Successful preparation of tercopolymer hydrogel for the removal of toluidine dye from contaminated water: Experimental and DFT study

Jabeen, Salma; Alam, Sultan; Shah, Luqman Ali; Ullah, Mohib

doi:10.1080/01496395.2023.2221815

Cited by 4 publications

(6 citation statements)

References 38 publications

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“…Employing the Brunauer–Emmett–Teller (BET) method, the specific surface area of the poly(GG- co -AAm- co -MAA) hydrogel (Table ) was determined to be 19.152 m 2 /g. Additionally, the BJH and DR methods were employed for pore size calculations, aligning with the values reported for other comparable hydrogels in the literature. , …”

Section: Results and Discussionmentioning

confidence: 95%

“…Additionally, the BJH and DR methods were employed for pore size calculations, aligning with the values reported for other comparable hydrogels in the literature. 40,41 3.2. Swelling Study.…”

Section: Resultsmentioning

confidence: 99%

“…The calculated kinetic parameters based on the experimental data at different time intervals provide an understanding of the feasibility of the adsorption process . Four different types of kinetic models were applied to analyze the adsorption kinetics, namely, the pseudo-first order (Figure a), pseudo-second order (Figure b), Elovich (Figure c), and intraparticle diffusion models (Figure d) for MV and, similarly, Figure a–d for FB using eqs – log ( q normale − q t ) = log nobreak0em0.25em⁡ q e − k 1 t 2.303 t q t = t q normale + 1 k 2 q e 2 q t = ln nobreak0em0.25em⁡ β α α + ln nobreak0em0.25em⁡ t β q t = K id t 1 / 2 + C …”

Section: Results and Discussionmentioning

confidence: 99%

“…Various isotherm models like Freundlich, Langmuir, and Temkin isotherms were employed, and their parameters were calculated to evaluate the surface characteristics and attraction of the hydrogels for dye adsorption. These isotherm models provide an understanding about the interactions between the adsorbate and adsorbent and tell us about the adsorption capacities. , The maximum adsorption capacity calculated was 233 mg/g (98.9%) for MV and 200 mg/g (98.9%) for FB dyes. The Langmuir isotherm model, represented by eq , elucidates the sorption process taking place at the hydrogel surface and provides information about monolayer adsorption.…”

Section: Results and Discussionmentioning

confidence: 99%

“…These isotherm models provide an understanding about the interactions between the adsorbate and adsorbent and tell us about the adsorption capacities. 41,46 The maximum adsorption capacity calculated was 233 mg/g (98.9%) for MV and 200 mg/g (98.9%) for FB dyes. The Langmuir isotherm model, represented by eq 9, elucidates the sorption process taking place at the hydrogel surface and provides information about monolayer adsorption.…”

Section: Isotherm Studymentioning

confidence: 97%

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

Khan,

Rahman,

Alam

et al. 2024

ACS Omega

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A novel adsorbent designated as terpolymer hydrogel (gellan gum-coacrylamide-co-methacrylic acid) was prepared by free radical polymerization of gellan gum (GG), methacrylic acid (MAA), and acrylamide (AAm) using N,N-methylene bisacrylamide (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.

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Section: Results and Discussionmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%