Synthesis of functionalized PET fibers by grafting and modification and their application for Cr(VI) ion removal

Synthesis of functionalized PET fibers by grafting and modification and their application for Cr(VI) ion removal

A new fiber adsorbent for removing Cr(VI) ions from aqueous solution was prepared by grafting and modification. The grafted fiber and modified fiber were characterized by SEM, FTIR, and TGA. FTIR analysis indicated that acrylonitrile monomer was grafted onto the PET surface and that new groups were...

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Bibliographic Details
Published in:Journal of polymer research Vol. 25; no. 1; pp. 1 - 12
Main Authors: Coşkun, Ramazan, Birgül, Hanım, Delibaş, Ali
Format: Journal Article
Language:English
Published: Dordrecht Springer Netherlands 2018
Springer Nature B.V
Subjects:
Adsorption
Aqueous solutions
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Electron microscopy
Endothermic reactions
Grafting
Industrial Chemistry/Chemical Engineering
Ion concentration
Isotherms
Original Paper
Parameter modification
Polymer Sciences
Positron emission
Surface chemistry
Thermodynamic properties
Tomography
Removal
Modification
Cr(VI) ions
PET fiber
Grafting
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Summary:A new fiber adsorbent for removing Cr(VI) ions from aqueous solution was prepared by grafting and modification. The grafted fiber and modified fiber were characterized by SEM, FTIR, and TGA. FTIR analysis indicated that acrylonitrile monomer was grafted onto the PET surface and that new groups were present on the surface after the modification. Scanning electron microscopy showed that the PET fiber was wider after grafting and especially modification. The TGA results showed that the degradation steps and the thermal behavior of the PET fiber changed after modification. The effects of the pH, ion concentration, and temperature on the amount of Cr(VI) adsorbed were investigated. The fiber showed its maximum adsorption capacity in acidic medium. Isotherm studies indicated that the experimental results were best fitted to the Langmuir isotherm. The adsorption capacity of the modified fiber was found to be 25.77, 38.17, and 44.84 mg/g fiber at 25, 35, and 45 °C, respectively. Kinetic results indicated that the adsorption of Cr(VI) onto the modified fiber followed a pseudo-second-order kinetic model. Calculated thermodynamic parameters demonstrated that the adsorption of Cr(VI) ions on the modified fiber is an endothermic, feasible, and spontaneous process.
ISSN:1022-9760
1572-8935
DOI:10.1007/s10965-017-1429-7