Enhancing arsenic adsorption via excellent dispersion of iron oxide nanoparticles inside poly(vinyl alcohol) nanofibers
| Autor: | Cristián Huck-Iriart, Patricia C. Rivas-Rojas, Aitor Larrañaga, Silvina Cerveny, Alicia Vergara-Rubio, Alicia Fernández-Cirelli, Silvia Goyanes, Nicolas Torasso |
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| Přispěvatelé: | Universidad de Buenos Aires, Agencia Nacional de Promoción Científica y Tecnológica (Argentina), Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission |
| Rok vydání: | 2021 |
| Předmět: |
Vinyl alcohol
Materials science Poly(vinyl alcohol) Nanofibers Nanoparticle 02 engineering and technology 010501 environmental sciences 01 natural sciences Dispersant chemistry.chemical_compound Iron oxide nanoparticles Adsorption Chemical Engineering (miscellaneous) Waste Management and Disposal 0105 earth and related environmental sciences Process Chemistry and Technology 021001 nanoscience & nanotechnology Pollution Electrospinning chemistry Chemical engineering Nanofiber 0210 nano-technology Dispersion (chemistry) |
| Zdroj: | Digital.CSIC: Repositorio Institucional del CSIC Consejo Superior de Investigaciones Científicas (CSIC) Digital.CSIC. Repositorio Institucional del CSIC instname |
| DOI: | 10.13039/501100011033 |
| Popis: | Superparamagnetic iron oxide nanoparticles (SPIONs) are great adsorbents of toxic arsenic in water. However, SPIONs efficiency is limited by a tendency towards agglomeration, and an extra filtering process is required in actual applications to avoid possible harmful effects of nanoparticles released to the environment. Here, we show a novel green method to confine and disperse SPIONs (10 nm) inside insoluble electrospun PVA nanofibers (final concentration 0.14 wt. %). We found that the resulting membrane has an enhanced arsenic adsorption capacity (> 52 mg/g) and presents a new adsorption mechanism, involving a high swelling of the superhydrophilic nanofibers before actual solution interchange can occur. A suitable heat treatment provided water insolubility to the membrane while maintaining hydrophilicity and active sites in the SPIONs. We show the excellent dispersion and homogeneous distribution of the SPIONs inside the nanofibers using electron microscopies and scale this analysis to an area of statistical significance via magnetic studies and novel Small and Wide Angle X-Ray Scattering SAXS/WAXS 2D scannings. The production process is environmentally friendly, given that only PVA was used as SPIONs dispersant and no chemicals were added for crosslinking. This work presents a novel material that expands the broad technological applications of both iron oxide nanoparticles and electrospinning, opening a route to new horizons in water purification. We kindly acknowledge the financial support of UBA (UBACYT 2018-2020 No 20020170100381BA), ANPCyT (PICT 2017-2362, PICT 2017-3150) and the Ministerio de Ciencia, Innovación y Universidades code PID2019-104650GB-C21 (MCIU/AEI/FEDER, UE). |
| Databáze: | OpenAIRE |
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