纤维/芬顿污泥基磁性活性炭对亚甲基蓝吸附性能的研究  

Study on Adsorption of Methylene Blue by Fiber/Fenton Sludge-based Magnetic Activated Carbon

作　　者：王慧[1] 刘俊杰 夏洁 朱荣耀 张文晖[1] WANG Hui;LIU Junjie;XIA Jie;ZHU Rongyao;ZHANG Wenhui(China Light Industry Key Laboratory of Papermaking and Biorefinery,Tianjin Key Laboratory of Pulp and Paper,College of Light Industry Science and Engineering,Tianjin University of Science&Technology,Tianjin 300457,China;China National Pulp and Paper Research Institute Co.,Ltd.,Beijing 100102,China)

机构地区：[1]中国轻工业造纸与生物质精炼重点实验室,天津市制浆造纸重点实验室,天津科技大学轻工科学与工程学院,天津300457 [2]中国制浆造纸研究院有限公司,北京100102

出　　处：《天津造纸》2021年第1期32-38,共7页Tianjin Paper Making

摘　　要：针对传统活性炭固液分离困难问题,以纤维和芬顿污泥为原料、KOH为活化剂,采用一步热解法制备了磁性活性炭(MAC)。实验和分析表明:所制备MAC的BET比表面积达到958.70 m^(2)/g,总孔孔容达到0.612 cm3/g,平均孔径为2.55 nm,其磁性来源于α-Fe和γ-Fe_(2)O_(3)/Fe_(3)O_(4)。MAC对亚甲基蓝(MB)的吸附动力学符合准二级动力学模型。相对于Freundlich和Dubinin-Radushkevich两种吸附等温模型,Langmuir吸附等温模型能更好地描述MAC对MB的等温吸附过程。此外,当MAC浓度为0.5 g/L时,MAC对MB的最大吸附容量达到168.5 mg/g,超过商用活性炭一级品标准。In view of the difficulty of solid-liquid phase separation for traditional activated carbons,magnetic activated carbon(MAC)was prepared by one-step pyrolysis with fiber and Fenton sludge as raw materials and KOH as activator.Experiments and analysis show that the BET specific surface area of MAC is 958.70 m^(2)/g,the total pore volume is 0.612 cm^(3)/g,the average pore diameter is 2.55 nm,and the magnetic materials areα-Fe andγ-Fe_(2)O_(3)/Fe_(3)O_(4).The methylene blue(MB)adsorption onto MAC is in accordance with the quasi-second-order kinetic model.Compared with the isotherm models of Freundlich and Dubinin-Radushkevich,the Langmuir isotherm model can better describe the isothermal adsorption process of MAC for MB.In addition,when the con-centration of the MAC was 0.5 g/L,maximum adsorption capacity of MAC for MB reached 168.5 mg/g,which ex-ceeded the national standard of first-grade commercial activated carbon.

关 键 词：磁性活性炭 芬顿污泥 纤维 亚甲基蓝 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]