吸附
化学吸附
吸热过程
化学
朗缪尔吸附模型
甲基蓝
物理吸附
还原胺化
亚甲蓝
化学工程
核化学
有机化学
催化作用
光催化
工程类
作者
Li-Zhu Huo,Chaofei Guo,Zhu-Xiang Gong,Hongxiang Xu,Xuejuan Yang,Yu-Xuan Wang,Xi‐Ping Luo
标识
DOI:10.20944/preprints202311.1344.v1
摘要
The research aims to resolve water pollution generated by dye wastewater. In this paper, the aminated sodium lignosulfonate (AELS) was prepared through the Mannich reaction, and the synthesis conditions were optimized using orthogonal experiments to determine the best amination conditions. The successful preparation of AELS was demonstrated through the use of FT-IR, XRD, TG, SEM and XPS characterization techniques. Then, the adsorption capacity of Methyl blue (MB) by AELS was compared in a range of different circumstances, like pH, adsorbent dose, initial concentration, time, and temperature. Additionally, the kinetics, isotherms, and thermodynamic properties of the AELS adsorption for MB were studied and discussed. The results indicated that the fitting results were consistent with the pseudo-second-order kinetic model and Langmuir isotherm model, in accordance with the mechanism of single-molecular-layer chemisorption. And the adsorption of MB by AELS was a spontaneous and endothermic process. Upon completion of five adsorption experiments, the adsorption capacity of MB by AELS was determined to be 107.95 mg g-1, which was 5.3% lower than the first experiment. This research promotes the effective use of natural resources and allows for the sustainable use of lignin and the advancement of new applications for it.
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