title: Permeation flux of organic molecules through silica-surfactant nanochannels in a porous alumina membrane.
abstract: The permeation fluxes of phenol, benzene sulfonate (BS) and benzene disulfonate (BDS) through a porous anodic alumina membrane with the perpendicularly oriented silica-surfactant nanochannel assembly membrane (NAM) were measured in water-ethanol mixture media. The permeation flux depended on solute charges and on solvent composition. As the ethanol ratio increased, the fluxes of BS and BDS increased and the flux of phenol decreased. The results of extraction/elution experiments also depended on the solute charges and the solvent composition. Chromatographic experiments in n-hexane showed that dipole and hydrophobic interactions affect the retention of solutes. Permeation of the solute across the NAM in water-ethanol mixture is likely to be determined by various factors such as dipole interaction, hydrophobic interaction, solvation, and anion-exchange efficiencies.
authors.affiliation: Toyama Institute of Health, Japan. tomohisa@pref.toyama.lg.jp
authors.forename: Tomohisa
authors.initials: T
authors.lastname: Yamashita
authors.forename: Shuji
authors.initials: S
authors.lastname: Kodama
authors.forename: Mikiya
authors.initials: M
authors.lastname: Ohto
authors.forename: Eriko
authors.initials: E
authors.lastname: Nakayama
authors.forename: Sumiyo
authors.initials: S
authors.lastname: Hasegawa
authors.forename: Nobutaka
authors.initials: N
authors.lastname: Takayanagi
authors.forename: Tomoko
authors.initials: T
authors.lastname: Kemmei
authors.forename: Akira
authors.initials: A
authors.lastname: Yamaguchi
authors.forename: Norio
authors.initials: N
authors.lastname: Teramae
authors.forename: Yukio
authors.initials: Y
authors.lastname: Saito
mesh_terms: D000537:Aluminum Oxide; D001555:Benzene Derivatives / Q000737:chemistry* / Q000302:isolation & purification; D008567:Membranes, Artificial; D010539:Permeability; D016062:Porosity; D012822:Silicon Dioxide; D012997:Solvents
chemical_list: D001555:Benzene Derivatives; D008567:Membranes, Artificial; D012997:Solvents; D012822:Silicon Dioxide; D000537:Aluminum Oxide