Adsorption isotherms, kinetics, and thermodynamics of Au(III) on chitosan/palm kernel fatty acid distillate/magnetite nanocomposites

This study examined the adsorption isotherms, kinetics, and thermodynamics of Au(III) onto chitosan/palm kernel fatty acid distillate/magnetite nanocomposites (CPMNs) to enhance the understanding of adsorption behavior and mechanisms. Adsorption experiments were conducted across various initial Au(I...

全面介绍

书目详细资料
发表在:International Journal of Biological Macromolecules
主要作者: Chang S.H.; Jampang A.O.A.; Din A.T.M.
格式: 文件
语言:English
出版: Elsevier B.V. 2025
在线阅读:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85217428471&doi=10.1016%2fj.ijbiomac.2025.140913&partnerID=40&md5=1ed9a14056f1c000cc9c6db0d96dcd9b
实物特征
总结:This study examined the adsorption isotherms, kinetics, and thermodynamics of Au(III) onto chitosan/palm kernel fatty acid distillate/magnetite nanocomposites (CPMNs) to enhance the understanding of adsorption behavior and mechanisms. Adsorption experiments were conducted across various initial Au(III) concentrations, contact times, and temperatures. The experimental data were analyzed using nonlinear isotherm and kinetic models, and thermodynamic parameters were evaluated. The results revealed that the Langmuir model best fits the adsorption equilibrium data, showing a maximum monolayer adsorption capacity of 1.102–1.163 mmol/g (217–229 mg/g). The pseudo-first-order model best describes the kinetic data, suggesting first-order kinetics and a physisorption-dominated process. Thermodynamic analysis indicated that the adsorption is spontaneous, endothermic, entropy-driven, and highly favorable, primarily governed by physisorption. This study provides significant insights into the adsorption mechanisms of CPMNs for Au(III), contributing to advancing cost-effective and eco-friendly adsorbents for industrial use, such as wastewater treatment and metal recovery in mining, metallurgy, and electronic waste recycling industries. © 2025 Elsevier B.V.
ISSN:1418130
DOI:10.1016/j.ijbiomac.2025.140913