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水合氧化铁@聚偏氟乙烯复合吸附膜去除水中磷酸盐的特性研究

作者：许千卉，夏隆博，邹栋，聂广泽

单位：南京工业大学环境科学与工程学院，南京 211816

关键词：磷酸盐；水合氧化铁；复合膜；吸附；分离

DOI号： 10.16159/j.cnki.issn1007-8924.2025.03.006

分类号： TQ028

出版年,卷(期):页码： 2025,45(3):54-65

摘要：

为了深度去除复杂水体中的磷酸盐，本研究通过简单共混法，将水合氧化铁(HFO)纳米颗粒负载到聚偏氟乙烯(PVDF)膜中制备了一种复合吸附膜（HFO@PVDF）。该复合膜结合了PVDF基质膜优异的化学稳定性、高通量以及多孔结构特性，同时借助HFO对磷酸盐的特殊亲和力，展现出优异的除磷性能。系统考察了pH值、反应时间、初始浓度、共存阴离子以及大分子有机物对HFO@PVDF膜去除磷酸盐效率的影响。实验结果表明，该复合膜具有高效的除磷效率和良好的选择性。静态吸附与动态过滤循环实验进一步证实了HFO@PVDF膜出色的再生能力。此外，通过模拟真实水质条件，验证了该材料在实际应用中的潜力。在pH值为6.5的条件下，HFO@PVDF膜对含磷量为2 mg/L的模拟废水处理量可达130 L/m2。值得注意的是，该复合膜在高效去除磷酸盐的同时，还能协同去除重金属Pb2+，对于悬浮颗粒物截留率也超过99%。因此，HFO@PVDF吸附膜在含磷废水深度净化领域具有广阔的应用前景，也为纳米HFO吸附剂在实际水环境中的应用提供了新的思路和参考。

In this work, a composite adsorption membrane (HFO@PVDF) was fabricated to address phosphate removal in complex aqueous systems by embedding hydrous ferric oxide (HFO) nanoparticles into the pores of a polyvinylidene fluoride (PVDF) membrane using a simple blending method. This composite membrane integrates the outstanding chemical stability, high permeability, and porous structure of PVDF membrane with the unique phosphate affinity of HFO, resulting in superior phosphate removal capabilities. The study systematically investigated the effects of pH, reaction time, initial concentration, coexisting anions, and macromolecular organics on the phosphate removal efficiency of the HFO@PVDF membrane. Results demonstrated that the membrane exhibited high phosphate removal efficiency and selectivity. Static and dynamic cycle experiments confirmed its excellent regeneration capacity. Practical applicability was further validated through real-water simulations. At a pH of 6.5, the HFO@PVDF membrane achieved a treatment capacity of 130 L/m2 for synthetic water containing 2 mg/L of phosphate. Importantly, the membrane not only efficiently removed phosphates but also enabled simultaneous removal of heavy metals like Pb2+, while effectively retaining suspended solids on the membrane surface. These findings highlight the HFO@PVDF membrane's strong potential for advanced purification of phosphate-containing wastewater, offering a new approach for utilizing HFO nanoadsorbents in practical aquatic environments.

基金项目：

国家自然科学基金面上项目（22476091）

作者简介：

许千卉（2000-），女，江苏海安人，硕士研究生，研究方向为环境功能材料

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