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Fabrication of a Porous Polyacrylonitrile Nanofiber Adsorbent for Removing Radioactive co

SSRN, ISSN: 1556-5068
2022
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      140
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Article Description

A Co ion adsorbent was prepared using electrospun porous polyacrylonitrile (PAN) nanofibers, featuring easy recovery for reuse compared with a nanoparticle-based adsorbent. As an efficient ligand for Co ions, ethylenediaminetetraacetic acid (EDTA) was introduced on the surface of porous PAN nanofibers with the aid of a branched polyethyleneimine (PEI) linker to obtain an adsorbent with carboxylic acid groups. On the adsorbent surface, the carboxylic acid from EDTA could adsorb Co ions via ion exchange and amine groups from PEI that remained after EDTA functionalization played a role in coordinating Co ions. The amine and carboxylic acid groups were simultaneously involved in the adsorption on the surface, making it possible to remove Co ions over a wide pH range. An investigation of the adsorption isotherms and kinetics of the nanofibrous adsorbent indicated that monolayer chemisorption was achieved with a maximum Co ion adsorption capacity of 8.32 mg/g. In addition, radioactive Co was efficiently removed by the adsorbent with a removal extent of more than 98%. Considering the easy separation from Co ion solution and regeneration of the nanofibrous adsorbent and its availability in a wide pH range, the adsorbent has great advantages in practical applications.

Bibliographic Details

Geun Tae Pak; Seonyoung Jo; Taek Seung Lee; Hee Man Yang

Elsevier BV

Multidisciplinary; porous polyacrylonitrile nanofibers; Electrospinning; radioactive 60Co adsorbent; ethylenediaminetetraacetic acid; polyethyleneimine

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