ZHU Zhenya, BAI Chengling, WANG Lei, MENG Xiaorong. Study on removal characteristics of organic dyes by tight GO/PVDF composite membranes[J]. CIESC Journal, 2019, 70(6): 2361-2369
ZHU Zhenya, BAI Chengling, WANG Lei, MENG Xiaorong. Study on removal characteristics of organic dyes by tight GO/PVDF composite membranes[J]. CIESC Journal, 2019, 70(6): 2361-2369DOI: 10.11949/0438-1157.20181479.
Study on removal characteristics of organic dyes by tight GO/PVDF composite membranes
The PVDF membrane was modified by graphene oxide (GO)
and the compacted GO/PVDF composite membrane was prepared by immersion precipitation phase transformation. The hydrophilicity
pure water flux and surface zeta potential of the membrane were investigated. Rhodamine B and methyl orange were selected as positive and negative charge dyes to investigate the adsorption
desorption and retention properties of membranes. The results showed that the pure water flux of membrane increased from 45.10 L/(m
2
·h) to 58.40 L/(m
2
·h). When the content of GO was 0.50%(mass) (M2)
the comprehensive performance of membrane was better. GO/PVDF composite membranes had a good adsorption effect on Rhodamine B. After 1.5 d
the adsorption capacity of M0—M3 were 1.02
1.24
1.79 and 1.49 mg/g respectively. The decolorization rate of Rhodamine B by ethanol was over 80%. The adsorption capacity of M2 was only 0.46 mg/g
and decolorization rate of methyl orange by 0.10 mol/L HCl solution was over 86%. The retention rates of two dyes remained above 57.60% and 57.20%. This study provided a scientific basis for the preparation of nano-materials modified membranes and their characteristics of organic dye removal.
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