Preparation of nanofiber aerogels by electrospinning and studying of its adsorption properties for heavy-metal and dyes
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Preparation of nanofiber aerogels by electrospinning and studying of its adsorption properties for heavy‑metal and dyes Longqi Xue1 · Jing Ren1,2 · Shugang Wang1 · Dehui Qu1,2 · Zhonglin Wei1 · Qingbiao Yang1,3,4 · Yaoxian Li1
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract 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. Keywords Electrospinning · Adsorption · Nanofiber aerogels (NFA) · Regeneration
1 Introduction With the development of industry, heavy metal ions and dyes from chemical, metallurgical and dyeing industries have become major causes of water pollution [1]. Among the heavy metal ions and dyes, one of the most widely distributed heavy metals is copper. Copper and its alloys are widely used in the metallurgical industry and electrical Longqi Xue and Jing Ren contributed equally to this article. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10934-020-00937-6) contains supplementary material, which is available to authorized users. * Qingbiao Yang [email protected] 1
College of Chemistry, Jilin University, Changchun 130021, People’s Republic of China
2
College of Materials Science and Engineering, Jilin University of Chemical Technology, Jilin 132022, People’s Republic of China
3
Jilin Provincial Key Laboratory of Lymphatic Surgery, China-Japan Union Hospital of Jilin University, Changchun 130031, People’s Republic of China
4
College of Chemistry, Jilin University, Changchun 130061, People’s Republic of China
industry. Excessive copper exposure or consumption may cause brain, liver, respiratory and nervous system diseases, especially in children. Therefore, copper has been listed as a priority pollutant by the US Environmental Protection Agency, and the presence and removal of residual copper ions in water must be checked [2]. Chromium is widely used in metal processing, electroplating and leather industries. A large amount of Cr (VI) ions may penetrate into the surface soil through industrial discharge, causing pollution of groundwater, rivers and lakes, accumulating in the human body through the food chain and inducing cancer. Therefore, the government lists hexavalent chromium as a priority pollutant, and the removal of hexavalent chromiu
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