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Novel magnetic Fe@NSC nanohybrid material for arsenic removal from aqueous media

Authors
Kalimuthu, PandiKim, YoujinSubbaiah, Muthu PrabhuJeon, Byong-HunJung, Jinho
Issue Date
12월-2022
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
Adsorption; Arsenic; Magnetic nanohybrid; Polyaniline-derived carbon
Citation
CHEMOSPHERE, v.308
Indexed
SCIE
SCOPUS
Journal Title
CHEMOSPHERE
Volume
308
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/145449
DOI
10.1016/j.chemosphere.2022.136450
ISSN
0045-6535
Abstract
Polymer-derived carbon nanohybrids present a remarkable potential for the elimination of water pollutants. Herein, an Fe-modified C, N, and S (Fe@NSC) nanohybrid network, synthesized via polymerization of aniline followed by calcination, is used for As removal from aquatic media. The Langmuir isotherm and pseudo-second -order kinetic models fit well the experimental data for the adsorptive removal of As(III) and As(V) by the as -synthesized Fe@NSC nanohybrid, indicating that adsorption is a monolayer chemisorption process. The maximum adsorption capacities of the fabricated Fe@NSC nanohybrid for As(III) and As(V) were 129.54 and 178.65 mg/g, respectively, which are considerably higher than those reported previously for other adsorbents. In particular, the Fe3O4/FeS nanoparticles (18.4-38.7 nm) of the prepared Fe@NSC nanohybrid play a critical role in As adsorption and oxidation. Spectroscopy data indicate that the adsorption of As on Fe@NSC nanohybrid involved oxidation, ligand exchange, surface complexation, and electrostatic attraction. Furthermore, the magnetic Fe@NSC nanohybrid was easily separated after As adsorption using an external magnet and did not induce acute toxicity (48 h) in Daphnia magna. Moreover, the Fe@NSC nanohybrid selectively removed As species in the presence of competing anions and was effectively regenerated for up to three cycles using a 0.1 M
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JUNG, Jin ho
생명과학대학 (환경생태공학부)
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