Scholarlink

<p>This study presents the synthesis and performance evaluation of a novel smart hydrogel, Jhingan gum-graft-poly(acrylamide-co-vinyl acetate) abbreviated as Jh-g-(PAAm-co-PVAc), prepared via microwave-assisted free radical polymerization using Jhingan gum as a natural, biodegradable backbone for the efficient adsorption of crystal violet (CV) dye from aqueous solution. The synthesized hydrogel was characterized using Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffraction (XRD) and scanning electron microscopy (SEM), confirming successful grafting, structural stability, and a porous surface morphology favorable for adsorption. Under optimized conditions including pH (9.2), temperature (30&#xa0;°C), hydrogel dose (20&#xa0;mg), and dye concentration (100&#xa0;mg/L), the hydrogel exhibited a maximum adsorption capacity of 70.53 ± 0.51&#xa0;mg/g. Kinetic data were best described by the pseudo-first-order model, while equilibrium results fit best with the Temkin isotherm, suggesting a multilayer physisorption process. The adsorption mechanism was primarily governed by electrostatic attraction, hydrogen bonding, and π–π interactions between the dye and hydrogel surface. Thermodynamic analyses indicated a spontaneous and exothermic adsorption process. The hydrogel maintained reusability across five adsorption–desorption cycles, showing approximately a 25% reduction in adsorption efficiency, with the highest desorption observed at pH 2.2. These results demonstrate that Jh-g-(PAAm-co-PVAc) hydrogel is a sustainable, efficient, and regenerable adsorbent for the removal of cationic dyes such as CV, underscoring its potential for application in eco-friendly wastewater treatment systems.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Smart hydrogel system based on Jhingan gum for enhanced crystal violet dye sequestration: synthesis, characterization, and environmental application

  • 期刊论文

  • 发表日期：

    2025年12月10日

查看全文
  • Gurupreet Kaur,
  • Sinderpal Kabalsingh Tank

摘要

This study presents the synthesis and performance evaluation of a novel smart hydrogel, Jhingan gum-graft-poly(acrylamide-co-vinyl acetate) abbreviated as Jh-g-(PAAm-co-PVAc), prepared via microwave-assisted free radical polymerization using Jhingan gum as a natural, biodegradable backbone for the efficient adsorption of crystal violet (CV) dye from aqueous solution. The synthesized hydrogel was characterized using Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffraction (XRD) and scanning electron microscopy (SEM), confirming successful grafting, structural stability, and a porous surface morphology favorable for adsorption. Under optimized conditions including pH (9.2), temperature (30 °C), hydrogel dose (20 mg), and dye concentration (100 mg/L), the hydrogel exhibited a maximum adsorption capacity of 70.53 ± 0.51 mg/g. Kinetic data were best described by the pseudo-first-order model, while equilibrium results fit best with the Temkin isotherm, suggesting a multilayer physisorption process. The adsorption mechanism was primarily governed by electrostatic attraction, hydrogen bonding, and π–π interactions between the dye and hydrogel surface. Thermodynamic analyses indicated a spontaneous and exothermic adsorption process. The hydrogel maintained reusability across five adsorption–desorption cycles, showing approximately a 25% reduction in adsorption efficiency, with the highest desorption observed at pH 2.2. These results demonstrate that Jh-g-(PAAm-co-PVAc) hydrogel is a sustainable, efficient, and regenerable adsorbent for the removal of cationic dyes such as CV, underscoring its potential for application in eco-friendly wastewater treatment systems.