The adsorption of methylene blue (MB) onto activated carbon with different potassium hydroxide (KOH) ratios was studied to determine the effect of the ratio on activated carbon’s removal efficiency, kinetics, and surface area. The KOHTPS-activated carbon was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, SEM-EDX, Brunauer-Emmett-Teller surface area, and pH_pzc, and a quantum chemical description was calculated for the MB molecule, which yielded energies associated with HOMO (−8.43 eV), LUMO (−4.12 eV), and total energy (−27,475.76 kcal/mol). For the batch adsorption of MB, a concentration of 100 mg/L was used. The results show that adsorption followed the Freundlich isotherm as multilayer adsorption, while the kinetics indicated a 720 min equilibrium time of adsorption and a pseudo second order kinetic model. The maximum adsorption capacities for the removal of MB were 2298.08 mg g⁻¹, 704.22 mg g⁻¹, and 684.93 mg g⁻¹ for KOH to TPS ratios of 1:1, 2:1, and 3:1, respectively. The surface area increased as the ratio of KOH increased, indicating that the KOH to TPS ratio of 3:1 was the best adsorbent for removal of MB with a percent removal efficiency of 97.83% and a higher surface area.

研究了不同比率的氢氧化钾（KOH）对亚甲基蓝（MB）在活性炭上的吸附，以确定该比例对活性炭的去除效率，动力学和表面积的影响。KOHTPS活化碳的特征在于X射线衍射，傅里叶变换红外光谱，SEM-EDX，Brunauer-Emmett-Teller表面积和pH _pzc，并为该MB分子计算了一个量子化学描述，该分子产生了与HOMO（-8.43 eV），LUMO（-4.12 eV）和总能量（-27,475.76 kcal / mol）相关的能量。对于MB的批量吸附，浓度为100 mg / L。结果表明，吸附遵循Freundlich等温线作为多层吸附，而动力学表明吸附平衡时间为720分钟，并具有伪二级动力学模型。用于去除MB的最大吸附容量分别为2298.08毫克克^-1，704.22毫克克^-1，和684.93毫克克^-1KOH与TPS的比例分别为1：1、2：1和3：1。表面积随KOH比例的增加而增加，表明KOH与TPS的比例为3：1是去除MB的最佳吸附剂，百分比去除效率为97.83％，表面积更大。