Research on the modification of PAN hollow fiber membrane with high heavy metal ions adsorption

Abstract

PAN hollow fiber functional membrane with heavy metal ion adsorption capacity was prepared via layer-by-layer method using diazo-resin (DR). Ethylenediaminetetraacetic acid (EDTA) and graphene oxide (GO) with chelating function were used as modifier. Modification effect was studied by Fourier Transform Infrared Spectrometer (FTIR), contact angle test, scanning electron microscopy (SEM) and the copper ion adsorption capacity measurement. The result showed that EDTA and GO were successfully grafted on the surface of modified membrane and the hydrophilicity of the modified membrane increased. Roughness of membrane surface increased when the functional groups introduced on the surface. Adsorption for Cu²⁺ of modified membrane significantly improved.

Keywords:

• Hollow fiber
• layer-by-layer self-assembly
• adsorption

Additional information

Funding

This study was funded by the National Natural Science Foundation of China (21675091, 21574072, 21874078), the Taishan Young Scholar Program of Shandong Province (tsqn20161027), the Major Science and Technology Innovation Project of Shandong Province (2018CXGC1407), the Key Research and Development Project of Shandong Province (2016GGX102028, 2016GGX102039, 2017GGX20111), the Project of Shandong Province Higher Educational Science and Technology Program (J15LC20), the People's Livelihood Science and Technology Project of Qingdao (166257nsh, 173378nsh), the Innovation Leader Project of Qingdao (168325zhc), and the First Class Discipline Project of Shandong Province.