Synthesis of Poly(GG- co -AAm- co -MAA), a Terpolymer Hydrogel for the Removal of Methyl Violet and Fuchsin Basic Dyes from Aqueous Solution.

Autor:	Khan S; Department of Biochemistry, University of Malakand, Chakdara Dir Lower, KPK 18800, Pakistan.; Department of Biochemistry, University of Malakand, Chakdara Dir Lower, KPK 18800, Pakistan., Rahman NU; Department of Biochemistry, University of Malakand, Chakdara Dir Lower, KPK 18800, Pakistan.; Department of Biochemistry, University of Malakand, Chakdara Dir Lower, KPK 18800, Pakistan., Alam S; Department of Biochemistry, University of Malakand, Chakdara Dir Lower, KPK 18800, Pakistan.; Department of Biochemistry, University of Malakand, Chakdara Dir Lower, KPK 18800, Pakistan., Zahoor M; Department of Biochemistry, University of Malakand, Chakdara Dir Lower, KPK 18800, Pakistan.; Department of Biochemistry, University of Malakand, Chakdara Dir Lower, KPK 18800, Pakistan., Shah LA; National Center of Excellence in Physical Chemistry (NCE), University of Peshawar, Nowshera 25120, Pakistan., Umar MN; Department of Chemistry, University of Liverpool, Liverpool L69 3BX, U.K., Ullah R; Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia.
Jazyk:	angličtina
Zdroj:	ACS omega [ACS Omega] 2024 Feb 05; Vol. 9 (7), pp. 7692-7704. Date of Electronic Publication: 2024 Feb 05 (Print Publication: 2024).
DOI:	10.1021/acsomega.3c07118
Abstrakt:	A novel adsorbent designated as terpolymer hydrogel (gellan gum- co -acrylamide- co -methacrylic acid) was prepared by free radical polymerization of gellan gum (GG), methacrylic acid (MAA), and acrylamide (AAm) using N , N -methylene bis-acrylamide (MBA) as cross-linker and ammonium per sulfate (APS) as the initiator of the reaction. The synthesized gel was characterized by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), and thermogravimetric analysis (TGA) and was used for the adsorptive removal of methyl violet (MV) and Fuchsin Basic (FB) dyes from aqueous solution. The effect of temperature, contact time, pH, and concentration on them under the study adsorption process was evaluated. Freundlich isotherm and pseudo-second-order kinetic models were found to be best in fitting the isothermal and kinetics data. The water diffusion and % swelling of hydrogel were studied at various pH in distilled water and at neutral pH in tap water. The diffusion was found to be of Fickian type with a maximum swelling of 5132%. The maximum adsorption capacity was 233 mg/g against MV and 200 mg/g against FB dyes. The swelling and adsorption were pH dependent and increased with increase in pH. The enthalpy, Gibbs free energy, and entropy changes of adsorption for both the dyes indicated the adsorption process to be exothermic, feasible, and spontaneous. The hydrogel was successfully regenerated using acetone and distilled water for five cycles and still, its dye removal efficiency was 80% of its original value. The poly(GG- co -AAm- co -MAA) hydrogel successfully removed the selected dyes from water and could thus be used as an efficient alternative sorbent for cationic dye removal from aqueous solutions. Competing Interests: The authors declare no competing financial interest. (© 2024 The Authors. Published by American Chemical Society.)
Databáze:	MEDLINE
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