Core/shell hybrid fiber with aminated PAN and Fe2O3 as a high capacity adsorbent for phosphate ions

Title
Core/shell hybrid fiber with aminated PAN and Fe2O3 as a high capacity adsorbent for phosphate ions
Authors
최웅수김충현도태구정영균전영상고영건
Keywords
Fibrous adsorbent; Ligand exchange; Phosphorous removal; Simultaneous adsorption; Tensile strength
Issue Date
2019-10
Publisher
Journal of hazardous materials
Citation
VOL 378-120726-10
Abstract
APANF@Fe2O3, a phosphate adsorbent, was synthesized in two steps: the immobilization of an amine group onto polyacrylonitrile fiber (PANF) and the adsorption of an iron ion on aminated PANF (APANF). The amination degree of the PANF was adjusted considering its mechanical properties. The Fe2O3 on the surface of the APANF played a role as a phosphate-grasping layer via a ligand-exchange reaction. The APANF@Fe2O3 showed a considerable PO43− adsorption amount of ca. 6  mmol/g at a low pH region (ca. 2– 7) and 3  mmol/g at a high pH region (ca. 8– 12). The adsorption data were interpreted with various kinetic and isotherm models. The Langmuir model was more suitable than the Freundlich and Redlich-Peterson models to fit the experimental data of the phosphate adsorption on the APANF@Fe2O3 and the pseudo-second-order model was better matched than the pseudo-first-order and Elovich’s models. The results of this study demonstrate that the surface of the fibrous adsorbent was homogenous and the phosphate adsorption behavior of the APANF@Fe2O3 followed a simultaneous chemisorption process into the Fe2O3 layer.
URI
http://pubs.kist.re.kr/handle/201004/70242
ISSN
0304-3894
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KIST Publication > Article
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