Speciation and solubility of neptunium in underground environments by paper electrophoresis |
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| Authors: | S Nagasaki S Tanaka Y Takahashi |
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| Institution: | (1) Nuclear Engineering Research Laboratory, Faculty of Engineering, University of Tokyo, Tokai-mura, Ibaraki-prefecture, Japan |
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| Abstract: | Speciation and solubility of neptunium were studied using paper electrophoresis, ion exchange and ultrafiltration. Among these methods, the paper electrophoresis was found to be suitable for measuring speciation and solubility of neptunium of low concentration, if chemical species had opposite charge each other or dissolved species had a charge. Using paper electrophoresis, hydrolysis constants of NpO2OH0 and NpO
2
–
(OH)
2
–
and solubility product of NpO2 were obtained and ionic-strength dependence of speciation was observed. |
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