Surface modified composite nanofibers for the removal of indigo carmine dye from polluted water

M G Yazdi; M Ivanic; Alaa Mohamed; A Uheida

doi:10.1039/c8ra02463d

Surface modified composite nanofibers for the removal of indigo carmine dye from polluted water

RSC Adv. 2018 Jul 10;8(43):24588-24598. doi: 10.1039/c8ra02463d. eCollection 2018 Jul 2.

Authors

M G Yazdi¹, M Ivanic², Alaa Mohamed^{3

4

5}, A Uheida¹

Affiliations

¹ Department of Applied Physics, KTH Royal Institute of Technology Stockholm Sweden alakha@kth.se salam@kth.se +201069676710 +46-8-7909132.
² Division for Marine and Environmental Research, Ruder Boskovic Institute Zagreb Croatia.
³ Egypt Nanotechnology Centre, EGNC, Cairo University 6th October City 12588 Egypt.
⁴ Membrane Technology Department, Institute of Functional Interfaces (IFG), Karlsruhe Institute of Technology (KIT) 76344 Germany.
⁵ Production Engineering and Printing Technology Department, Akhbar El Yom Academy 12655 Giza Egypt.

Abstract

Surface coated magnetite nanoparticles (Fe₃O₄ NPs) with 3-mercaptopropionic acid were immobilized on amidoximated polyacrilonitrile (APAN) nanofibers using electrospinning followed by crosslinking. The prepared composite nanofibers were characterized with Scanning Electron Microscopy (SEM), and Fourier Transform Infrared analysis (FTIR). The composite nanofiber was evaluated for the removal of indigo carmine dye from aqueous solutions. The effects of contact time, initial dye concentration, solution pH and adsorption equilibrium isotherms were studied. The adsorption of indigo carmine was found to be greatly affected by solution pH. The maximum loading capacity was determined to be 154.5 mg g^-1 at pH = 5. The experimental kinetic data were fitted well using a pseudo-first order model. The adsorption isotherm studies showed that the adsorption of indigo carmine fits well with the Langmuir model. The reuse of the composite nanofiber was also investigated in which more than 90% of indigo carmine was recovered in 5 min. The results of stability studies showed that the adsorption efficiency can remain almost constant (90%) after five consecutive adsorption/desorption cycles.