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Cost-efficient collagen fibrous aerogel cross-linked by Fe (III) /silver nanoparticle complexes for simultaneously degrading antibiotics, eliminating antibiotic-resistant bacteria, and adsorbing heavy metal ions from wastewater.
- Source :
-
Separation & Purification Technology . Dec2022, Vol. 303, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- [Display omitted] • Sustainable and facile fabrication of collagen fibrous aerogels cross-linked by Fe (III) ions with silver nanoparticles. • Flexible AgNPs/Fe@CF aerogel exhibited excellent mechanical performance and softness. • Robust AgNPs/Fe@CF aerogel showed admirable efficiency for removal of antibiotic and ARB. • Reliable AgNPs/Fe@CF aerogel revealed effective adsorption ability for heavy metal ions. The development of antibacterial and catalytic adsorbents is an ideal strategy to simultaneously remove antibiotics, antibiotic-resistant bacteria, and heavy metal ions from wastewater. Herein, a porous and renewable aerogel was prepared as a lightweight adsorbent by using cost-efficient collagen fibers (CF) from the leather industry. Further, the complexes of Fe3+ ions with gallic acids modified silver nanoparticles (GA@AgNPs) were selected to sufficiently cross-link the hierarchical CF structure based on coordinated complexation, leading to good mechanical property of the resulted aerogel (AgNPs/Fe@CF). Benefiting from the incorporated AgNPs, AgNPs/Fe@CF aerogel exhibited high antibacterial activity against Tetracycline-resistant E. coli and Methicillin-resistant Staphylococcus aureus. Moreover, the cross-linked AgNPs could accelerate the redox cycle of Fe3+/Fe2+ by facilitating electron transfer and thus enhance the activation of peroxymonosulfate to produce more •OH and SO 4 •− radicals. Therefore, this AgNPs/Fe@CF aerogel demonstrated synergetic Fenton-like catalytic degradation efficiency for 5 different antibiotics (over 90 % within 30 min). In addition, abundant hydroxyl and carboxyl groups on collagen fibers endow desired capacity (greater than70 mg/g) to the porous aerogel, which is able to remove Cr (Ⅵ), Ni (Ⅱ), and Pb (Ⅱ). This study explores a new pathway for the construction of multifunctional aerogel materials for enhancing the purification of wastewater. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13835866
- Volume :
- 303
- Database :
- Academic Search Index
- Journal :
- Separation & Purification Technology
- Publication Type :
- Academic Journal
- Accession number :
- 159657405
- Full Text :
- https://doi.org/10.1016/j.seppur.2022.122209