Scholarlink

<p>In response to the dual environmental challenge posed by the escalating issue of white pollution and dye wastewater, a functionalised adsorbent material (HPB-PEPA) was successfully synthesised through Friedel–Crafts acylation with waste polystyrene (WPS) and 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA), followed by amidation with polyethylenepolyamine (PEPA). This material exhibits a distinct porous structure with a specific surface area of 65.06 m<sup>2</sup>/g and an average pore diameter of 32.65&#xa0;nm. The adsorption performance of HPB-PEPA was systematically evaluated using the anionic dyes congo red (CR) and methyl blue (MB) as target pollutants. Results indicate that at 318.15&#xa0;K, its maximum saturation adsorption capacities for CR and MB reached 2751.17&#xa0;mg/g and 2800.03&#xa0;mg/g respectively, significantly outperforming most currently reported adsorbents. Adsorption behaviour conformed to the Freundlich isotherm model and pseudo-second-order kinetic model, indicating a heterogeneous multilayer adsorption process dominated by chemical interactions. Thermodynamic parameter analysis indicates the adsorption process is spontaneous, endothermic, and entropy-increasing, possessing favourable thermodynamic driving forces. Cyclic adsorption–desorption experiments demonstrated HPB-PEPA's excellent regenerative capacity and stability. Within binary mixed systems comprising CR/crystal violet (CV) and MB/rhodamine B (RhB), HPB-PEPA exhibited outstanding selective adsorption capabilities, enabling efficient recognition and separation of target anions, thereby showcasing considerable practical application potential. This research not only provides a novel pathway for the high-value utilisation of waste foam plastics but also offers a feasible strategy and new material design concept for the targeted removal of pollutants in complex dye wastewater.</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

Preparation of Polyethylenepolyamine Crosslinked Acylated Waste Polystyrene Adsorbent for Efficient Adsorption of Congo Red and Methyl Blue

  • 期刊论文

  • 发表日期：

    2026年4月28日

查看全文
  • Yiping Wen,
  • Mengyao Zhao,
  • Zhengfeng Xie,
  • Changsong Liu,
  • Hongchao Shang,
  • Hao Zeng,
  • Songsong Xue,
  • Le Zhang

摘要

In response to the dual environmental challenge posed by the escalating issue of white pollution and dye wastewater, a functionalised adsorbent material (HPB-PEPA) was successfully synthesised through Friedel–Crafts acylation with waste polystyrene (WPS) and 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA), followed by amidation with polyethylenepolyamine (PEPA). This material exhibits a distinct porous structure with a specific surface area of 65.06 m2/g and an average pore diameter of 32.65 nm. The adsorption performance of HPB-PEPA was systematically evaluated using the anionic dyes congo red (CR) and methyl blue (MB) as target pollutants. Results indicate that at 318.15 K, its maximum saturation adsorption capacities for CR and MB reached 2751.17 mg/g and 2800.03 mg/g respectively, significantly outperforming most currently reported adsorbents. Adsorption behaviour conformed to the Freundlich isotherm model and pseudo-second-order kinetic model, indicating a heterogeneous multilayer adsorption process dominated by chemical interactions. Thermodynamic parameter analysis indicates the adsorption process is spontaneous, endothermic, and entropy-increasing, possessing favourable thermodynamic driving forces. Cyclic adsorption–desorption experiments demonstrated HPB-PEPA's excellent regenerative capacity and stability. Within binary mixed systems comprising CR/crystal violet (CV) and MB/rhodamine B (RhB), HPB-PEPA exhibited outstanding selective adsorption capabilities, enabling efficient recognition and separation of target anions, thereby showcasing considerable practical application potential. This research not only provides a novel pathway for the high-value utilisation of waste foam plastics but also offers a feasible strategy and new material design concept for the targeted removal of pollutants in complex dye wastewater.