Comparative and Competitive Adsorption of Cu（II） and Cd（II） Using Scoria： Equilibrium, Kinetic and Thermodynamic Studies

作     者：SEYFI Sara AZADMEHR Amir Reza MAGHSOUDI Abbas 

作者机构：Department of Mining & Metallurgical Engineering Amirkabir University of Technology Tehran *** Iran 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2017年第33卷第3期

页      面：471-478页

核心收录：

学科分类：082803[工学-农业生物环境与能源工程] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0828[工学-农业工程] 0804[工学-仪器科学与技术] 070303[理学-有机化学] 0703[理学-化学] 

主　　题：Adsorption Individual isotherm Multi-component isotherm Kinetics Thermodynamic 

摘      要：Heavy metals, such as Cu（Ⅱ） and Cd（Ⅱ） are among the hazardous pollutants that lead to severe ecological problems and have a toxic effect on living organisms. This study was carried out on adsorption of Cu（Ⅱ） and Cd（Ⅱ） from single-and multi-component aqueous solutions with Iranian scoria. Two- and three-parameter isotherm models, such as Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, Khan and Toth have been studied for single and bi- nary adsorption of Cu（Ⅱ） and Cd（Ⅱ） onto scoria. The best result was attained from Langmuir model for Cu（Ⅱ） and Cd（Ⅱ） ions in single and binary solution. Therefore, homogenous adsorption is dominated, which was emphasized by three-parameter isotherm models. Based on the value of the free energy of adsorption for Cu（Ⅱ） and Cd（Ⅱ）, the inte-raction between these ions and scoria is a physical adsorption. In order to investigate competitive adsorption behavior, modified and extended Langmuir and Freundlich models have been studied, which indicated that adsorption of Cu（Ⅱ） and Cd（Ⅱ） on scoria has synergistic behavior. Extended Freundlich model and modified Langmuir model described Cu（Ⅱ） and Cd（Ⅱ） adsorption onto scoria, respectively.