Published January 2017 | Version v1
Journal article Metadata-only

Understanding the extraction mechanism, radiolytic stability and stripping behavior of thorium by ionic liquid based solvent systems. Evidence of 'ion-exchange' and 'solvation' mechanism

Creators

  • 1. University of Delhi, Delhi (India). Kirori Mal College
  • 2. Bhabha Atomic Research Centre, Mumbai (India). Radiochemistry Division
  • 3. Bhabha Atomic Research Centre, Mumbai (India). Radiometallurgy Division

Description

The extraction efficiency for thorium followed the trend: Cyanex-923 > Cyanex-272 > DHOA > TBP. In case of TBP and DHOA the extraction proceeded via 'solvation mechanism' through Th(NO3)4·2L, while for Cyanex-923 and Cyanex-272 it proceeded via 'ion exchange' mechanism through (Th(NO3)2·2L)2+. The extraction process followed slower kinetics while change in Gibb's energy revealed the spontaneity of the process. These ionic liquid based systems were found to be radiolytically stable, highly efficient and selective for Th. Oxalic acid was found to be suitable for almost quantitative stripping of Th from extracted ionic liquid phase. (author)

Additional details

Publishing Information

Journal Title
Journal of Radioanalytical and Nuclear Chemistry
Journal Volume
311
Journal Issue
1
Journal Page Range
p. 195-208
ISSN
0236-5731
CODEN
JRNCDM

INIS

Country of Publication
Hungary
Country of Input or Organization
Hungary
INIS RN
48010834
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
GIBBERELLIC ACID; MOLTEN SALTS; OXALIC ACID; SOLVATION; SOLVENT EXTRACTION; TBP; THORIUM
Descriptors DEC
ACTINIDES; BUTYL PHOSPHATES; CARBOXYLIC ACIDS; DICARBOXYLIC ACIDS; ELEMENTS; ESTERS; EXTRACTION; HETEROCYCLIC COMPOUNDS; HYDROXY ACIDS; LACTONES; METALS; ORGANIC ACIDS; ORGANIC COMPOUNDS; ORGANIC PHOSPHORUS COMPOUNDS; PHOSPHORIC ACID ESTERS; SALTS; SEPARATION PROCESSES

Optional Information

Notes
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