Scholarlink

<p>This study explores the removal of methyl orange (MO) dye from aqueous solutions using electrospun poly(ε-caprolactone)/polyethyleneimine (PCL/PEI) nanofibers, highlighting their potential as a reusable and efficient adsorbent. Process optimization was performed using Box–Behnken design (BBD), chosen for its efficiency in evaluating interactions among key parameters—pH, contact time, initial dye concentration, and adsorbent dosage—with minimal experimental runs. The statistical model identified pH and adsorbent dosage as the most influential factors. At optimal conditions (pH 3.8, 230 min, 35 ppm MO, 0.58 g/L adsorbent), the nanofibers achieved 98% removal efficiency. Adsorption behavior fit the Langmuir isotherm and pseudo-second-order kinetic model, with a maximum adsorption capacity of 357.14 mg/g, surpassing many comparable adsorbents. Thermodynamic analysis confirmed the process as spontaneous and exothermic. Furthermore, the nanofibers retained over 90% efficiency after four regeneration cycles, indicating promising reusability. These findings demonstrate the practical potential of PCL/PEI nanofibers for dye-contaminated wastewater treatment and offer mechanistic insights for further material development.</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

Optimized Methyl Orange Adsorption on Electrospun Poly(ε-caprolactone)/Polyethyleneimine Nanofibers: Kinetics, Isotherms, and Thermodynamic Insights

  • 期刊论文

  • 发表日期：

    2025年12月1日

查看全文
  • Fereshteh Amini,
  • Hamid Delavari,
  • Shahrokh Ghovvati,
  • Reza Poursalehi

摘要

This study explores the removal of methyl orange (MO) dye from aqueous solutions using electrospun poly(ε-caprolactone)/polyethyleneimine (PCL/PEI) nanofibers, highlighting their potential as a reusable and efficient adsorbent. Process optimization was performed using Box–Behnken design (BBD), chosen for its efficiency in evaluating interactions among key parameters—pH, contact time, initial dye concentration, and adsorbent dosage—with minimal experimental runs. The statistical model identified pH and adsorbent dosage as the most influential factors. At optimal conditions (pH 3.8, 230 min, 35 ppm MO, 0.58 g/L adsorbent), the nanofibers achieved 98% removal efficiency. Adsorption behavior fit the Langmuir isotherm and pseudo-second-order kinetic model, with a maximum adsorption capacity of 357.14 mg/g, surpassing many comparable adsorbents. Thermodynamic analysis confirmed the process as spontaneous and exothermic. Furthermore, the nanofibers retained over 90% efficiency after four regeneration cycles, indicating promising reusability. These findings demonstrate the practical potential of PCL/PEI nanofibers for dye-contaminated wastewater treatment and offer mechanistic insights for further material development.