由甘蔗渣制备的 MgO/N 掺杂活性炭的增强吸附能力。
Enhanced adsorption capacity of MgO/N-doped active carbon derived from sugarcane bagasse.
机构信息
Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan Guangdong 523808, China; College of Chemistry and Chemical Engineering, Neijiang Normal University, Neijiang Sichuan 641100, China.
College of Chemistry and Chemical Engineering, Neijiang Normal University, Neijiang Sichuan 641100, China.
出版信息
Bioresour Technol. 2020 Feb;297:122413. doi: 10.1016/j.biortech.2019.122413. Epub 2019 Nov 12.
MgO/N-doped active carbon (Mg/N-C) derived from sugarcane bagasse was prepared for the removal of methyl orange (MO). Mg/N-C composites presented the better adsorption capacity than that of active carbon and N-doped active carbon, of which the maximum adsorption capacity of 2-Mg/N-C-b2 for the MO removal is 384.61 mg g. The effects of MgO dosage, N-doped content, pyrolysis temperature, pH value, inorganic ions and solution temperature on the adsorption performance of Mg/N-C composites in the MO removal were investigated in detail. The pseudo-second order model and Langmuir isotherm model fitted well with the adsorption kinetics and isotherms of Mg/N-C. The rate-determining step was the boundary diffusion and intra-particle diffusion. The adsorption process of 2-Mg/N-C-b2 was a spontaneous and physisorption process.
以甘蔗渣为原料制备了 MgO/N 掺杂活性炭（Mg/N-C），用于去除甲基橙（MO）。与活性炭和 N 掺杂活性炭相比，Mg/N-C 复合材料具有更好的吸附能力，其中 2-Mg/N-C-b2 对 MO 的最大吸附容量为 384.61mg/g。详细研究了 MgO 用量、N 掺杂量、热解温度、pH 值、无机离子和溶液温度对 Mg/N-C 复合材料去除 MO 性能的影响。准二级动力学模型和 Langmuir 等温线模型很好地拟合了 Mg/N-C 的吸附动力学和等温线。速率控制步骤是边界扩散和内扩散。2-Mg/N-C-b2 的吸附过程是自发的物理吸附过程。
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