Dwivedi, Amarendra Dhar Sanandiya, Naresh D. Singh, Jitendra Pal Husnain, Syed M. Chae, Keun Hwa Hwang, Dong Soo Chang, Yoon-Seok 2024-01-20T02:33:00Z 2024-01-20T02:33:00Z 2021-09-04 2017-01 2168-0485 https://pubs.kist.re.kr/handle/201004/123282 Cellulose nanofiber (CNF) is one of the emerging green candidates for the various domains due to its sustainability, abundance availability, and high surface area. However, its effectiveness in the environmental aspect of toxic heavy metal removal required improvement by tuning the interface between CNF and heavy metals, and by understanding removal mechanisms. Herein, we synthesized four types of surface-functionalized CNF from waste coffee-filters for enhanced uptake of As-V and Cr-VI in the different water matrices. Among them, Fe3+-cross-linked CNF-Fe2O3 (FF) and mussel-inspired dopamine conjugated CNF (DP) demonstrated significant performance in water treatment for As-V and Cr-VI, respectively, than commercial activated carbon based adsorbents. Combined X-ray absorption near-edge spectroscopy (XANES), extended X-ray absorption fine structure (EXAFS) spectroscopy, and data fitting elucidated the complexation mode of As-V and Cr-VI to each CNF derivative which suggested that As-V binds through a bidentate-binuclear complex and that Cr-VI binds to catecholic OH as a trinuclear complex. Simultaneously, the transformation of harmful Cr-VI into nontoxic Cr-III was observed in DP which supports their potential practical applications. Taken together, our comprehensive data not only provide the material fabrication, interface behavior, and impact of water quality parameters in simulated and real contaminated waters but also explore the holistic understanding of the heavy metal removal mechanism and adsorbate-adsorbent interfacial interaction of these novel CNF derivatives. English American Chemical Society SURFACE COMPLEXATION METAL-CATECHOLATE ADSORPTION CELLULOSE SPECTROSCOPY OXIDATION FERRIHYDRITE ADSORBENTS MECHANISMS HEMATITE Tuning and Characterizing Nanocellulose Interface for Enhanced Removal of Dual-Sorbate (As-V and Cr-VI) from Water Matrices Article 10.1021/acssuschemeng.6b01874 1 ACS Sustainable Chemistry & Engineering, v.5, no.1, pp.518 - 528 ACS Sustainable Chemistry & Engineering 5 1 518 528 scie scopus 000391246000057 2-s2.0-85008512254 Chemistry, Multidisciplinary Green & Sustainable Science & Technology Engineering, Chemical Chemistry Science & Technology - Other Topics Engineering Article SURFACE COMPLEXATION METAL-CATECHOLATE ADSORPTION CELLULOSE SPECTROSCOPY OXIDATION FERRIHYDRITE ADSORBENTS MECHANISMS HEMATITE Dopamine Heavy metals Hematite Nanocellulose Water treatment