Determination of the stability constants of Pu(VI) carbonate complexes by capillary electrophoresis coupled with inductively coupled plasma mass spectrometer

被引：4
|
作者：
Alexandre, Jean-Charles [1 ,2 ]
Dacheux, Nicolas
Aupiais, Jean [1 ,2 ]
机构：
[1] CEA, DAM, DIF, F-91297 Arpajon, France
[2] Univ Montpellier, ENSCM, ICSM, CEA,CNRS,Site Marcoule, F-30207 Bagnols Sur Ceze, France
来源：
RADIOCHIMICA ACTA | 2018年 / 106卷 / 10期
关键词：
Radiochemistry; environment; speciation of actinides; plutonium hexavalent; carbonate ligand; capillary electrophoresis; ICP-MS; EQUILIBRIA; SPECIATION; U(VI); NP(V); MS;
D O I：
10.1515/ract-2018-2929
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
New determination of the stability constants related to the Pu(VI)/carbonate chemical system has been obtained by coupling capillary electrophoresis and ICP-MS at the ionic strength of 0.202 m in NaClO4 and for a temperature of 25 degrees C. The following values have been obtained: log(10) beta(PuO2CO3) = 8.12 +/- 0.02, log(10) beta(PuO2(CO3)22-) = 13.96 +/- 0.04, and log(10) beta(PuO2(CO3)34) = 18.10 +/- 0.03. Based on the values selected by AEN/OECD, the interaction coefficients have been re-evaluated as follows: epsilon(PuO2CO3) = 0.02 +/- 0.21, epsilon(PuO2(CO3)22-,Na+) = 0.12 +/- 0.08, and epsilon(PuO2(CO3)34-,Na+) = 0.14 +/- 0.18 kg.mol(-1).
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页码：801 / 807
页数：7
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