In this study, a flexible multifunctional fibrous membrane for heterogeneous Fenton-like removal of organic and pathogenic contaminants from wastewater was developed by immobilizing zerovalent iron nanoparticles (Fe-NPs) on an amine/thiol grafted polyester membrane. Full characterization of the resulting polyester membranes allowed validation of successful grafting of amine/thiol (NH₂ or SH) functional groups and immobilization of Fe-NPs (50–150 nm). The Fenton-like functionality of iron immobilized fibrous membranes (PET–Fe, PET–Si–NH₂–Fe, PET–NH₂–Fe, and PET–SH–Fe) in the presence of hydrogen peroxide (H₂O₂) was comparatively studied in the removal of crystal violet dye (50 mg L⁻¹). The effect of pH, amount of iron and H₂O₂ concentration on dye removal was systematically investigated. The highest dye removal yield reached 98.87% in 22 min at a rate constant 0.1919 min⁻¹ (R² = 95.36) for PET–SH–Fe providing 78% toxicity reduction assessed by COD analysis. These membranes could be reused for up to seven repeated cycles. Kinetics and postulated mechanism of colour removal were proposed by examining the above results. In addition, the resultant membranes showed substantial antibacterial activity against pathogenic bacteria (Staphylococcus epidermidis, Escherichia coli) strains studied through disc diffusion-zone inhibitory and optical density analysis. These findings are of great importance because they provide a prospect of textile-based flexible catalysts in heterogeneous Fenton-like systems for environmental and green chemistry applications.

中文翻译：

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去除有机和病原污染物的纤维膜改性：从设计到应用

在这项研究中，通过将零价铁纳米颗粒 (Fe-NPs) 固定在胺/硫醇接枝聚酯膜上，开发了一种柔性多功能纤维膜，用于异质类 Fenton 去除废水中的有机和致病污染物。对所得聚酯膜的全面表征可以验证胺/硫醇（NH ₂或 SH）官能团的成功接枝和 Fe-NPs（50-150 nm）的固定。铁固定化纤维膜（PET-Fe、PET-Si-NH ₂ -Fe、PET-NH ₂ -Fe 和 PET-SH-Fe）在过氧化氢（H ₂ O ₂）存在下的类芬顿功能在去除结晶紫染料（50 mg L ^-1）。系统地研究了pH、铁量和H ₂ O ₂浓度对染料去除的影响。PET-SH-Fe的最高染料去除率在 22 分钟内达到 98.87%，速率常数为 0.1919 min ^-1 ( R ² = 95.36)，通过 COD 分析评估毒性降低了 78%。这些膜可以重复使用多达七个重复循环。通过检查上述结果提出了动力学和假设的脱色机制。此外，所得膜对病原菌（表皮葡萄球菌、大肠杆菌）显示出显着的抗菌活性。) 通过圆盘扩散区抑制和光密度分析研究的菌株。这些发现非常重要，因为它们为非均相类芬顿系统中用于环境和绿色化学应用的基于纺织品的柔性催化剂提供了前景。