In the present study, batch adsorption experiments were carried out to investigate the removal of methyl orange (MO) from aqueous solution using sugar scum powder as an effective inorganic adsorbent which is a cheap precursor and abundant. The characteristics of this material were determined using XRD, SEM/EDX, and FTIR. The adsorption performance of sugar scum powder was evaluated using MO as the model adsorbate. Effects of various parameters such as initial dye concentration, contact time, and adsorbent dose were studied. The adsorption process can be best described by the pseudo-second-order kinetic and Langmuir adsorption isotherm models. Maximum monolayer adsorption capacity for MO removal was found to be 15.24 mg/g at temperature 22°C and pH 7.2. Moreover, thermodynamic parameters suggested that the adsorption of MO onto sugar scum powder was a spontaneous and exothermic process. The results demonstrated that sugar scum is a suitable precursor for the preparation of efficient adsorbent for dye removal from wastewater.

中文翻译：

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甲基橙作为低成本无机吸附剂在糖渣粉上的吸附热力学和动力学研究

在本研究中，进行批量吸附实验以研究使用糖渣粉作为有效的无机吸附剂从水溶液中去除甲基橙 (MO)，糖渣粉是一种廉价且丰富的前体。这种材料的特性是使用 XRD、SEM/EDX 和 FTIR 确定的。以MO为模型吸附质评价糖渣粉的吸附性能。研究了各种参数的影响，例如初始染料浓度、接触时间和吸附剂剂量。吸附过程可以用拟二级动力学和朗缪尔吸附等温线模型来最好地描述。在温度 22°C 和 pH 值 7.2 下，发现用于去除 MO 的最大单层吸附容量为 15.24 mg/g。而且，热力学参数表明 MO 在糖渣粉上的吸附是一个自发的放热过程。结果表明，糖渣是制备用于去除废水中染料的高效吸附剂的合适前体。