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Ozaki, Takuo; Kimura, Takaumi; Onuki, Toshihiko; Francis, A. J.
Radiochimica Acta, 94(9-11), p.715 - 721, 2006/11
Times Cited Count:10 Percentile:57.07(Chemistry, Inorganic & Nuclear)no abstracts in English
Kirishima, Akira; Kimura, Takaumi; Tochiyama, Osamu*; Yoshida, Zenko
Radiochimica Acta, 92(12), p.889 - 896, 2005/01
Times Cited Count:24 Percentile:81(Chemistry, Inorganic & Nuclear)no abstracts in English
Kirishima, Akira; Kimura, Takaumi; Tochiyama, Osamu*; Yoshida, Zenko
Journal of Alloys and Compounds, 374(1-2), p.277 - 282, 2004/07
Times Cited Count:27 Percentile:75.56(Chemistry, Physical)no abstracts in English
Zhang, P.*; Kimura, Takaumi; Yoshida, Zenko
Solvent Extraction and Ion Exchange, 22(6), p.933 - 945, 2004/00
Times Cited Count:13 Percentile:45.25(Chemistry, Multidisciplinary)no abstracts in English
Ozaki, Takuo; Arisaka, Makoto; Kimura, Takaumi; Francis, J. A.*; Yoshida, Zenko
Analytical and Bioanalytical Chemistry, 374(6), p.1101 - 1104, 2002/11
Times Cited Count:24 Percentile:57.77(Biochemical Research Methods)no abstracts in English
Kimura, Takaumi
Hosha Kagaku Nyusu, (5), p.9 - 13, 2001/12
no abstracts in English
Sasaki, Takayuki*; Ueda, Kenyo*; Saito, Takumi*; Aoyagi, Noboru; Kobayashi, Taishi*; Takagi, Ikuji*; Kimura, Takaumi; Tachi, Yukio
no journal, ,
The influence of pH, ionic strength, and the concentrations of Eu and nitrate salts on the sorption of Eu on Na-montmorillonite was investigated by batch sorption measurements. The distribution coefficient (Kd) indicated that the cation exchange reaction is significant in pH 4-7 at low ionic strength, and the formation of surface complexation is related to the pH dependence of Kd at high ionic strength. The Eu surface species were investigated using time-resolved laser fluorescence spectroscopy (TRLFS) with parallel factor analysis (PARAFAC). The PARAFAC modeling indicated two surface species, the outer-sphere (factor A) and inner-sphere (factor B) Eu complexes. Factor B was dominant at high pH and ionic strength, which was determined to be a Eu colloidal species formed at high Eu concentrations. A cation exchange model combined with a one-site non-electrostatic surface complexation model was applied to the measured Kd data, using the results of the TRLFS-PARAFAC analyses.