Cr(VI) Adsorption on Acid Modified Diatomite

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Ma, Hongfei^1 ; Yu, Fengmei^1 ; Li, Wei^1 ; Li, Zheng^1 ; Guo, Wenmiao^1 ; Yao, Xiuqing^1 ; Tian, Yiming^1

College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun, Liaoning

113001, China^1

关键词: Adsorption equilibria;    Adsorption kinetics;    Free energy change;    Langmuir and Freundlich isotherms;    Pseudo second order kinetics;    Pseudo-first-order;    Pseudo-second order model;    Thermodynamic parameter;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/4/042148/pdf
DOI  :  10.1088/1755-1315/267/4/042148

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Cr(VI) adsorption onto diatomite has been investigated. Cr(VI) adsorption effects on original diatomite and acid modified diatomite were compared. The adsorption kinetics of Cr(VI) on acid modified diatomite were described by pseudo-first-order and pseudo-second-order models. The experimental data fit to pseudo-second-order kinetics better. Langmuir and Freundlich isotherms were used as the model adsorption equilibrium data. The thermodynamic parameters were evaluated including ΔG (Gibb's Free energy change), ΔH (enthalpy change), and ΔS (entropy change).