对环境中残留抗生素整体治理是亟待解决的问题。纳米铁还原去除水中抗生素是一种有效的处理方法。但纳米铁在液相中严重团聚及钝化失活限制了其工程应用。为解决此应用瓶颈问题，本项目通过构建新型聚丙烯腈膜负载纳米铁有机-无机复合材料，有效提高纳米铁分散性，突破传统疏水性纳米铁负载材料，使亲水化改性不再是纳米铁固定化的必要条件。实现纳米铁复合材料改性方法的开拓，通过环境友好型改性剂多巴胺及其衍生物在聚丙烯腈膜表面自聚和交联，一步法仿生修饰复合材料，提高纳米铁负载量，强化复合材料吸附和还原性能，通过协同作用高效去除抗生素。利用仿生修饰聚丙烯腈膜/纳米铁有机-无机复合材料对纳米铁高效锚定的优势，实现复合材料的回收与再生，防止二次污染。揭示聚丙烯腈膜/纳米铁有机-无机复合材料和污染物界面微观反应过程，为新型聚合物负载纳米铁复合材料的研制及其对水中典型抗生素去除提供理论依据和技术支撑。

In view of the severe aggregation in aqueous phase of nanoscale zero-valent iron (nZVI) and its low degradation efficiency of antibiotic in wastewater, this project aimed to innovatively synthesize polyacrylonitrile immobilized nZVI organic-inorganic composite to effectively increase the dispersity of nZVI. In order to replace the traditionally adopted carrier matrix poly(vinylidene fluoride, which is with high hydrophobicity, hydrophilic polyacrylonitrile (PAN) is employed for preparation of microporous membrane. Therefore, the prepared PAN membrane can be directly used for immobilization without being hydrophilized. The surface of PAN membrane is functionalized by bio-inspired modification with environmentally friendly reagents, dopamine (DA) and its derivatives (e.g.3,4-dihydroxy-l-phenylalanine (DOPA)) due to the advantage of super strong adhesion of DA and DOPA and their easy self-polymerization property to form polydopamine (PDA) and polyDOPA (PDOPA). The adsorption effect of PAN membrane towards target pollutants can be significantly enhanced due to the PAD or PDOPA layer on the surface of PAN membrane. The degradation efficiency of antibiotics can be increased with the synergistic effects of adsorption-reduction by using PAD/PAN@nZVI or PDOPA/PAN@nZVI organic-inorganic composite. As chelant reagents, both PAD and PDOPA play an important role in chelating the precursor of nZVI, ferrous ions, resulting in the successful reuse and recycle of PAD/PAN@nZVI and PDOPA/PAN@nZVI composite. More importantly, the secondary pollution can be avoided. The interactions among the prepared composite, target pollutants and co-existing ions are to be thoroughly investigated to reveal the procedure of the micro-interfacial reactions. The reaction conditions will be optimized. The established methodology of preparation of nZVI-based organic-inorganic composite is expected to provide not only theoretical foundation but also technical support for treatment of antibiotic contaminated wastewater.