Scholarlink

<p>Water scarcity and declining water quality, made worse by pharmaceutical waste, pose significant challenges worldwide. There is a high demand to eliminate such contaminants from wastewater. In this study, authors have synthesized a Gum acacia-<i>g</i>-poly (N,N-dimethylacrylamide)/CoFe<sub>2</sub>O<sub>4</sub> nanocomposite hydrogel adsorbent by free radical polymerization technique using N,N-dimethylacrylamide (DMA) monomer, and cobalt ferrite (CF) nanofillers. The structural, morphological, and thermal properties of the synthesized nanocomposite hydrogel were characterized by Fourier-transform infrared spectroscopy (FTIR), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), point zero charge (pH<sub>PZC</sub>)<sub>,</sub> Brunauer–Emmett–Teller (BET) analysis, and thermogravimetric analysis (TGA). XRD analysis revealed a semi crystalline structure with distinct peaks corresponding to CoFe<sub>2</sub>O<sub>4</sub>, indicating increased crystallinity upon adding CF nanoparticles. SEM images showed a porous surface morphology with CF dispersed throughout the hydrogel matrix, leading to an increased BET surface area of 0.7099 m<sup>2</sup>&#xa0;g<sup>−1</sup> compared to the hydrogel without nanofillers. The effectiveness of the GA-<i>g</i>-P(DMA)/CF nanocomposite hydrogel for removing the non-steroidal anti-inflammatory drug (NSAID) naproxen sodium (NS) from aqueous solutions was investigated. Adsorption experiments were conducted under various conditions including solution pH (2 − 11), adsorbent dose (10–100&#xa0;mg), initial drug concentration (25–200&#xa0;mg/L), contact time (2–24&#xa0;h), and temperature (20–60&#xa0;°C). The maximum adsorption capacity (<i>q</i><sub><i>max</i></sub>) of the hydrogel for NS was determined to be 344.827&#xa0;mg/g, and the Langmuir isotherm model provided the best fit for the experimental data. The pseudo-second-order kinetic model described the adsorption kinetics well. Electrostatic interactions and hydrogen bonding were identified as the main mechanisms for NS adsorption onto the hydrogel. Furthermore, adsorption − desorption studies demonstrated that the hydrogel could be efficiently recovered and reused for four consecutive runs without significant loss in adsorption performance.</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

Synthesis, Characterization, and Effective Adsorption of Naproxen Sodium from Wastewater Using Eco-Friendly Gum Acacia-Grafted-Poly(N,N-Dimethylacrylamide)/CoFe2O4 Hydrogel Nanocomposite

  • 期刊论文

  • 发表日期：

    2025年5月22日

查看全文
  • Pragnesh N. Dave,
  • Sanjay Bamaniya

摘要

Water scarcity and declining water quality, made worse by pharmaceutical waste, pose significant challenges worldwide. There is a high demand to eliminate such contaminants from wastewater. In this study, authors have synthesized a Gum acacia-g-poly (N,N-dimethylacrylamide)/CoFe2O4 nanocomposite hydrogel adsorbent by free radical polymerization technique using N,N-dimethylacrylamide (DMA) monomer, and cobalt ferrite (CF) nanofillers. The structural, morphological, and thermal properties of the synthesized nanocomposite hydrogel were characterized by Fourier-transform infrared spectroscopy (FTIR), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), point zero charge (pHPZC), Brunauer–Emmett–Teller (BET) analysis, and thermogravimetric analysis (TGA). XRD analysis revealed a semi crystalline structure with distinct peaks corresponding to CoFe2O4, indicating increased crystallinity upon adding CF nanoparticles. SEM images showed a porous surface morphology with CF dispersed throughout the hydrogel matrix, leading to an increased BET surface area of 0.7099 m2 g−1 compared to the hydrogel without nanofillers. The effectiveness of the GA-g-P(DMA)/CF nanocomposite hydrogel for removing the non-steroidal anti-inflammatory drug (NSAID) naproxen sodium (NS) from aqueous solutions was investigated. Adsorption experiments were conducted under various conditions including solution pH (2 − 11), adsorbent dose (10–100 mg), initial drug concentration (25–200 mg/L), contact time (2–24 h), and temperature (20–60 °C). The maximum adsorption capacity (qmax) of the hydrogel for NS was determined to be 344.827 mg/g, and the Langmuir isotherm model provided the best fit for the experimental data. The pseudo-second-order kinetic model described the adsorption kinetics well. Electrostatic interactions and hydrogen bonding were identified as the main mechanisms for NS adsorption onto the hydrogel. Furthermore, adsorption − desorption studies demonstrated that the hydrogel could be efficiently recovered and reused for four consecutive runs without significant loss in adsorption performance.