Metal ion separations in polyethylene glycol-based aqueous biphasic systems

Journal Article · Thu Apr 01 04:00:00 EST 1993 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399308018023· OSTI ID:6421216

Rogers, R D; Bond, A H; Bauer, C B ^[1]

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1. Northern Illinois Univ., Dekalb (United States)

Aqueous biphasic systems of two dissimilar polymers, or of a water-soluble polymer and an inorganic salt, can be used to selectively partition metal ions. While these systems are well known for separating biomaterials, only a handful of papers have appeared investigating their utility for separating metal ions. The few results that have appeared in the literature have utilized salt solutions of polyethylene glycol (PEG) and fall into two categories: (1) partitioning of the metal ion to the PEG-rich phase by the addition of a water-soluble extractant which coordinates the metal ion and (2) addition of an inorganic anion which produces a metal complex that partitions to the PEG-rich phase. In addition the authors have recently added a third category: (3) partitioning of a metal ion directly from the salt-rich to the PEG-rich phase without an added component. It appears that a separations strategy can be developed for metal ions from all areas of the periodic table under a wide variety of conditions. This review covers papers published concerning metal ion separations in aqueous biphasic systems and unpublished work of the authors. The incredible potential of this area for the future research is discussed. 70 refs., 2 figs., 1 tab.

• OSTI ID: 6421216
• Journal Information: Separation Science and Technology; (United States), Journal Name: Separation Science and Technology; (United States) Vol. 28:5; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

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ALCOHOLS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AMMONIUM COMPOUNDS
AMMONIUM SULFATES
CARBON COMPOUNDS
CARBONATES
CHARGED PARTICLES
COMPLEXES
DATA
DISPERSIONS
DYES
EXPERIMENTAL DATA
EXTRACTION
GLYCOLS
HYDROXY COMPOUNDS
INFORMATION
IONS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PH VALUE
POLYETHYLENE GLYCOLS
POLYMERS
POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
RARE EARTH COMPOUNDS
SEPARATION PROCESSES
SODIUM COMPOUNDS
SODIUM SULFATES
SOLUTIONS
SOLVENT EXTRACTION
SULFATES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS