title: Determination of methylene blue biosorption by Rhizopus arrhizus in the presence of surfactants with different chemical structures.
abstract: Methylene blue (MB) biosorption properties of Rhizopus arrhizus were investigated in the presence of surfactants. The effects of cationic and anionic surfactants on MB removal by dead biomass (1 g L(-1)) were determined. MB removal was tested as a function of initial pH (2-12), contact time (5-1440 min), and dye (37.4-944.7 mg L(-1)) and surfactant (0-10 mM) concentrations. The opposite charged anionic surfactant dodecylbenzenesulfonic acid sodium salt (DBS) enhanced sorption of cationic MB by biomass dramatically. Maximum biosorption capacity was 471.5 mg g(-1) at pH 8 with 0.5 mM DBS at 944.7 mg L(-1) MB concentration. The surfactant-stimulated fungal decolorization method may provide a highly efficient, inexpensive, and time-saving procedure in biological wastewater treatment technologies.
authors.affiliation: a Department of Biology , Faculty of Science, Ankara University , Ankara , Turkey.
authors.forename: Sevgi Ertuğrul
authors.initials: SE
authors.lastname: Karatay
authors.forename: Ulküye Dudu
authors.initials: UD
authors.lastname: Gül
authors.forename: Gönül
authors.initials: G
authors.lastname: Dönmez
mesh_terms: D000838:Anions / Q000737:chemistry; D001557:Benzenesulfonates / Q000737:chemistry; D002412:Cations / Q000737:chemistry; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D004396:Coloring Agents / Q000493:pharmacokinetics; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D008751:Methylene Blue / Q000493:pharmacokinetics*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D012233:Rhizopus / Q000187:drug effects / Q000378:metabolism*; D013501:Surface-Active Agents / Q000737:chemistry* / Q000494:pharmacology; D014874:Water Pollutants, Chemical / Q000493:pharmacokinetics
chemical_list: D000838:Anions; D001557:Benzenesulfonates; D002412:Cations; D002593:Cetrimonium Compounds; D004396:Coloring Agents; D007220:Industrial Waste; D000644:Quaternary Ammonium Compounds; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; C001114:dodecylbenzenesulfonic acid; C022806:dodecyltrimethylammonium; D008751:Methylene Blue; D000077286:Cetrimonium
keywords: R. arrhizus; anionic surfactant; biosorption; cationic surfactant; methylene blue