Removal of copper ions from aqueous solution by adsorption using LABORATORIES-modified bentonite （organo-bentonite）

作     者：Sandy Velycia MARAMIS Alfin KURNIAWAN Aning AYUCITRA Jaka SUNARSO Suryadi ISMADJI 

作者机构：Department of Chemical EngineeringWidya Mandala Surabaya Catholic UniversitySurabaya 60114Indonesia Australian Research Council(ARC)Centre of Excellence for Elcctromaterials ScienceInstitute for Technology Research and InnovationDeakin UniversityVictoria 3125Australia 

出 版 物：《Frontiers of Chemical Science and Engineering》 (化学科学与工程前沿（英文版）)

年 卷 期：2012年第6卷第1期

页      面：58-66页

核心收录：

学科分类：081901[工学-采矿工程] 081704[工学-应用化学] 0819[工学-矿业工程] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

主　　题：heavy metal copper adsorption organo-bentonite temperature dependent 

摘      要：Equilibrium, kinetic and thermodynamic aspects of the adsorption of copper ions from an aqueous solution using linear alkylbenzene sulfonate （LABORA- TORIES） modified bentonite （organo-bentonite） are reported. Modification of bentonite was performed via microwave heating with a concentration of LABORA- TORIES surfiactant equivalent to 1.5 times that of the cation exchange capacity （CEC） of the raw bentonite. Experimental parameters affecting the adsorption process such as pH, contact time and temperature were studied. Several adsorption equations （e.g., Langmuir, Freundlich, Sips and Toth） with temperature dependency were used to correlate the equilibrium data. These models were evaluated based on the theoretical justifications of each isotherm parameter. The Sips model had the best fit for the adsorption of copper ions onto organo-bentonite. For the kinetic data, the pseudo-second order model was superior to the pseudo-first order model. Thermodynamically, the adsorption of copper ions occurs via chemisorption and the process is endothermic （△H^0〉0）, irreversible （△S^0〉0） and nonspontaneous （△G^0〉0）.