Towards a deeper understanding of the adsorption of methyl orange on a commercial activated carbon: Study of impact factors, isotherm and mechanism

Environmental Surfaces and Interfaces Pub Date : 2025-02-26 DOI:10.1016/j.esi.2025.02.002

Younes Dehmani , Dison S.P. Franco , Jordana Georgin , Redouane Mghaiouini , Bouchra Ba Mohammed , Rachid Kacimi , Taibi Lamhasni , Eder C. Lima , Noureddine El Messaoudi , Abouarnadasse Sadik

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Abstract

This study investigates the use of commercially available activated carbon for the removal of methyl orange from aqueous solutions. The main characteristics of the activated carbon are as follows: BET specific surface area: 641 m²/g; Pore volume: 0.28 cm³ /g; Microporous nature: More than 70 % of the total pore volume are micropores. A systematic approach was adopted to analyze how factors such as contact time, initial pH of the solution, and temperature influence carbon adsorption capacity. A maximum removal capacity value of 100 mg/g with an elimination rate exceeding 98 %. The adsorption behavior of methyl orange was modeled with the statistical physical modeling of the adsorption process using the single trainer model, which provided a better understanding of the adsorption mechanism of methyl orange on activated carbon. This suggests that activated carbon can be an effective adsorbent for the removal of colored compounds from water. The experimental isothermal results encourage the use of this material in the treatment of industrial tannery effluents.

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对商品活性炭吸附甲基橙的深入了解：影响因素、等温线及机理研究

本研究探讨了利用市售活性炭去除水溶液中的甲基橙。该活性炭的主要特性如下：BET比表面积：641 m²/g；孔隙体积：0.28 cm³ /g；微孔性质：微孔占总孔隙体积的70%以上 %。采用系统的方法分析了接触时间、溶液初始pH、温度等因素对碳吸附能力的影响。最大去除率为100 mg/g，去除率达98 %以上。采用单训练器模型对吸附过程进行统计物理建模，对甲基橙的吸附行为进行建模，从而更好地了解甲基橙在活性炭上的吸附机理。这表明，活性炭可以是一种有效的吸附剂，从水中去除有色化合物。实验等温结果鼓励在工业制革废水处理中使用这种材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Environmental Surfaces and Interfaces

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