Ismail Basma M, Zayed Ahmed M, Roshdy Mahmoud A, Rafea Mohamed Abdel, Mohamed Fathy M
Water and Environment Department, Faculty of Earth Sciences, Beni-Suef University, Beni-Suef City, Egypt.
Applied Mineralogy and Water Research Lab, Department of Geology, Faculty of Science, Beni-Suef University, Beni-Suef City, Egypt.
Sci Rep. 2025 Jun 20;15(1):20112. doi: 10.1038/s41598-025-04240-9.
The current study investigates the development and characterization of sustainable activated carbons (ACs) via chemo-thermal activation from the hull and core of sugarcane bagasse as a viable and renewable substitute for commercial ACs. Characterize ACs using XRD, FTIR, SEM, etc. The sorption kinetics of methylene blue (MB) onto AC(H) were well described by a pseudo-second-order model. Also, the controlling step in the MB sorption process was related to several intervening diffusion sorts, including intra-particle ones. The MB equilibrium data were also analyzed using linear and non-linear forms of Langmuir, Freundlich, and Temkin isotherms, revealing a better fit of Langmuir, with R values > 0.97 in both modes. With adsorption capacities (q = 357.14 and 389.4 mg/g) in linear and non-linear modes, orderly. The activation energy (EDR) of 550.8 and 2500 J/mol in non-linear and linear further supports the dominance of chemisorption, implying the formation of chemical bonds between the MB and the functional groups present in the sorbent material. The spontaneous and exothermic nature of the MB sorption process at 291-323 K was confirmed by the thermodynamic parameters ΔH°, ΔS°, and ΔG°. The design expert program suggested 17 numerical possibilities for the maximum dye removal at the 99% desirability level using ANOVA within the experimental parameter range. The total cost of producing 1.0 g of AC(H) is estimated at 0.041 USD. These findings underscore the potential of AC(H) as a highly efficient adsorbent for MB removal, positioning it as a strong candidate for wastewater treatment applications.
本研究通过化学热活化法，以甘蔗渣的外皮和芯为原料，研究了可持续活性炭（ACs）的制备及其特性，旨在作为商业活性炭的可行且可再生替代品。采用XRD、FTIR、SEM等手段对活性炭进行表征。亚甲基蓝（MB）在AC(H)上的吸附动力学可用准二级模型很好地描述。此外，MB吸附过程中的控制步骤与几种中间扩散类型有关，包括颗粒内扩散。还使用Langmuir、Freundlich和Temkin等温线的线性和非线性形式对MB平衡数据进行了分析，结果表明Langmuir等温线拟合效果更好，两种模式下的R值均>0.97。线性和非线性模式下的吸附容量（q分别为357.14和389.4 mg/g）依次排列。非线性和线性模式下的活化能（EDR）分别为550.8和2500 J/mol，进一步支持了化学吸附的主导地位，这意味着MB与吸附剂材料中存在的官能团之间形成了化学键。热力学参数ΔH°、ΔS°和ΔG°证实了MB在291 - 323 K吸附过程的自发性和放热性质。设计专家程序在实验参数范围内使用方差分析，提出了在99%期望水平下实现最大染料去除率的17种数值可能性。生产1.0 g AC(H)的总成本估计为0.041美元。这些发现强调了AC(H)作为高效去除MB吸附剂的潜力，使其成为废水处理应用的有力候选者。
