Research Article
Poly (2-Acrylamido 2-Methyl 1-Propane Sulphonic Acid) Hydrogel for the Sorption Studies of Brilliant Green Dye: Isotherm and Thermodynamic Studies
Issue:
Volume 10, Issue 1, June 2026
Pages:
1-12
Received:
1 December 2025
Accepted:
16 December 2025
Published:
16 January 2026
DOI:
10.11648/j.jcebe.20261001.11
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Abstract: Poly (2-acrylamido-2-methyl-1-propane sulphonic acid) [PAMPS] hydrogel was synthesized via free radical polymerization using 2-Acrylamido 2-methyl 1-propane sulphonic acid (AMPS) monomer, N, N-Methylenebisacrylamide (MBAA) cross-linker and potassium per sulphate (KPS) as the initiator and evaluated as an efficient adsorbent for the removal of Brilliant Green (BG) dye from aqueous solutions. Batch sorption experiments were conducted to investigate the influence of key operational parameters, such as pH, temperature, initial concentration of dye and sorbent doses. Equilibrium data were analyzed using common adsorption isotherm models and sorption isotherm data was found to fit best with the Dubinin-Radushkevich model with the highest correlation (R2=0.9808) at the temperature of 37.5°C. Thermodynamic parameters such as Gibbs free energy (ΔG°), enthalpy (ΔH°), and entropy (ΔS°) were determined to elucidate the nature of the adsorption process. The positive Gibbs free energy (ΔG°) suggesting non-spontaneous process and a positive enthalpy change (ΔH°= 0.003 kJ/ mol), indicating an endothermic process. The maximum sorption capacity was observed at 37.5°C with a removal efficiency up to 97.28% under optimized conditions. In addition, desorption studies using different types of solvents revealed the impact of the nature of the solvents on this sort of surface phenomenon. Overall, the findings demonstrate that PAMPS hydrogel is a promising and thermally responsive adsorbent for the effective removal of Brilliant Green dye, highlighting its potential application in wastewater treatment.
Abstract: Poly (2-acrylamido-2-methyl-1-propane sulphonic acid) [PAMPS] hydrogel was synthesized via free radical polymerization using 2-Acrylamido 2-methyl 1-propane sulphonic acid (AMPS) monomer, N, N-Methylenebisacrylamide (MBAA) cross-linker and potassium per sulphate (KPS) as the initiator and evaluated as an efficient adsorbent for the removal of Brill...
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,
Md. Anamul Haque,
Md. Towsif-Ur-Rahman
