A HNO3-Responsive Aqueous Biphasic System for Metal Separation: Application towards Ce-IV Recovery

• Type: Article in International Scientific Journal
• Date: 2021

Authors

Schaeffer, N (Author) Other; Vargas, SJR (Author) Other; Passos, H (Author) Other; Brandao, P (Author) Other; Nogueira, HIS (Author) Other; Svecova, L (Author) Other; Papaiconomou (Author) Other; Coutinho, JAP (Author) Other

Journal

Title: ChemSusChem

Vol. 14

Pages: 3018-3026

ISSN: 1864-5631

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00V-3E4

DOI: 10.1002/cssc.202101149

Abstract (EN): An acidic aqueous biphasic system (AcABS) presenting a desired and reversible phase transition with HNO3 concentration and temperature was developed herein as an integrated platform for metal separation. The simple, economical, and fully incinerable (C,H,O,N) AcABS composed of tetrabutylammonium nitrate ([N-4444][NO3])+HNO3+H2O was characterized and presented an excellent selectivity towards Ce-IV against other rare earth elements and transition metals from both synthetic solutions and nickel metal hydride (NiMH) battery leachates. The acid-driven self-assembly of AcABS bridges the gap between traditional ABS and liquid-liquid extraction whilst retaining their advantageous qualities, including compatibility with highly acidic solutions, water as the primary system component, the avoidance of organic diluents, rapid mass transfer, and the potential integration of the leaching and separation steps.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10