demonstrated significant adsorption capacity under various conditions.•Adsorption kinetics followed a pseudo-second-order kinetic model.•Thermodynamic analysis showed the adsorption process to be spontaneous, endothermic, and favorable.•Langmuir, Freundlich, and Temkin isotherm models were applied to analyze adsorption behavior.