Journal
CARBOHYDRATE POLYMERS
Volume 234, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.115889
Keywords
Cellulose nanocrystal; Fe-Cu alloy; Antibacterial activity; Adsorption kinetic; Heavy metal
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Funding
- Zhejiang Provincial Natural Science key Foundation of China [LZ20E030003]
- Fundamental Research Funds of Zhejiang Sci-Tech University [2019Q001]
- Candidates of Young and Middle-Aged Academic Leader of Zhejiang Province
- Young Elite Scientists Sponsorship Program by CAST [2018QNRC001]
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We report a facile method to prepare a novel composite based on Fe-Cu alloy decorated cellulose nanocrystals (Fe-Cu@CNC) via simple oxidation-reduction reaction. Spherical zero-valent iron nanoparticles (NZVI) and sheet-like copper nanoparticles were serially anchored on the CNC surface, and the generated composite exhibited excellent antibacterial activities and highly efficient Pb2+ removal. The composites had high antibacterial ratios of 95.9 %-99.9 %, because superoxide radicals can cause irreversible damage to the bacteria, eventually leading to apoptosis and bacterial death. Meanwhile, the Fe-Cu@CNC composite showed quick Pb2+ ion removal, reaching a 70.76 % removal within 5 min, a total removal of 93.98 % after 1 h, and excellent reusability (retaining removal efficiency of 80.41 % after six cycles). The adsorption kinetics demonstrated that the adsorption behavior can be described by pseudo-second-order kinetic model (R-2 > 0.99). This study offers a new strategy to prepare a promising composite with advanced antibacterial and heavy metal removal properties for wastewater treatment.
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