Removal of Ionic Dyes by Nanofiber Membrane Functionalized with Chitosan and Egg White Proteins: Membrane Preparation and Adsorption Efficiency

Yue Sheng Chen, Chien Wei Ooi, Pau Loke Show, Boon Chin Hoe, Wai Siong Chai, Chen Yaw Chiu, Steven S.S. Wang, Yu Kaung Chang

Research output: Journal PublicationArticlepeer-review

36 Citations (Scopus)

Abstract

Electrospun polyacrylonitrile (PAN) nanofiber membrane was functionalized with chi-tosan and proteins for use in the treatment of dye-containing wastewater. The PAN nanofiber membrane was subjected to alkaline hydrolysis, before being grafted with chitosan and subsequently the proteins from chicken egg white. The resultant nanofiber membrane (P-COOH-CS-CEW) was com-prehensively characterized using thermogravimetric analysis, Fourier-transform infrared spectros-copy, and scanning electron microscopy. The efficiency of P-COOH-CS-CEW in removing cationic dye toluidine blue O (TBO) and anionic dye acid orange 7 (AO7) in aqueous solution was evaluated. Based on the performance of model fitting, Langmuir and pseudo-second-order kinetic model could be used to describe the performance of P-COOH-CS-CEW in the removal of TBO (pH 10) and AO7 (pH 2) from the dye solutions. The adsorbed TBO and AO7 dyes can be completely desorbed by an elution solution made of 50% (v/v) ethanol and 1 M sodium chloride. After five consecutive adsorp-tion-desorption cycles, the efficiency of dye removal by P-COOH-CS-CEW was maintained above 97%.

Original languageEnglish
Article number63
JournalMembranes
Volume12
Issue number1
DOIs
Publication statusPublished - Jan 2022
Externally publishedYes

Keywords

  • Cationic and anionic dyes
  • Chitosan
  • Egg white proteins
  • Protein modified nanofiber membrane
  • Removal

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Process Chemistry and Technology
  • Filtration and Separation

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