Department of Chemical Engineering, University of Engineering and Technology, Lahore 54890, Pakistan E-mail:
Department of Chemical Engineering, The University of Jordan, Amman 11942, Jordan.
Water Sci Technol. 2020 Feb;81(3):466-478. doi: 10.2166/wst.2020.119.
Amine functionalized carbon (AFC) was synthesized from raw oil fly ash and later utilized it for simultaneous removal of methyl orange (MO) and rhodamine 6G (Rh6G) pollutant dyes from aqueous medium. AFC was analyzed through scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area and Fourier transform infrared spectroscopy (FTIR) to examine its morphology, porosity and structural characteristics, respectively. The effect of various process parameters like mixing time, pollutant concentration, adsorbent dose, initial solution pH, and temperature of the medium were investigated for dye removal process. The experimental findings showed that the percentage removal of Rh6G was higher than MO and both dyes showed synergism during the adsorption from binary dye solution. Pseudo-second-order model was most appropriate model for both dyes and thermodynamic parameters showed that the dyes removal process was endothermic in nature. Among various isotherm models, Hill and Toth isotherms best explain the adsorption of Rh6G and MO from binary dye solution.
胺功能化碳（AFC）是由原始油飞灰合成的，后来用于从水介质中同时去除甲基橙（MO）和罗丹明 6G（Rh6G）污染物染料。AFC 通过扫描电子显微镜（SEM）、BET 表面积和傅里叶变换红外光谱（FTIR）进行分析，分别检查其形态、孔隙率和结构特征。研究了各种工艺参数（如混合时间、污染物浓度、吸附剂剂量、初始溶液 pH 值和介质温度）对染料去除过程的影响。实验结果表明，Rh6G 的去除率高于 MO，并且在二元染料溶液的吸附过程中两种染料均表现出协同作用。准二级动力学模型最适合两种染料，热力学参数表明染料去除过程本质上是吸热的。在各种等温模型中，Hill 和 Toth 等温线最能解释 Rh6G 和 MO 从二元染料溶液中的吸附。
