The removal of two hazardous dyes, MB and MG newly synthesized economic activated carbon. The adsorbent was synthesized from an agro waste material. The activated carbon has been characterized by XRD, FTIR, SEM, and surface area. A comparative study of the removal of selected dyes was reported. The process of removal for both the dyes is optimized for important parameters. It has been observed that removal of the dyes is maximum in alkaline range of pH. Both for MB and MG, the removal is controlled by first order kinetics. Mass transfer studies for both the dyes have been reported and the values of coefficient of mass transfer are found to be 2.25×10-5 cm/s and 1.92 cm/s respectively at 30°C. The rates of transfer of dyes onto the adsorbent surface were significant both the cases. The process of removal is endothermic and in both the cases higher temperature favoured the removal. Equilibrium data fitted Freundlich adsorption isotherm and the values of constants are found to be 0.59 and 3.01 mg/g for the removal of selected dyes. The results show suitability of the synthesized material for both the systems and can serve as baseline data for dyes removal.

中文翻译：

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低成本活性炭去除溶液中有害染料亚甲蓝 (MB) 和孔雀石绿 (MG) 的比较研究

去除两种有害染料 MB 和 MG 新合成的经济型活性炭。吸附剂由农业废料合成。活性炭已通过 XRD、FTIR、SEM 和表面积进行表征。报告了去除选定染料的比较研究。两种染料的去除过程都针对重要参数进行了优化。已经观察到在碱性pH范围内染料的去除最大。对于 MB 和 MG，去除均受一级动力学控制。已经报道了两种染料的传质研究，并且发现传质系数值在 30°C 下分别为 2.25×10-5 cm/s 和 1.92 cm/s。染料转移到吸附剂表面的速率在两种情况下都很显着。去除过程是吸热的，在这两种情况下，较高的温度都有利于去除。平衡数据拟合 Freundlich 吸附等温线，发现去除选定染料的常数值为 0.59 和 3.01 mg/g。结果表明合成材料适用于这两种系统，并可作为染料去除的基线数据。