EXTRACTION OF AM(III), EU(III) AND U(VI) FROM PERCHLORIC-ACID AND MIXTURES OF ACIDS BY DIALKYL-(DIARYL) [DIETHYLCARBAMOYLMETHYL] PHOSPHINE OXIDES

被引:23
作者
CHMUTOVA, MK
LITVINA, MN
NESTEROVA, NP
MYASOEDOV, BF
KABACHNIK, MI
机构
[1] Vernadskv Institute of Geochemistry and Analytical, Chemistry of the Academy of Sciences of the USSR, Moscow
关键词
D O I
10.1080/07366299208918114
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Extraction of Am(III), Eu(III) and U(VI) from perchloric acid solutions by dialkyl(diaryl) (diethylcarbamoylmethyl] phosphine oxides (CMPO) has been investigated. It has been shown that elements are extracted more effectively from perchloric acid solutions than from nitric acid. An "anomalous aryl effect" increases sufficiently in perchloric media as compared with nitric media. Solvate numbers of elements also increase in perchloric acid, they being extremely high for aryl-substituted reagents and not so high for alkyl-substituted compounds. It has been shown that in HNO3 and HClO4 solutions the value of "anomalous aryl effect" directly depends on the difference in values of element solvate numbers in complexes with aryl- and alkyl-substituted CMPO. Am(III), Eu(III) and U(VI) are not practically extracted from phosphoric and sulphuric acids by CMPO solutions. The influence of HClO4 concentration on element extraction from different acid solutions has been studied; a considerable increase of distribution coefficients, in some cases sinergetic increase, has been found. The method of increasing efficiency of element extraction from acid solutions by adding small amounts of HClO4 has been suggested for extraction and preconcentration of Am(III) and U(VI) from HNO3, H3PO4 and H2SO4 solutions,
引用
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页码:439 / 458
页数:20
相关论文
共 16 条
[11]   BIS-(DISUBSTITUTEDPHOSPHINYL)-ALKANES .4. EXTRACTION OF MINERAL ACIDS URANIUM(6) AND SOME LANTHANIDES [J].
MROCHEK, JE ;
BANKS, CV .
JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1965, 27 (03) :589-&
[12]   EFFECT OF THE STRUCTURE OF DIALKYL (ARYL) [DIALKYLCARBAMOYLMETHYL] PHOSPHINE OXIDES ON THEIR EXTRACTION CAPACITY AND SELECTIVITY [J].
MYASOEDOV, BF ;
CHMUTOVA, MK ;
KOCHETKOVA, NE ;
KOIRO, OE ;
PRIBYLOVA, GA ;
NESTEROVA, NP ;
MEDVED, TY ;
KABACHNIK, MI .
SOLVENT EXTRACTION AND ION EXCHANGE, 1986, 4 (01) :61-81
[13]   EXTRACTION OF LANTHANIDE CHLORIDES, NITRATES, AND PERCHLORATES BY METHYLENEBIS(DI-N-HEXYLPHOSPHINE OXIDE) AND RELATED EXTRACTANTS [J].
OLAUGHLI.JW ;
JENSEN, DF .
ANALYTICAL CHEMISTRY, 1969, 41 (14) :2010-&
[14]  
Rozen A.M., 1978, RADIOKHIMIYA, V20, P725
[15]  
ROZEN AM, 1982, DOKL AKAD NAUK SSSR+, V263, P938
[16]  
ROZEN AM, 1986, RADIOKHIMIYA, V28, P407