Preparation of thiol-based modified sallow psammophila wood membrane by wet spinning: application in adsorption of Hg2

• Published in: Journal of porous materials 2023-04, Vol.30 (2), p.531-540
• Main Authors: Yang, Xing-lin, Zhao, Bai-yun, Liu, Xiao-kai, Wang, Li
• Format: Article
• Language: English
• Subjects: Adsorbents; Adsorption; Aqueous solutions; Catalysis; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Isotherms; Membranes; Mercury (metal); Physical Chemistry; Selectivity; Strong interactions (field theory); Wet spinning; X ray photoelectron spectroscopy
• ISSN: 1380-2224; 1573-4854
• DOI: 10.1007/s10934-022-01346-7

A new adsorbent, thiol-based modified Sallow Psammophila wood Membrane (TSPPM), was successfully synthesized by wet spinning method. At the same time, the adsorption and recycling performance of Hg 2+ was evaluated. The kinetics and isotherms of the adsorption process are consistent with the Pseudo-second-order and Langmuir isotherms models, respectively, and the maximum adsorption is 1715.1 mg/g under optimal conditions. The samples were characterized using SEM, BET, FTIR, and XPS. The results suggest that the main groups adsorbed Hg 2+ are -SH, C = O, –NH. There is a strong interaction between thiol groups on TSPPM and Hg 2+ in aqueous solutions, thus the adsorption capacity is enhanced. Additionally, experiments have shown that TSPPM exhibits excellent adsorption selectivity and reuse for Hg 2+ . This research lays a foundation for the development of cost-effective, versatile and environmentally friendly Hg adsorbents.