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Article

Highly Efficient Iron Oxide Nanoparticles Immobilized on Cellulose Nanofibril Aerogels for Arsenic Removal from Water

1
Laboratory of Renewable Nanomaterials, School of Forest Resources, University of Maine, 5755 Nutting Hall, Orono, ME 04469, USA
2
Department of Civil, Environmental and Sustainable Engineering, Santa Clara University, 500 El Camino Real, Santa Clara, CA 95053, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Zheng Ling
Nanomaterials 2021, 11(11), 2818; https://doi.org/10.3390/nano11112818
Received: 6 October 2021 / Revised: 18 October 2021 / Accepted: 19 October 2021 / Published: 23 October 2021
(This article belongs to the Special Issue Application of Nanomaterials and Nanotechnology in Water Treatment)
The application and optimal operation of nanoparticle adsorbents in fixed-bed columns or industrial-scale water treatment applications are limited. This limitation is generally due to the tendency of nanoparticles to aggregate, the use of non-sustainable and inefficient polymeric resins as supporting materials in fixed-bed columns, or low adsorption capacity. In this study, magnesium-doped amorphous iron oxide nanoparticles (IONPs) were synthesized and immobilized on the surface of cellulose nanofibrils (CNFs) within a lightweight porous aerogel for arsenic removal from water. The IONPs had a specific surface area of 165 m2 g−1. The IONP-containing CNF aerogels were stable in water and under constant agitation due to the induced crosslinking using an epichlorohydrin crosslinker. The adsorption kinetics showed that both As(III) and As(V) adsorption followed a pseudo second-order kinetic model, and the equilibrium adsorption isotherm was best fitted using the Langmuir model. The maximum adsorption capacities of CNF-IONP aerogel for As(III) and As(V) were 48 and 91 mg As g-IONP−1, respectively. The optimum IONP concentration in the aerogel was 12.5 wt.%, which resulted in a maximum arsenic removal, minimal mass loss, and negligible leaching of iron into water. View Full-Text
Keywords: cellulose nanofibrils; iron oxide nanoparticles; aerogel; arsenic; water treatment cellulose nanofibrils; iron oxide nanoparticles; aerogel; arsenic; water treatment
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MDPI and ACS Style

Rahman, M.M.; Hafez, I.; Tajvidi, M.; Amirbahman, A. Highly Efficient Iron Oxide Nanoparticles Immobilized on Cellulose Nanofibril Aerogels for Arsenic Removal from Water. Nanomaterials 2021, 11, 2818. https://doi.org/10.3390/nano11112818

AMA Style

Rahman MM, Hafez I, Tajvidi M, Amirbahman A. Highly Efficient Iron Oxide Nanoparticles Immobilized on Cellulose Nanofibril Aerogels for Arsenic Removal from Water. Nanomaterials. 2021; 11(11):2818. https://doi.org/10.3390/nano11112818

Chicago/Turabian Style

Rahman, Md M., Islam Hafez, Mehdi Tajvidi, and Aria Amirbahman. 2021. "Highly Efficient Iron Oxide Nanoparticles Immobilized on Cellulose Nanofibril Aerogels for Arsenic Removal from Water" Nanomaterials 11, no. 11: 2818. https://doi.org/10.3390/nano11112818

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