title: Removal and recovery of acridine orange from solutions by use of magnetic nanoparticles.
abstract: Here we report a separation of a cationic dye, acridine orange (AO), by use of magnetic nanoparticles (gamma-Fe(2)O(3)). The particles were showed to capture 98% of the dye within the first 20 min of contact time. The maximum sorption capacity of the magnetic nanoparticles (MNPs) for AO was 59mg/g. The sorption isotherms fit well with the Freundlich model. The sorption kinetics fits well the pseudo-second-order rate equation model. 60-90% dye recovery was achieved by rotary evaporating the dye bearing nanoparticles in acetone. The nanoparticles were recycled for additional dye removal.
authors.affiliation: Center of Research Excellence in Nanobiosciences, University of North Carolina at Greensboro, Greensboro, NC 27402, United States.
authors.forename: Shahnaz
authors.initials: S
authors.lastname: Qadri
authors.forename: Ashley
authors.initials: A
authors.lastname: Ganoe
authors.forename: Yousef
authors.initials: Y
authors.lastname: Haik
mesh_terms: D000165:Acridine Orange / Q000302:isolation & purification*; D000327:Adsorption; D003247:Conservation of Natural Resources / Q000379:methods; D005290:Ferric Compounds; D007700:Kinetics; D008280:Magnetics; D053758:Nanoparticles; D012996:Solutions
chemical_list: D005290:Ferric Compounds; D012996:Solutions; C000499:ferric oxide; D000165:Acridine Orange