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Journal Articles

Influence of humic substances on the $$^{63}$$Ni migration through crushed rock media

Tanaka, Tadao; Sakamoto, Yoshiaki; Mukai, Masayuki; Maeda, Toshikatsu; Nakayama, Shinichi

Radiochimica Acta, 92(9-11), p.725 - 729, 2004/12

 Times Cited Count:1 Percentile:89.36(Chemistry, Inorganic & Nuclear)

Migration experiments of $$^{63}$$Ni for crushed rocks, granite and tuff, were performed under the coexistent condition with a humic acid and a fulvic acid of 0-30 mg/l in concentration, which are Nordic humic substances supplied from International Humic Substance Society. Migration experiments of Ni had been performed by a column system, to investigate migration behavior of Ni through a column packed crushed rock. The Ni concentration in the effluent passed through the column was corresponding to the fractional percentage of Ni complexing with humic substance in influent solution. This result suggests that the Ni complexing with humic substance in influent solution was flowed out from the column without any effective interactions with the rock media. The migration behavior of Ni could be expressed by a migration model taking account of the complexation kinetics of Ni with humic substance in the aqueous phase.

Journal Articles

Migration models of neptunium and americium in groundwater under the present condition of humic substances

Tanaka, Tadao; Sakamoto, Yoshiaki; Sawada, Hiroshi; Ogawa, Hiromichi

JAERI-Conf 2003-010, p.134 - 141, 2003/09

We have performed migration experiments of Np(V) and Am(III) for crushed granite, under the coexistent condition with humic acid substance. As for Np, the periodical concentration changes in the breakthrough curve and the migration velocity of Np passed through the column were not affected by the coexistence of the humic substance. As for Am, on the other hand, the periodical concentration changes in the breakthrough curve were affected by the humic substance concentration. The migration behavior of Am passed through the present column system could be expressed by a migration model taking account of the non-equilibrium state.

Journal Articles

Speciation of Eu(III) in an anion exchange separation system with LiCl-H$$_{2}$$O/alcohol mixed media by time-resolved laser-induced fluorescence spectroscopy

Arisaka, Makoto*; Kimura, Takaumi; Suganuma, Hideo*; Yoshida, Zenko

Journal of Radioanalytical and Nuclear Chemistry, 255(2), p.385 - 389, 2003/02

 Times Cited Count:5 Percentile:61.37(Chemistry, Analytical)

no abstracts in English

Journal Articles

In situ ATR-FTIR spectroscopy for functional groups of humic substances complexing with metal ions

Tanaka, Tadao; Sakamoto, Yoshiaki; Ogawa, Hiromichi

Genshiryoku Bakkuendo Kenkyu, 9(1), p.29 - 34, 2002/09

To obtain structural information on functional groups of humic substances complexing with metal ions, infrared (IR) spectral analysis of the humic substances dissolving in aqueous solutions has been studied by ATR (Attenuated Total Reflection) method. By using the ATR method, IR spectral shifts of humic substance due to complexation with metal ions were observed. The observation provided with information on complexation kinetics, and on characteristics of functional groups depending on solvent properties, such as pH and solute concentrations. These information was difficult to be obtained by conventional FTIR spectroscopy using powdered humic substances. The obtained results show that IR spectral shifts on the functional groups of the humic substances complexed with metal ions could be possibly characterized ${it in situ}$ by using the ATR-FTIR spectroscopy.

Journal Articles

Form of radionuclides dissolved in river at an accidentally contaminated area

Matsunaga, Takeshi; Nagao, Seiya*; Takeda, Seiji; Ueno, Takashi; Amano, Hikaru

Dai-43-Kai Kankyo Hoshano Chosa Kenkyu Seika Rombun Shorokushu (Heisei-12-Nendo), p.49 - 50, 2002/03

no abstracts in English

Journal Articles

Direct observation of Cm(III)-fulvate species on fulvic acid-montmorillonite hybrid by laser-induced fluorescence spectroscopy

Takahashi, Yoshio*; Kimura, Takaumi; Minai, Yoshitaka*

Geochimica et Cosmochimica Acta, 66(1), p.1 - 12, 2002/01

 Times Cited Count:62 Percentile:23.32(Geochemistry & Geophysics)

no abstracts in English

Journal Articles

Exisitence forms of Am(III) in the presence of humic substances in saline groundwater at pH 7-10

Nagao, Seiya; Nakaguchi, Yuzuru*; Suzuki, Yasuhiro*; Hiraki, Keizo*; Fujitake, Nobuhide*; Ogawa, Hiromichi

Proceedings of International Conference on the Biogeochemistry of Trace Elements (ICOBTE2001), P. 666, 2001/00

no abstracts in English

Journal Articles

Speciation of europium(III) sorbed on a montmorillonite surface in the presence of polycarboxylic acid by laser-induced fluorescence spectroscopy

Takahashi, Yoshio*; Kimura, Takaumi; Kato, Yoshiharu; Minai, Yoshitaka*

Environmental Science & Technology, 33(22), p.4016 - 4021, 1999/00

 Times Cited Count:44 Percentile:24.9(Engineering, Environmental)

no abstracts in English

Journal Articles

Comparative analysis of actinide(VI) carbonate complexation by Monte Carlo resampling methods

G.Meinrath*; Kato, Yoshiharu; Kimura, Takaumi; Yoshida, Zenko

Radiochimica Acta, 84(1), p.21 - 29, 1999/00

no abstracts in English

Journal Articles

Carbonate complexation of neptunyl(VI) ion

Kato, Yoshiharu; Kimura, Takaumi; Yoshida, Zenko; Shirasu, Noriko

Radiochimica Acta, 82, p.63 - 68, 1998/00

no abstracts in English

Journal Articles

Distribution coefficient in the sorption of radionuclides onto Ando soil in the presence of humic acid; Influence of the molecular size of humic acid

Tanaka, Tadao; Nagao, Seiya; Sakamoto, Yoshiaki; Onuki, Toshihiko; S.Ni*; *

Journal of Nuclear Science and Technology, 34(8), p.829 - 834, 1997/08

 Times Cited Count:13 Percentile:27.87(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Effects of humic acid on the sorption of neptunium(V) on kaolinite

*; Sato, Seichi*; Ohashi, Hiroshi*; Sakamoto, Yoshiaki; Onuki, Toshihiko; Nagao, Seiya; Muraoka, Susumu

Journal of Nuclear Materials, 248, p.328 - 332, 1997/00

 Times Cited Count:35 Percentile:8.38(Materials Science, Multidisciplinary)

no abstracts in English

JAEA Reports

Molecular size distribution of Np(V)-humate

Sakamoto, Yoshiaki; Nagao, Seiya; Tanaka, Tadao

JAERI-Research 96-055, 14 Pages, 1996/10

JAERI-Research-96-055.pdf:0.64MB

no abstracts in English

JAEA Reports

None

PNC-TJ1600 96-004, 78 Pages, 1996/03

PNC-TJ1600-96-004.pdf:2.2MB

None

Journal Articles

Molecular size and functional groups of humic substance complexing with $$^{60}$$Co and $$^{241}$$Am

Tanaka, Tadao;

Radioisotopes, 44(2), p.99 - 102, 1995/02

no abstracts in English

Journal Articles

Influence of humic acid on sorption of neptunium(V) onto soil

Sakamoto, Yoshiaki; Nagao, Seiya; Onuki, Toshihiko; ; *; Sato, Seichi*; Ohashi, Hiroshi*

Mater. Res. Soc. Symp. Proc., Vol. 353, 0, p.997 - 1004, 1995/00

no abstracts in English

Journal Articles

Sorption of $$^{60}$$Co,$$^{85}$$Sr,$$^{137}$$Cs,$$^{237}$$Np and $$^{241}$$Am on soil under coexistence of humic acid; Effects of molecular size of humic acid

Tanaka, Tadao;

Mater. Res. Soc. Symp. Proc., Vol. 353, 0, p.1013 - 1020, 1995/00

no abstracts in English

JAEA Reports

Influence of humic acid on migration of $$^{60}$$Co, $$^{85}$$Sr and $$^{137}$$Cs in coastal sandy soil

Tanaka, Tadao; N.Shiwei*

JAERI-M 93-185, 17 Pages, 1993/10

JAERI-M-93-185.pdf:0.64MB

no abstracts in English

Journal Articles

Electrode processes of plutonium ions in phosphate media

Yoshida, Zenko; Aoyagi, Hisao; *

Z. Anal. Chem., 340, p.403 - 409, 1991/00

no abstracts in English

Journal Articles

Complexation of terbium ion with the copolymer of acrylicacid and acrylamide grafted onto polyethylene

*; *; *; ;

J.Macromol.Sci.,Part A, 23(9), p.1125 - 1135, 1986/09

no abstracts in English

22 (Records 1-20 displayed on this page)