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

Frontiers of Chemical Science and Engineering 2012年第1期6卷 58-66页

作者： Sandy Velycia MARAMIS Alfin KURNIAWAN Aning AYUCITRA Jaka SUNARSO Suryadi ISMADJI Department of Chemical Engineering Widya Mandala Surabaya Catholic UniversitySurabaya 60114Indonesia Australian Research Council(ARC)Centre of Excellence for Elcctromaterials Science Institute for Technology Research and InnovationDeakin UniversityVictoria 3125Australia

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）.

关键词： heavy metal copper adsorption organo-bentonite temperature dependent

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Removal of Cr (Ⅵ) from Simulated Wastewater by FeOOH Supported on organo-bentonite

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Meteorological and Environmental Research 2016年第4期7卷 53-55页

作者： Zhou Xiaotie Liu Xuegang Sun Shiqun Anhui Institute of Environmental Science Hefei 230061 China School of Resource and Environment Engineering Hefei University of Technology Hefei 230009 China

FeOOH supported on organo-bentonite was prepared by organo-bentonite with good absorptive property,and the effects of dosage of the composite adsorbent,temperature,and Cr(Ⅵ)concentration on the removal rate of Cr(Ⅵ)in the simulated wastewater were *** results indicated that the removal effect of Cr(Ⅵ)was good when the mass fraction of organo-bentonite was 3‰.The removal rate of Cr(Ⅵ)from the simulated wastewater could reach the maximum 98.37% under the following conditions:the dosage of the composite adsorbent was 1.0g;the temperature was 25℃;Cr(Ⅵ)concentration was 10mg/L;the oscillating time was 4h.

关键词： FeOOH organo-bentonite Adsorption Wastewater containing Cr(Ⅵ) China

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