壳聚糖-Urushiol 复合纳米纤维膜对废水中 Cr(vi) 的吸附和回收

IF 3.2 3区化学 Q2 POLYMER SCIENCE

e-Polymers Pub Date : 2024-01-06 DOI:10.1515/epoly-2023-0157

Xiaoyu Jie, Bing-Chiuan Shiu, Huazhong Wu, Yuchi Zhang, Yuansong Ye, Chunxiang Lin, Run Fang

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引用次数: 0

摘要

壳聚糖（CS）被广泛用于处理含有金属离子的废水。然而，壳聚糖在酸性水溶液中的稳定性较差，这严重限制了它在许多实际应用场景中的应用。本研究以天然生物材料乌洛托品（urushiol）为交联剂，通过电纺丝法制备了一种基于 CS 的复合纳米纤维膜。系统研究了 CS-U 膜在吸附和回收废水中 Cr(vi) 的应用。CS-U 膜对强酸性和强氧化性环境具有很强的耐受性，吸附过程结合了静电吸引和氧化还原反应两种机制。由于CS-U膜具有纳米级纤维、多孔结构和较强的耐酸性，因此在批处理和连续处理模式下都能快速高效地吸附Cr(vi)。此外，通过调节溶液的 pH 值，CS-U 膜对 Cr(vi) 的吸附能力和选择性可同时达到最大化，从而促进高纯度 Cr2O3 的回收。

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Adsorption and recovery of Cr(vi) from wastewater by Chitosan–Urushiol composite nanofiber membrane

Chitosan (CS) is widely used in the treatment of wastewater containing metal ions. However, the poor stability in acidic aqueous solutions severely limits its application in many practical scenarios. In this work, a CS-based composite nanofiber membrane was prepared by electrospinning using urushiol, a natural biomaterial, as the cross-linking agent. The application of the CS-urushiol (CS-U) membrane in the adsorption and recovery of Cr(vi) in wastewater was systematically studied. The CS-U membrane showed great resistance to strongly acidic and oxidative environments, and the adsorption process combined two mechanisms of electrostatic attraction and redox reaction. Due to the nanoscale fibers, porous structure, and strong acid resistance, the CS-U membrane adsorbed Cr(vi) rapidly and efficiently in both batch and continuous modes. Moreover, the adsorption capacity and selectivity of the CS-U membrane for Cr(vi) could be maximized simultaneously by adjusting the solution pH, promoting the recovery of high-purity Cr2O3.

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来源期刊

e-Polymers 化学-高分子科学

CiteScore

5.90

自引率

10.80%

发文量

审稿时长

6.4 months

期刊介绍： e-Polymers is a strictly peer-reviewed scientific journal. The aim of e-Polymers is to publish pure and applied polymer-science-related original research articles, reviews, and feature articles. It includes synthetic methodologies, characterization, and processing techniques for polymer materials. Reports on interdisciplinary polymer science and on applications of polymers in all areas are welcome. The present Editors-in-Chief would like to thank the authors, the reviewers, the editorial staff, the advisory board, and the supporting organization that made e-Polymers a successful and sustainable scientific journal of the polymer community. The Editors of e-Polymers feel very much engaged to provide best publishing services at the highest possible level.