The purification of hazardous textile dyeing wastewater has exhibited many challenges because it consists of a complex mixture, including dyestuff, additives, and salts. It is necessary to fabricate membranes with enhanced permeability, fouling resistance, stability, and superior dyes and salts removal from wastewater. Incorporating a highly water stable metal-organic framework (MOFs) into membranes would meet the requirements for the efficient purification of textile wastewater. In this study, nanofiltration (NF) membranes are fabricated by incorporating MIL-100 (Fe) into the chitosan (CS) through film casting technique. The effect of MIL-100 (Fe) loadings on chitosan characterized by FT-IR, XRD, contact angle measurement, FESEM-EDS, XPS, zeta potential, and surface roughness analysis. The membrane characterization confirmed the enhanced surface roughness, pore size, surface charge, and hydrophilicity. The CS/MIL-100 (Fe) membrane exhibited an improved pure water flux from 5 to 52 L/m²h as well as 99% rejection efficiency for cationic methylene blue (MB) and anionic methyl orange (MO). We obtained the rejection efficiency trend for the MB mixed salts in the order of MgSO₄ (Mg²⁺ - 51.6%, SO₄²⁻ - 52.5%) > Na₂SO₄ (Na⁺ - 26.3%, SO₄²⁻ - 29.3%) > CaCl₂ (Ca²⁺ - 21.4%, Cl⁻ - 23.8%) > NaCl (Na⁺ - 16.8%, Cl⁻ - 19.2%). In addition, the CS/MIL-100 (Fe) composite membrane showed excellent rejection efficiency and antifouling performances with high recycling stability. These stunning results evidenced that the CS/MIL-100 (Fe) nanofiltration membrane is a promising candidate for removing toxic pollutants in the textile dyeing wastewater.

有害纺织印染废水的净化面临许多挑战，因为它由复杂的混合物组成，包括染料、添加剂和盐类。有必要制造具有增强的渗透性、抗污染性、稳定性以及从废水中去除染料和盐分的膜。将高度水稳定的金属有机骨架 (MOF) 结合到膜中可以满足高效净化纺织废水的要求。在这项研究中，纳滤 (NF) 膜是通过薄膜流延技术将 MIL-100 (Fe) 掺入壳聚糖 (CS) 中制成的。MIL-100 (Fe) 负载对壳聚糖的影响通过 FT-IR、XRD、接触角测量、FESEM-EDS、XPS、zeta 电位和表面粗糙度分析表征。膜表征证实了增强的表面粗糙度、孔径、表面电荷和亲水性。CS/MIL-100 (Fe) 膜的纯水通量从 5 L/m 提高到 52 L/m²小时以及阳离子亚甲蓝 (MB) 和阴离子甲基橙 (MO) 的 99% 截留效率。我们得到了MB混合盐的截留效率趋势，顺序为MgSO ₄ (Mg ²⁺ - 51.6%, SO ₄ ²⁻ - 52.5%) > Na ₂ SO ₄ (Na ⁺ - 26.3%, SO ₄ ²⁻ - 29.3%) > CaCl ₂ (Ca ²⁺ - 21.4%, Cl ^- - 23.8%) > NaCl (Na ⁺ - 16.8%, Cl ^-- 19.2%）。此外，CS/MIL-100（Fe）复合膜表现出优异的截留效率和防污性能，并具有较高的循环稳定性。这些惊人的结果证明，CS/MIL-100 (Fe) 纳滤膜是去除纺织印染废水中有毒污染物的有前途的候选者。