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<p>As an important intermediate, <i>p</i>-nitrophenol has been widely used in the production of various chemicals, including pharmaceuticals, insecticides, and dyes, etc. However, it exhibits significant ecological toxicity and has a tendency to accumulate in organisms, even at very low concentrations. Therefore, it is essential to remove <i>p</i>-nitrophenol as thoroughly as possible from wastewater before discharging it into the environment. Among various treatment methods, physical adsorption stands out as a safe, reliable, and widely applicable approach, particularly suitable for small-scale water treatment applications. In this study, a melamine/terephthalaldehyde-based material (PMT) with a rich mesoporous structure was synthesized. The presence of abundant nitrogen elements within the material’s structure enhances its adsorption capacity for <i>p</i>-nitrophenol. Subsequently, PMT was dispersed as the dispersed phase into a hydrogel (HGel) structure through post-polymerization, which improved the material’s stability during use. Experimental results demonstrated that the gel composite material achieved a 97.6% adsorption removal rate for <i>p</i>-nitrophenol-contained wastewater. Moreover, after six cycles of reuse, the material retained an adsorption removal rate of 84.2%, highlighting its excellent adsorption performance and reusability.</p>

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Hydroxyethyl Cellulose Gel-Loaded Melamine/Terephthalaldehyde Mesoporous Materials for p-Nitrophenol Removal in Low-Concentration Wastewater

  • 期刊论文

  • 发表日期：

    2025年10月3日

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  • Shoucun Zhang,
  • Zhuomin Li,
  • Ning Yang,
  • Wenli Wu,
  • Yuan Wang

摘要

As an important intermediate, p-nitrophenol has been widely used in the production of various chemicals, including pharmaceuticals, insecticides, and dyes, etc. However, it exhibits significant ecological toxicity and has a tendency to accumulate in organisms, even at very low concentrations. Therefore, it is essential to remove p-nitrophenol as thoroughly as possible from wastewater before discharging it into the environment. Among various treatment methods, physical adsorption stands out as a safe, reliable, and widely applicable approach, particularly suitable for small-scale water treatment applications. In this study, a melamine/terephthalaldehyde-based material (PMT) with a rich mesoporous structure was synthesized. The presence of abundant nitrogen elements within the material’s structure enhances its adsorption capacity for p-nitrophenol. Subsequently, PMT was dispersed as the dispersed phase into a hydrogel (HGel) structure through post-polymerization, which improved the material’s stability during use. Experimental results demonstrated that the gel composite material achieved a 97.6% adsorption removal rate for p-nitrophenol-contained wastewater. Moreover, after six cycles of reuse, the material retained an adsorption removal rate of 84.2%, highlighting its excellent adsorption performance and reusability.