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| Preparation and Reductive Adsorption of Cr(Ⅵ) in Waste Water by Modified Thiolated Cellulose |
| Received:November 14, 2025 Revised:December 10, 2025 |
| DOI：10.11980/j.issn.0254-508X.2026.02.018 |
| Key Words:modified cellulose L-cysteine reduction adsorption Cr(Ⅵ) |
| Fund Project:陕西科技大学自然科学前沿研究基金（2020XSGG-07）；陕西省重点研发计划（2022GY-278）；陕西省自然科学基金（2023-JC-YB-104）；广西清洁化制浆造纸与污染控制重点实验室开放基金（2023GXZZKF36）。 |
| Author Name | Affiliation | Postcode | | DU Yichun* | College of Light Industry Science and Engineering,Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | JIANG Xue* | College of Light Industry Science and Engineering,Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | JIAO Xinye | College of Light Industry Science and Engineering,Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | XIANG Zhong | College of Light Industry Science and Engineering,Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | XIAO Jiale | College of Light Industry Science and Engineering,Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | XU Gongtao | College of Light Industry Science and Engineering,Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | TIAN Xiuzhi* | College of Light Industry Science and Engineering,Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 |
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| Abstract:This study successfully prepared a thiol/sulfonic acid dual-functionalized modified cellulose adsorbent (L-TDAC) for the efficient removal of Cr(Ⅵ) from waste water. Taurine and L-cysteine were grafted onto the cellulose backbone via periodate oxidation followed by Schiff base reactions. Material characterization confirmed the successful introduction of sulfonic acid and thiol groups. Under conditions of pH value was 3.0， adsorbent dosage was 50 mg， initial Cr(Ⅵ) concentration was 100 mg/L， L-TDAC exhibited a maximum Cr(Ⅵ) adsorption capacity of 96.33 mg/g. The adsorption process followed pseudo-second-order kinetics and the Langmuir isotherm model， indicating monolayer chemisorption. Mechanistic analysis revealed a synergistic “adsorption-reduction-immobilization”process the thiol groups reduced the adsorbed Cr(Ⅵ) to Cr(Ⅲ) in situ， and the generated Cr(Ⅲ) was subsequently complexed and fixed by functional groups such as sulfonic acid. The material demonstrated good regenerability， maintaining a removal efficiency above 80% after 6 adsorption-desorption cycles， highlighting its potential as a green adsorbent for treating chromium-containing wastewater. |
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