Solvent Extraction of Eu(III) by Dihexyl-N,N-Diethylcarbamoyl Methyl Phosphonate (DHDECMP) from Perchlorate and Nitrate Media
作者:
H. A. El-Naggar,
H. Someda,
A. Abdel-Gawad,
期刊:
Isotopenpraxis Isotopes in Environmental and Health Studies
(Taylor Available online 1991)
卷期:
Volume 27,
issue 6
页码: 284-286
ISSN:0021-1915
年代: 1991
DOI:10.1080/10256019108622542
出版商: Taylor & Francis Group
关键词: chelate;complexes;dhdecmp;distribution;distribution functions;europium nitrates;europium perchlorates;europium 152;europium 154;ph value;solvent extraction
数据来源: Taylor
摘要:
Eu(III) extraction by DHDECMP has been studied from aqueous solution of perchlorate and nitrate. In case of perchlorate the distribution of Eu was found to be first power dependent on pH and third power dependent on extractant concentration. From nitrate it was found that D for Eu(III) is also first power with respect to pH but second power dependency on DHDECMP. The reaction mechanisms have been suggested and discussed in the light of the data obtained. The effect of adding some electron donor compounds decreases the extractability of DHDECMP for Eu(III) but does not change the nature of extracted species. The equilibrium constants of all the extracted species have been calculated and discussed. The extractant behaves as a chelate in low acidic media and extracted complex species is suggested to be Eu(NO3)2DHDECMP·DHDECMP from nitrate solutions.
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