A novel poly (vinylidene fluoride) (PVDF)/graphene oxide (GO) membrane with an amount of silver carbonate (Ag2CO3) deposition was prepared by both the phase-inversion method and the in situ co-precipitation reaction

respectively. The casting solution of Ag2CO3@ PVDF/GO membrane (AgC-PGM) is composed of PVDF as the polymer matrix

GO and Ag2CO3 powders as additives

PVP -K30 as the pore-forming agent

and dimethylacetamide (DMAc) as the solvent. The morphology and performances of the AgC-PGM were investigated using scanning electron microscope (SEM)

Fourier transform infrared spectroscopy (FTIR)

contact angle

the BSA rejection and cross flow filtration. Moreover

the separation effect of the lake water was also observed by three-dimensional excitation fluorescence spectrum matrix (3D-EEM). The results indicated that the AgC-PGM exhibited good hydrophilicity and filtering quality

and the pure water flux increased from 132.8 to 237.4 L·m-2·h-1

meanwhile the rejection for the BSA solution stabilized around 75% as the GO loading amount to 0.4% (mass)

AgNO3 (5.0 mmol·L-1)/Na2CO3 (2.5 mmol·L-1) precipitating 3 times. In addition

compared to the PVDF membrane

the 3D-EEM of the lake water shows a better removal effect on the protein pollutant

the removal efficiency of both CODMn and UV254 separately achieved about 95% and 83% when the AgC-PGM was used to filter the surface water continuously

which has reached to the national primary standard.