Adsorption mechanism for xanthene dyes to cellulose granules.
The xanthene dyes, erythrosine, phloxine, and rose bengal, were adsorbed to charred cellulose granules. The charred cellulose granules were preliminarily steeped in ionic (NaOH, NaCl, KOH, KCl, and sodium dodecyl sulfate (SDS)), nonionic (glucose, sucrose, and ethanol), and amphipathic sucrose fatty acid ester (SFAE) solutions, and adsorption tests on the dye to the steeped and charred cellulose granules were conducted. Almost none of the dye was adsorbed when the solutions of ionic and amphipathic molecules were used, but were adsorbed in the case of steeping in the nonionic molecule solutions. Thin-layer chromatography (TLC) and the Fourier transform infra-red (FT-IR) profiles of SFAE which was adsorbed to the charred cellulose granules and extracted by ethyl ether suggested the presence of hydrophobic sites on the surface of the charred cellulose granules. We confirmed that the xanthene dyes could bind to the charred cellulose granules by ionic and hydrophobic bonds.
Faculty of Home Economics, Laboratory of Food Technology, Kobe Women's University, Japan.
Aya
A
Tabara
Chihiro
C
Yamane
Masaharu
M
Seguchi
D000327:Adsorption; D002482:Cellulose / Q000737:chemistry*; D002855:Chromatography, Thin Layer; D004923:Erythrosine / Q000737:chemistry*; D000431:Ethanol / Q000737:chemistry; D004986:Ether / Q000737:chemistry; D005452:Fluoresceins / Q000737:chemistry*; D005505:Food Coloring Agents / Q000737:chemistry*; D005947:Glucose / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D006878:Hydroxides / Q000737:chemistry; D011189:Potassium Chloride / Q000737:chemistry; D017680:Potassium Compounds / Q000737:chemistry; D012395:Rose Bengal / Q000737:chemistry*; D012965:Sodium Chloride / Q000737:chemistry; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D012972:Sodium Hydroxide / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013395:Sucrose / Q000031:analogs & derivatives / Q000737:chemistry
D005452:Fluoresceins; D005505:Food Coloring Agents; D006878:Hydroxides; D017680:Potassium Compounds; D004986:Ether; D012395:Rose Bengal; D012967:Sodium Dodecyl Sulfate; D000431:Ethanol; D012965:Sodium Chloride; D012972:Sodium Hydroxide; D013395:Sucrose; D011189:Potassium Chloride; D002482:Cellulose; D005947:Glucose; D004923:Erythrosine; C085059:phloxine; C029943:potassium hydroxide