Kinetic studies on extraction rate of uranyl nitrate in HDEHP-kerosene system
Description
The kinetics of the extraction of uranyl nitrate in the HDEHP-kerosene system has been studied using the single drop technique. The effects of concentration of UO22+ and HDEHP and pH value on the extraction rate of uranyl ion have been examined. The extraction rate measured is found to be of the first order with uranyl concentration in aqueous phase, the second order with HDEHP concentration in organic phase and zero order with the pH value. The extraction rate is increased with increasing temperature. The apparent activation energy is found to be 16.0 kJ/mol between 15-40 deg C. The kinetic mechanism would be expressed by the equations. It is suggested that the rate-controlling step may be the chemical reaction of uranyl ion with HDEHP at the interface and the formation of the interfacial complex UO2A2
Additional details
Publishing Information
- Journal Title
- Uranium Mining and Metallurgy
- Journal Volume
- 7
- Journal Issue
- 1
- Series
- Uranium Min. Metall.
- Journal Page Range
- 14-21
- ISSN
- 1000-8063
- CODEN
- YOUKE
INIS
- Country of Publication
- China
- Country of Input or Organization
- China
- INIS RN
- 20074989
- Subject category
- S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
- Descriptors DEI
- CHEMICAL REACTION KINETICS; HDEHP; KEROSENE; PH VALUE; QUANTITY RATIO; SOLVENT EXTRACTION; TEMPERATURE DEPENDENCE; URANYL COMPLEXES; URANYL NITRATES
- Descriptors DEC
- ACTINIDE COMPLEXES; ACTINIDE COMPOUNDS; COMPLEXES; ENERGY SOURCES; ESTERS; FOSSIL FUELS; FUELS; KINETICS; NITRATES; NITROGEN COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC PHOSPHORUS COMPOUNDS; OXYGEN COMPOUNDS; PETROLEUM PRODUCTS; PHOSPHORIC ACID ESTERS; REACTION KINETICS; SEPARATION PROCESSES; URANIUM COMPLEXES; URANIUM COMPOUNDS; URANYL COMPOUNDS