【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 m²/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-Fe₂O₃/Fe₃O₄。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。更多还原

【Abstract】 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 m²/g, the total pore volume is 0.612 cm³/g, the average pore diameter is 2.55 nm, and the magnetic materials are α-Fe andγ-Fe₂O₃/Fe₃O₄. 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 concentration of the MAC was 0.5 g/L, maximum adsorption capacity of MAC for MB reached 168.5 mg/g, which exceeded the national standard of first-grade commercial activated carbon.更多还原