Separation of bivalent cadmium, mercury, and zinc in a neutral macrocycle-mediated emulsion liquid membrane system

Journal Article · Thu Oct 01 04:00:00 EDT 1987 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00146a018· OSTI ID:6091774

Izatt, R M; Bruening, R L; Wu, G; Cho, M H; Christensen, J J

The preferential transport of neutral cation-anion moieties in neutral macrocycle-facilitated emulsion liquid membranes is described. The separations of CdA/sub 2/ from Zn/sup 2 +/ and HgA/sub 4//sup 2 -/ where A/sup -/ = SCN/sup -/, I/sup -/, Br/sup -/, or Cl/sup -/; or Hg(SCN)/sub 2/ from Cd/sup 2 +/ and Zn/sup 2 +/; and of Cd(SCN)/sub 2/ from several cation-containing moieties are used to illustrate the principle. Equilibrium constants for cation-source phase coanion, cation-macrocycle, and cation-receiving phase reagent interaction as well as the free energy of hydration of the transporting moiety are examined as parameters for the prediction of cation transport selectivities. An emulsion liquid membrane consisting of an aqueous source phase, 0.02 M dicyclohexano-18-crown-6 in toluene membrane, and an aqueous receiving phase containing Mg-S/sub 2/O/sub 3/ or Mg(NO/sub 3/)/sub 2/ is used to obtain the transport data. Span 80 (sorbitan monooleate) is used as the surfactant (3% (v/v)).

• Research Organization: Brigham Young Univ., Provo, UT
• OSTI ID: 6091774
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 59:19; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ALCOHOLS
ALKALI METALS
ALKALINE EARTH METALS
ALKYLATED AROMATICS
ANIONS
AROMATICS
CADMIUM
CALCIUM
CATIONS
CHARGED PARTICLES
COLLOIDS
DATA
DISPERSIONS
EFFICIENCY
ELEMENTS
EMULSIONS
EQUATIONS
EQUILIBRIUM
EXPERIMENTAL DATA
FLUIDS
GLYCOLS
HYDROCARBONS
HYDROXY COMPOUNDS
INFORMATION
IONS
LEAD
LIQUIDS
MASS TRANSFER
MEMBRANES
MERCURY
METALS
NICKEL
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHASE STUDIES
POLYETHYLENE GLYCOLS
POLYMERS
POTASSIUM
PREDICTION EQUATIONS
SEPARATION PROCESSES
SILVER
SODIUM
STRONTIUM
SURFACTANTS
THALLIUM
TOLUENE
TRANSITION ELEMENTS
ZINC