Developing novel and efficient adsorption materials to solve water pollution is a very challenging task for the sake of environmental protection and human health. Herein, an ultra-light and porous 3D nanofiber aerogels (NFA) has been prepared by freezing casting technology and cross-linking with epichlorohydrin(ECH) via short polyacrylonitrile (PAN)/polyetherimide (PEI) nanofibers, which features high mechanical stability and good mass transfer performance. Moreover, experiments show that the adsorption capacities of 3D nanofiber aerogels (NFA) for Cu(II), Cr(VI), As(V) and anionic dye methyl orange (MO) reach 242.71 mg/g, 214.14 mg/g, 258.36 mg/g and 183.06 mg/g, respectively. Importantly, the adsorbent still maintains considerable adsorption efficiency after seven adsorption-regeneration cycles.

为了环境保护和人类健康，开发新颖有效的吸附材料以解决水污染是一项非常艰巨的任务。本文采用冷冻浇铸技术，通过短聚丙烯腈（PAN）/聚醚酰亚胺（PEI）纳米纤维与环氧氯丙烷（ECH）交联，制备了超轻质多孔3D纳米纤维气凝胶。传质性能。此外，实验表明3D纳米纤维气凝胶（NFA）对Cu（II），Cr（VI），As（V）和阴离子染料甲基橙（MO）的吸附容量分别达到242.71 mg / g，214.14 mg / g，258.36毫克/克和183.06毫克/克。重要的是，在七个吸附-再生循环后，吸附剂仍保持相当高的吸附效率。