文献类型：期刊文献

英文题名：Selective adsorption and separation of methylene blue by facily preparable xanthan gum/amantadine composites

作者：Li, Yan[1];Liu, Ziqian[1];Wan, Xin[1];Xie, Lingying[1];Chen, Hui[1];Qu, Guo[1];Zhang, Han[1];Zhang, Yue-Fei[1];Zhao, Shicheng[2]

机构：[1]Changsha Univ Sci & Technol, Sch Chem & Chem Engn, Hunan Prov Key Lab Mat Protect Elect Power & Trans, Hunan Prov Key Lab Cytochemistry, Changsha 410114, Peoples R China;[2]East China Univ Sci & Technol, Dept Prod Engn, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：241

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20242616322472);WOS:【SCI-EXPANDED(收录号:WOS:000997871100001)】；

基金：Acknowledgement This work was supported by National Key R&D Program of China (No. 2022YFB2602605) , Scientific Research Fund of Hunan Provincial Education Department (No. 21B0306) , Natural Science Foundation of Changsha (No. kq2202184) , Postgraduate Scientific Research Innova-tion Project of Hunan Province (No. CX20220946) , and Undergraduate Innovation and Entrepreneurship Training Project of Changsha Uni-versity of Science and Technology (No. 2589) .

语种：英文

外文关键词：Xanthan gum; Amantadine; Adsorption

摘要：In this work, xanthan gum-based composites were successfully graft-modified by amantadine (XG-Fe3+/AM) with higher adsorption capacity and selectivity on recycling cationic dye (methylene blue, MB) from aqueous solution. The adsorption equilibrium of MB could be achieved approximately within 5 min when the initial concentration was 100 mg/L, and the maximum adsorption capacity was up to 565 mg/g. After 5 desorption-regeneration cycles, the removal rate of XG-Fe3+/AM for MB could still be as high as 95 % with slight decrement. Additionally, the effects of pH, contact time, temperature and initial dye concentration on the adsorption performance of MB were systematically examined. Furthermore, the adsorbent was characterized by FT-IR, BET and XPS analysis. In mixed anionic and cationic dyes, the adsorption selectivity of XG-Fe3+/AM on MB in the mixture of MB and methyl orange (MO) reached up to 99.69 %. Molecular dynamics simulation revealed that the trend of adsorption energy for dyes was in good agreement of the experimental order of adsorption capacities and molecular sizes among seven anionic and cationic dyes based on molecular matching effect and electrostatic interaction. Therefore, XG-Fe3+/AM is an eco-friendly, facile-synthesis and high-selectivity adsorbent, which remove cationic dyes in multi-component systems through electrostatic interaction and molecular matching effect.