Experimental and computational study of removal of methyl green and eosin yellow from aqueous solutions using novel sulfamic and sulfanilic acid grafted chitosan-epichlorohydrin -Fe 2 O 3 nanocomposites.

Autor: Kor H; Department of Chemical Engineering, Faculty of Engineering, Golestan University, Aliabad Katoul, Iran., Karimian H; Department of Chemical Engineering, Faculty of Engineering, Golestan University, Aliabad Katoul, Iran. Electronic address: h.karimian@gu.ac.ir., Khalaji AD; Department of Chemistry, Faculty of Sciences, Golestan University, Gorgan, Iran.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2024 Dec; Vol. 282 (Pt 3), pp. 137036. Date of Electronic Publication: 2024 Oct 29.
DOI: 10.1016/j.ijbiomac.2024.137036
Abstrakt: Two novel chitosan-based adsorbents, sulfamic acid-chitosan-epichlorohydrin-Fe 2 O 3 (HK-1) and sulfanilic acid-chitosan-epichlorohydrin-Fe 2 O 3 (HK-2), were successfully synthesized and characterized by XRD, TGA, DSC, BET, and SEM techniques. The ability of the synthesized adsorbents for removing cationic Methyl Green (MG) and anionic Eosin Yellow (EY) from aqueous solutions was investigated at different solution pHs, adsorbent dosages, and contact times. The results showed a removal efficiency of 93.5 % and 96.8 % for adsorbing cationic MG respectively by HK-1 and HK-2 at pH = 8. The removal efficiency for adsorbing anionic EY by HK-1 and HK-2 was respectively 90.8 % and 94.6 % at pH = 3. The results also showed that >50 % of MG was adsorbed within the first 30 min of contact with HK-1 and HK-2, but it took about 75 and 45 min to adsorb 50 % of EY respectively by HK-1 and HK-2. DFT calculations confirmed the spontaneous adsorption of EY and MG on the surface of HK-1 and HK-2. These promising results suggest that HK-1 and HK-2 can be used to remove other cationic and anionic dyes from aqueous solutions.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: