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Accession number;01A0231190
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| Title;Direct observation of Cm(III)-fulvate complex sorbed onmontmorillonite. |
| Author;
TAKAHASHI YOSHIO
(Hiroshimadai Daigakuinrigakukenkyuka)
KIMURA TAKAUMI
(Japan At. Energy Res. Inst.)
KATO YOSHIHARU
(Japan At. Energy Res. Inst.)
MINAI YOSHITAKA
(Musashidai Jimbun)
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Journal Title;Abstracts of Papers. Symposium on Radiochemistry
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Journal Code:F0139B
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ISSN:1345-2762
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VOL.44th;NO.;PAGE.33(2000)
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| Figure&Table&Reference; |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Among the factors controlling the behavior of trivalent actinide (An) in water-rock systems, complexation with humic substances and sorption on clay minerals are important. Because of the strong affinity of humic substances and clay minerals, it is probable that An(III) is sorbed on clay minerals as the complexes with humic substances. In this paper, Cm(III) species at a montmorillonite-water interface in the presence of fulvic acid were directly observed by laser-induced fluorescence spectroscopy. Based on the emission spectra and emission decay constants of the fluorescence from Cm(III), it was revealed that Cm(III) can be sorbed as fulvate complex on the montmorillonite surface. These facts explain the present result of batch experiments that the distribution of Cm(III) between aqueous phase and montmorillonite's surface is similar to that of fulvic acid. Based on these results, it is implied that the solid-water distributions of humic substances are important to estimate the behavior of An(III) in a natural aquifer. (author abst.) |
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