Permeation flux of organic molecules through silica-surfactant nanochannels in a porous alumina membrane.
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.
Yamashita
Tomohisa
T
Toyama Institute of Health, Japan. tomohisa@pref.toyama.lg.jp
Kodama
Shuji
S
Ohto
Mikiya
M
Nakayama
Eriko
E
Hasegawa
Sumiyo
S
Takayanagi
Nobutaka
N
Kemmei
Tomoko
T
Yamaguchi
Akira
A
Teramae
Norio
N
Saito
Yukio
Y
D000537:Aluminum Oxide; D001555:Benzene Derivatives / Q000737:chemistry* / Q000302:isolation & purification; D008567:Membranes, Artificial; D010539:Permeability; D016062:Porosity; D012822:Silicon Dioxide; D012997:Solvents
D001555:Benzene Derivatives; D008567:Membranes, Artificial; D012997:Solvents; D012822:Silicon Dioxide; D000537:Aluminum Oxide