食用菌菌渣转化的多孔碳对水溶液中四环素的吸附研究
首发时间:2017-05-12
摘要:近年来,由包括四环素在内的抗生素引发的水污染问题日趋严重,不容忽视。本工作以食用菌菌渣为原料,经炭化和活化过程制备出多孔碳材料,其比表面积高达3878.3m2/g,制备方法简单,成本低廉。如此制得的多孔碳材料用于吸附、去除水溶液中的四环素,表现出优异的吸附性能,实验测得在25℃时最大平衡吸附量高达1348.2 mg/g。吸附实验还探究出25℃时吸附的最适pH值为4,所测得的吸附等温线能很好地符合Freundlich和Temkin模型,吸附的动力学行为则非常符合拟二级动力学方程。该多孔碳材料表现出对四环素的高效吸附能力,展现出可观的前景。
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Porous carbon derived from edible fungus dregs for tetracycline adsorption from aqueous solution
Abstract:In recent years, water contamination problems caused by antibiotics including tetracycline have become increasingly serious. In this work, porous carbon materials are prepared through carbonization and activation of edible fungus dregs as raw materials. The synthesis method is low-cost and facile.The specific surface area of the as-prepared porous carbon materials is quite high, reaching to 3878.3 m2/g. When these porous carbon materials are applied into the adsorption and removal of tetracycline, they showed excellent adsorptive properties with a maximum equilibrium adsorption capacity of 1348.2 mg/g at 25℃. The adsorption experiment results showed that the adsorptive optimum pH value was 4. The adsorption isotherm at 25℃ fits Freundlich and Temkin models well, and the kinetics of adsorption fits pseudo-second-order kinetic model perfectly.The as-prepared porous carbon materials has been a promising adsorbent for adsorption of tetracycline.
Keywords: physical chemistry fungus dregs porous carbon tetracycline adsorption
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