A HNO3-Responsive Aqueous Biphasic System for Metal Separation: Application towards Ce-IV Recovery
authors Schaeffer, N; Vargas, SJR; Passos, H; Brandao, P; Nogueira, HIS; Svecova, L; Papaiconomou; Coutinho, JAP
nationality International
journal CHEMSUSCHEM
author keywords electronic waste; hydrometallurgy; metal separation; self-assembly; sustainable chemistry
keywords RARE-EARTH-ELEMENTS; IONIC-LIQUID; TETRAVALENT CERIUM; CRYSTAL-STRUCTURE; MULTINUCLEAR SPECIATION; REDOX CHEMISTRY; FORCE-FIELD; NITRIC-ACID; EXTRACTION; NITRATE
abstract 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.
publisher WILEY-V C H VERLAG GMBH
issn 1864-5631
isbn 1864-564X
year published 2021
volume 14
issue 14
beginning page 3018
ending page 3026
digital object identifier (doi) 10.1002/cssc.202101149
web of science category 9
subject category Chemistry, Multidisciplinary; Green & Sustainable Science & Technology
unique article identifier WOS:000663210100001
  ciceco authors
  impact metrics
journal analysis (jcr 2019):
journal impact factor 7.962
5 year journal impact factor 7.928
category normalized journal impact factor percentile 90.878
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg