Fabrication of PET/PAN/GO/Fe3O4 nanofibrous membrane for the removal of Pb(II) and Cr(VI) ions

The performance of PET/PAN/GO/Fe3O4 nanofibrous membrane was investigated for Pb(II) and Cr(VI) ions removing in both bath and membrane systems. The structure and morphology of PET/PAN/GO/Fe3O4 nanofibrous membrane were determined using XRD, FTIR and SEM analysis. The influences of pH, metal ions concentration and operation time on the transport properties of PET/PAN/GO/Fe3O4 nanofibrous membranes were studied in the membrane process. The separation capability of the PET/PAN/GO/Fe3O4 nanofibrous membrane containing GO/Fe3O4 5 wt.% was maximum for both Pb(II) and Cr(VI). ions removing. The kinetic, isotherm and thermodynamic parameters for Pb(II) and Cr(VI) ions sorption using PAN/GO/Fe3O4 5 wt.% nanofibers were also investigated. The sorption data of metal ions onto the PAN/GO/Fe3O4 5 wt.% nanofibers were best described by pseudo-second-order and Redlich-Peterson models. The endothermic and spontaneous nature of Pb(II) and Cr(VI) ions sorption using PAN/GO/Fe3O4 5 wt.% nanofibers was obtained by investigation of thermodynamic parameters. The reusability of PAN/GO/Fe3O4 nanofibers were carried out for five sorption-desorption cycles. (C) 2016 Elsevier B.V. All rights reserved.