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Extraction of europium (III) with supported liquid membrane containing a xylene solution of Di-2-ethylhexyl phosphoric acid

Technical Report ·
OSTI ID:5319296
;

The mechanism of europium transport through a supported liquid membrane is presented. The membrane consisted of a Teflon filter membrane with xylene solution of di-2-ethylhexyl phosphoric acid (HDEHP) as a mobile carrier held within the pores by capillary forces. Interposing the liquid membrane between two aqueous solutions of different pH, europium was transported and concentrated from the high pH solution to the low pH solution across the liquid membrane. The experiments were carried out to investigate the effects of the concentration of europium in the aqueous phase and HDEHP concentration in the membrane solution on the permeation rates of europium. The experimental results have been compared with a transport model for concentrating europium across the liquid membrane. The permeation rates of europium can be explained approximately by the diffusion process of the complex formed between europium ion and HDEHP at the membrane interface through the membrane in addition to the diffusion process of europium in the aqueous film adjacent to the membrane interface.

Research Organization:
Ames Lab., IA (USA)
DOE Contract Number:
W-7405-ENG-82
OSTI ID:
5319296
Report Number(s):
IS-M-395; CONF-820924-2; ON: DE82019122
Country of Publication:
United States
Language:
English

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
AROMATICS
DATA
DIFFUSION
ELEMENTS
ESTERS
EUROPIUM
EXPERIMENTAL DATA
EXTRACTION
FLUORINATED ALIPHATIC HYDROCARBONS
HALOGENATED ALIPHATIC HYDROCARBONS
HDEHP
HYDROCARBONS
INFORMATION
ION EXCHANGE MATERIALS
LIQUID ION EXCHANGERS
MASS TRANSFER
MATERIALS
MEMBRANES
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PH VALUE
PHOSPHORIC ACID ESTERS
PLASTICS
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
RARE EARTHS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SYNTHETIC MATERIALS
TEFLON
TIME DEPENDENCE
XYLENES