Preparation of activated carbon from edible fungi residue by microwave assisted K₂CO₃ activation鈥擜pplication in reactive black 5 adsorption from aqueous solution

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• 作者：Hong Xiao ; ^{scux_hong@163.com} ; Hong Peng ; Shihuai Deng ; Xinyao Yang ; Yanzong Zhang ; Yuanwei Li
• 关键词：Edible fungi residue ; Activated carbon ; Microwave radiation ; K2CO3 ; Reactive black 5
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：May, 2012
• 卷：111
• 期：Complete
• 页码：127-133
• 文件大小：495 K

摘要

Preparation of activated carbon from the edible fungi residue (EFR) by microwave assisted K₂CO₃ activation was studied. The optimum preparation conditions were as follows: radiation time of 16 min, K₂CO₃/EFR ratio of 0.8 and microwave power of 520 W. The iodine number, the amount of methylene blue adsorption and the yield of activated carbon prepared under optimum conditions were 732.74, 172.43 mg/g and 23.0%, respectively. The activated carbon was characterized by SEM, FT-IR, N₂ adsorption and pH_ZPC, and then they were used as adsorbent for removing reactive black 5 from aqueous solution. The highest removal efficiency of 100%could be achieved at the solution pH of 2.0, the adsorption efficiency descended with the increasing of pH and the optimum activated carbon dose was 8.75 g/L. The Langmuir isotherm well fit the adsorption process with the complete monolayer adsorption capacity of 19.6 mg/g and the equilibrium adsorption constant of 0.39 L/mg.