Adsorption Properties of Methylene Blue from Aqueous Solution onto Thermal Modified Rectorite |
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| Authors: | Yadan Guo Yuanyuan Liu |
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| Affiliation: | 1. School of Water Resources &2. Environmental Engineering , East China Institute of Technology , Nanchang , P. R. China;3. School of Resources and Environmental Engineering , Wuhan University of Technology , Wuhan , P. R. China;4. Environmental Engineering , East China Institute of Technology , Nanchang , P. R. China |
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| Abstract: | The thermal modified rectorite (TR) was prepared and characterized by x-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy. The structure of TR was destroyed gradually with increasing the calcination temperature, and the adsorption capacity for methylene blue (MB) of the rectorite can be improved by thermal modification in appropriate temperature ranges. The equilibrium data were well described by the Langmuir model. The kinetic studies indicated that the adsorption process was fitted well with the pseudo-second-order kinetic model. Thermodynamic studies indicated that adsorption of MB was endothermic in nature and favorable with the positive ΔH 0 value of 25.90 kJ/mol. |
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| Keywords: | Kinetics methylene blue rectorite thermal modified thermodynamics |
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