期刊
EUROPEAN POLYMER JOURNAL
卷 175, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2022.111343
关键词
Nanocellulose; Hydrogel; Adsorption
资金
- National Natural Science Foundation of China [34890771]
- Training Plan of Young Backbone Teachers in Colleges and Universities of Hunan Province, China [71]
In this study, a new nanocellulose-based hydrogel (NBH) was developed as a low-cost, multifunctional adsorbent for sensitive detection and removal of Cr(VI) ions. The NBH exhibited high adsorption capacity and regeneration efficiency, as well as high selectivity and sensitivity to Cr(VI) ions.
Chromium pollution is a significant environmental threat. As a result, effective and multifunctional adsorbents for removing hexavalent chromium [Cr(VI)] ions are urgently needed. A new nanocellulose-based hydrogel (NBH) based on silver nanoclusters was created in this work for the sensitive detection and removal of Cr(VI). This NBH was characterised with respect to its morphological features, chemical composition, optical properties, and sorption and detection characteristics and so on. The NBH adsorption isotherm followed the Langmuir model well, and the predicted maximum adsorption capacity was 418.5 mg/g. Kinetic study revealed that Cr(VI) sorption followed the pseudo-second-order kinetic model. Regeneration studies showed the efficiency of more than 85%, even after four adsorption-desorption cycles. The NBH displayed high selectivity and sensitivity to Cr (VI), with a detection limit of 0.43 mu g/L. Then, the mechanism analysis of the NBH for the sensitive detection and effective removal was discussed. Furthermore, a cost-of-fabrication study found that NBH was about six times less expensive than commercial activated carbon for removing Cr(VI) ions. This research suggests a new cellulose-based approach for creating a low-cost, multifunctional adsorbent for removing Cr(VI) ions.
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