title: Dehydration of dioxane by pervaporation using filled blend membranes of polyvinyl alcohol and sodium alginate.
abstract: Pervaporation membranes were made by solution blending of polyvinyl alcohol (PVA) and sodium alginate (SA). Accordingly, five different blends with PVA:SA weight ratio of 75:25, 50:50, 25:75, 20:80 and 10:90 designated as PS1, PS2, PS3, PS4 and PS5, respectively, were prepared. Each of these blends was crosslinked with 2, 4 and 6 wt% glutaraldehyde and the resulting fifteen (5 × 3) membranes were used for pervaporative separation of 90 wt% dioxane in water. The membranes made from PS4 and PS5 were not stable during pervaporation experiments. Among the stable membranes PS3 membrane crosslinked with 2 wt% glutaraldehyde showed the best results for flux and selectivity. Thus, it was filled with nano size sodium montmorillonite filler and used for separation of dioxane-water mixtures over the entire concentration range of 80-99.5 wt% dioxane in water. The membranes were also characterized by mechanical properties, FTIR, SEM, DTA-TGA and XRD.
authors.affiliation: Department of Chemical Engineering, Haldia Institute of Technology, Haldia, West Bengal, India.
authors.forename: Sunil Baran
authors.initials: SB
authors.lastname: Kuila
authors.forename: Samit Kumar
authors.initials: SK
authors.lastname: Ray
mesh_terms: D000464:Alginates / Q000737:chemistry*; D004058:Diffusion; D004146:Dioxanes / Q000737:chemistry*; D020723:Glucuronic Acid / Q000737:chemistry; D005976:Glutaral / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D055595:Mechanical Phenomena; D008567:Membranes, Artificial; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D013696:Temperature; D013816:Thermodynamics; D014835:Volatilization; D014867:Water / Q000737:chemistry*
chemical_list: D000464:Alginates; D004146:Dioxanes; D006603:Hexuronic Acids; D008567:Membranes, Artificial; D014867:Water; D020723:Glucuronic Acid; D011142:Polyvinyl Alcohol; C025223:1,4-dioxane; D005976:Glutaral
keywords: Blend; Membrane characterization; Pervaporation; Polyvinyl alcohol; Sodium alginate