Effect of receiving phase anion on macrocycle-mediated cation transport rates and selectivities in water-toluene-water emulsion membranes

Journal Article · Thu Mar 31 23:00:00 EST 1983 · Sep. Sci. Technol.; (United States)

DOI:https://doi.org/10.1080/01496398308068570· OSTI ID:5862852

Christensen, J J; Christensen, S P; Biehl, M P; Lowe, S A; Lamb, J D; Izatt, R M

Relative transport rates of metal nitrates (Na/sup +/, K/sup +/, Rb/sup +/, Cs/sup +/, Ag/sup +/, Tl/sup +/, Mg/sup 2 +/, Ca/sup 2 +/, Sr/sup 2 +/, Ba/sup 2 +/, Zn/sup 2 +/, and Pb/sup 2 +/) were measured alone and in combination with either Pb/sup 2 +/, Ag/sup +/, or Tl/sup +/ in a water-toluene-water emulsion membrane system. The toluene phase contained the surfactant Span 80 and the crown ether dicyclohexano-18-crown-6 (DC18C6). The aqueous receiving phase contained the lithium salt of one of the following anions: pyrophosphate, thiosulfate, hydroxide, chloride, formate, nitrate. In the case of the metal combination, chloride and formate ions were not studied. Unless significant complexation occurred both between the transported cation and the anion in the receiving phase and between the cation and DC18C6 in the membrane phase, there was little or no transport of the cation from the source phase to the receiving phase. Selective removal of Pb/sup 2 +/ and of Ag/sup +/ from binary mixtures of these cations with each of the cations listed was demonstrated using the emulsion membrane. 5 tables.

• Research Organization: Brigham Young Univ., Provo, UT
• DOE Contract Number: AC02-78ER05016
• OSTI ID: 5862852
• Journal Information: Sep. Sci. Technol.; (United States), Journal Name: Sep. Sci. Technol.; (United States) Vol. 18:4; ISSN SSTED
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ABSORPTION SPECTRA
ALCOHOLS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ANIONS
AROMATICS
CALCIUM COMPOUNDS
CALCIUM NITRATES
CARBOXYLIC ACID SALTS
CATIONS
CESIUM COMPOUNDS
CESIUM NITRATES
CHARGED PARTICLES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COLLOIDS
COMPLEXES
DATA
DIFFUSION
DISPERSIONS
ELEMENTS
EMULSIONS
EXPERIMENTAL DATA
FORMATES
GLYCOLS
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXIDES
HYDROXY COMPOUNDS
INFORMATION
IONS
LEAD
LEAD COMPLEXES
LEAD COMPOUNDS
LEAD NITRATES
LITHIUM COMPOUNDS
MAGNESIUM COMPOUNDS
MAGNESIUM NITRATES
MEMBRANE TRANSPORT
METALS
MIXTURES
NITRATES
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
POLYETHYLENE GLYCOLS
POLYMERS
POTASSIUM COMPOUNDS
POTASSIUM NITRATES
PYROPHOSPHATES
RUBIDIUM COMPOUNDS
RUBIDIUM NITRATES
SEPARATION PROCESSES
SILVER
SILVER COMPLEXES
SILVER COMPOUNDS
SILVER NITRATES
SODIUM COMPOUNDS
SODIUM NITRATES
SPECIFICITY
SPECTRA
STRONTIUM COMPOUNDS
STRONTIUM NITRATES
SURFACTANTS
THALLIUM COMPOUNDS
THALLIUM NITRATES
THIOSULFATES
TOLUENE
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WATER
YIELDS
ZINC COMPOUNDS
ZINC NITRATES