Quantitative removal of uranyl ions from aqueous solutions using micellar-enhanced ultrafiltration

✍ Scribed by Edmondo Pramauro; Alessandra Bianco Prevot; Ezio Pelizzetti; Rosangela Marchelli; Arnaldo Dossena; Alberto Biancardi

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 761 KB
• Volume: 264
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(92)87019-h

✦ Synopsis

Quantltatlve removal of uranyl Ions present m aqueous solutions at the pg ml-' concentration level was achieved usmg the mlcellar-enhanced ultrafiltration techmque Suitable chelatmg mlcelles were formed by dlssolvmg selectwe hydrophobic acychc hgands m the usual amphlphlhc aggregates These hgand-doped nacelles accumulate the uranyl Ions through the formatlon of tightly bound chelates The aggregates and their guest metal complexes were successwely separated by ultrafiltration through hydrophdtc membranes of suitable pore size The efficiency of the process IS related to the affinity of the hgands for the micelles Non-iomc and cationic surfactants were investigated Quantltatwe retention of the analyte m the surfactant-nch retentate solution was achieved when workmg with cetyltrnnethylammonmm brormde rmcelles The uranyl recovery was significantly increased by mtroducmg tnoctylphosphme oxide as an amuhary hgand, whrch allowed for very effklent preconcentratlons at lower pH