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Removal of rhodamine B from aqueous solution by adsorption onto sodium montmorillonite |
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| Authors: | Selvam P Panneer Preethi S Basakaralingam P Thinakaran N Sivasamy A Sivanesan S |
| Affiliation: | aDepartment of Chemical Engineering, A.C. College of Technology, Anna University, Guindy, Chennai 600025, Tamilnadu, India bVelammal Engineering College, Chennai 600066, Tamilnadu, India cChemical Engineering Division, Central Leather Research Institute, Adyar, Chennai 600020, India |
| Abstract: | The adsorption of rhodamine B dye was carried out using sodium montmorillonite clay. The effect of parameters such as pH, adsorbent dosage and initial dye concentration was studied. The Langmuir and Freundlich isotherm models were applied and the Langmuir model was found to best fit the equilibrium isotherm data. Langmuir adsorption capacity was found to be 42.19 mg/g. Kinetic data followed pseudo-second-order kinetics. Maximum color removal was observed at pH 7.0. The ΔG° value was found to be negative, the adsorption process was feasible. The results indicate that sodium montmorillonite clay can be used for the removal of basic dyes from aqueous solutions. |
| Keywords: | Sodium montmorillonite Rhodamine B Adsorption isotherms Kinetics |
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