Effect of Graphene Oxide (GO) on Water Flux of Polyvinylidene Difluoride (PVDF) Membrane in Oily Wastewater

摘要

PVDF/GO membranes were successfully casted using phase inversion method. X-Ray analysis (XRD) showed that GO was well dispersed into the PVDF membrane matrix without any agglomeration. Crystallinity of PVDF/GO membrane was lower than pristine PVDF membrane. Field Emission Scanning Electron Microscopy (FESEM) images showed that surface porosity of PVDF/GO membrane was lesser than pristine PVDF membrane. Performance of PVDF/GO membrane was tested in oily waste water at pH ranging from 4 to 10 and 2 bar operating pressure. Highest water fluxes of 290 L/m~2 hr was achieved for membrane at pH 10 at 30 minutes and then decline to 165 L/m~2hr at 90 minutes. Then, the used PVDF/GO membranes were cleaned chemically. The flux recovery ratio at pH ranging from 4 to 10 were almost the same which was 80% at all pH value.