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摘要
The present work developed and analyzed an appropriate conversion method for electrolytic manganese residues (EMR) into a porous ceramics adsorbent for methylene blue (MB), which is simple in preparation and regeneration process, low in price, convenient in separation process, good reproducibility and environmentally friendly. The physicochemical properties of the electrolytic manganese residue-based porous ceramics (EMR-based ceramics) were characterized by X-ray diffraction, scanning electron microscopy, FT-IR, BET specific surface area, and BJH pore size distribution measurement. The effects of the contact time, temperature, initial concentration of MB, and pH on the adsorption process were studied. The kinetics, isotherm, thermodynamics, and mechanism analysis were investigated in detail. The results showed that the adsorption kinetics suitability used the pseudo-second-order kinetic model, and the adsorption isotherm data were fitted well to the Freundlich isotherm model. The thermodynamic parameters indicated that the adsorption process was a spontaneous, endothermic, and entropic-adding process. In conclusion, the EMR-based porous ceramics could be utilized as an adsorbent for the removal of MB effectively and repeatedly.
- 出版日期2016-12
- 单位中南大学
