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<p>In this study, acrylic acid (AA) was graft copolymerized onto Guggul gum (GgG) using N, N-methylenebisacrylamide, and ammonium persulfate as the crosslinker-initiator system for the removal of methylene blue (MB) dye from aqueous solutions. The as-prepared and dye-adsorbed hydrogel samples were characterized using Fourier Transform Infrared spectroscopy, rheological studies, and Brunauer–Emmett–Teller surface area analysis. Adsorption experiments were conducted with cationic MB dye to evaluate the adsorption capabilities of the synthesized hydrogel. Various parameters, such as solution pH, adsorbent mass, dye concentration, contact time, and temperature, were varied to determine their effects on removal efficiency. The pseudo-second-order and Freundlich isotherm also provided a good fit for the adsorption process with a maximum adsorption capacity of 59.4884&#xa0;mg/g. Thermodynamic analysis indicated that the adsorption process was endothermic, spontaneous, and accompanied by increased randomness. The hydrogel maintained 98% adsorption efficiency after 10 consecutive adsorption/desorption cycles. Therefore, the higher swelling rate, improved adsorption capacity, environmental friendliness, low cost, and regeneration capability of the GgG-cl-poly(AA) hydrogel make it a promising material for removing MB dye from aqueous solutions.</p>

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Efficient removal of methylene blue dye from aqueous media via acrylic acid grafted Guggul gum-based hydrogel

  • 期刊论文

  • 发表日期：

    2025年3月10日

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  • Shabnum Saleem,
  • Sonal Choudhary,
  • Kashma Sharma,
  • Vishal Sharma,
  • Vaneet Kumar,
  • Vijay Kumar

摘要

In this study, acrylic acid (AA) was graft copolymerized onto Guggul gum (GgG) using N, N-methylenebisacrylamide, and ammonium persulfate as the crosslinker-initiator system for the removal of methylene blue (MB) dye from aqueous solutions. The as-prepared and dye-adsorbed hydrogel samples were characterized using Fourier Transform Infrared spectroscopy, rheological studies, and Brunauer–Emmett–Teller surface area analysis. Adsorption experiments were conducted with cationic MB dye to evaluate the adsorption capabilities of the synthesized hydrogel. Various parameters, such as solution pH, adsorbent mass, dye concentration, contact time, and temperature, were varied to determine their effects on removal efficiency. The pseudo-second-order and Freundlich isotherm also provided a good fit for the adsorption process with a maximum adsorption capacity of 59.4884 mg/g. Thermodynamic analysis indicated that the adsorption process was endothermic, spontaneous, and accompanied by increased randomness. The hydrogel maintained 98% adsorption efficiency after 10 consecutive adsorption/desorption cycles. Therefore, the higher swelling rate, improved adsorption capacity, environmental friendliness, low cost, and regeneration capability of the GgG-cl-poly(AA) hydrogel make it a promising material for removing MB dye from aqueous solutions.