Preparation of wood-based cellulose/graphene separation membrane and pollutant separation performance
The cellulose film was produced by using acidic sodium chlorite and sodium hydroxide solution to remove lignin and hemicellulose from balsa wood.The performance studies on microstructure,element distribution and composition,and wettability of this film were carried out,and the results showed that the adsorption capacity of the cellulose adsorbent after chemical stripping could reach 120.0mg/g for the dye methylene blue,which was in good agreement with both Langmuir and Temkin models.With the shrinkage of membrane pore size and the loading of graphene oxide(GO),the retention performance of the cellulose membrane for antibiotics was greatly enhanced.The pure water flux of the cellulose/GO membrane was increased to 13.5 times of the original flux[from 56.5L/(m2·h)to 764.1L/(m2·h)]at 0.3MPa flux pressure.The retention rate of ciprofloxacin by the cellulose/GO membrane was up to 65.6%(50.9%for ciprofloxacin by cellulose membrane).The related research work provided a new idea for the preparation and application of polysaccharide membranes.
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维普
