Spent Calgon Filtrasorb activated carbon (SAC) from glycerine deodorization unit was evaluated for the removal of methylene blue (MB). The SAC was used without further modification. The SAC was characterized for BET surface area, pH, pH_pzc and FTIR to determine the textural and chemical properties of SAC. The batch adsorption study of MB was carried out under different initial concentrations (5–500 mg/L), pH (2–11) and contact time (0–200 h). The SAC was found to have high BET surface area, pore volume and average pore diameter of 735 m²/g, 0.292 cm³/g and 2.56 nm, respectively. The properties of SAC contributed to high MB adsorption capacity of 283 mg/g. The equilibrium data fitted well with Langmuir model, indicating monolayer adsorption; while the activation energy (E_a) of Dubinin–Radushkevitch (D–R) model is lower than 8 kJ/mol, signifying physisorption. The adsorption kinetics was best illustrated by pseudo-second-order model, while the intraparticle diffusion and Boyd models suggested that film diffusion is the rate-controlling step. These findings showed that Calgon Filtrasorb SAC from glycerine deodorization unit can be potentially reused an adsorbent for the removal of dyes.

评估了来自甘油除臭装置的用过的Calgon Filtrasorb活性炭（SAC）的亚甲基蓝（MB）的去除。使用SAC无需进一步修改。对SAC的BET表面积，pH，pH _pzc和FTIR进行表征，以确定SAC的质地和化学性质。MB的批量吸附研究是在不同的初始浓度（5-500 mg / L），pH（2-11）和接触时间（0-200 h）下进行的。发现该SAC具有高的BET表面积，孔体积和0.292 cm ^3的平均孔径为735 m ² / g/ g和2.56nm。SAC的性质有助于MB吸附量达到283 mg / g。平衡数据与Langmuir模型拟合得很好，表明单层吸附。Dubinin–Radushkevitch（DR）模型的活化能（E _a）低于8 kJ / mol，表明具有物理吸附作用。吸附动力学最好用拟二阶模型来说明，而粒子内扩散和博伊德模型则表明膜扩散是速率控制的步骤。这些发现表明，来自甘油脱臭装置的Calgon Filtrasorb SAC可以潜在地重新利用吸附剂去除染料。