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Re complexes with aminomethylenephosphonate on hydroxyapatiteHashimoto, Kazuyuki; Matsuoka, Hiromitsu; Izumo, Mishiroku
Journal of Nuclear and Radiochemical Sciences, 2(1-2), p.5 - 9, 2001/12
The radioactive rhenium complexes with phosphonate-containing ligands are good bone seeking compounds, and have been developed for the palliative treatment of metastatic bone pain. In this paper, we describe the adsorption properties of newly developed Re complexes with aminomethylenephosphonate (Re-EDTMP, EDBMP and NTMP) on hydroxyapatite, which is the major constituent of the hard tissues of bone. The influence of the shaking time, pH and the ionic strength on the adsorption was investigated. The adsorption of Re complexes was strongly affected by pH and ionic strength in a solution. The adsorption coefficient increased with decreasing pH and ionic strength. These observations suggest that one of the causes of the adsorption of Re-amp is considered the electrostatic forces between the negative 
Re-amp complex and the positive HAP surface. The adsorption affinity of the Re-amp complex for HAP increased in the order Re-EDBMP
Re-NTMPRe-EDTMP.
Takebe, Shinichi; D.Xia*
JAERI-Research 95-024, 14 Pages, 1995/03
JAERI-Research-95-024.pdf:0.73MB
no abstracts in English
Tanaka, Tadao; Onuki, Toshihiko
Geochemical Journal, 28(5), p.369 - 376, 1994/00
Times Cited Count：5 Percentile：15.98(Geochemistry & Geophysics)no abstracts in English
Yamato, Aiji; Sasaki, Noriaki; ; Miyahara, Kaname;
PNC TN1100 94-003, 355 Pages, 1993/11
Radioactive waste management research programs inevitably include laboratory solubili and sorption studies to provide data for radionuclide transport model. Estimation of lubility strongly depends on the reliability of thermodynamic data (e.g., carbonato-colexes) and may also depend on kinetic data on alteration of solubility limiting solid ases. Existing sorption data may include some kind of retardation mechanisms to be excded (e.g., precipitation). To develop these fundamental data, we must also consider a rge number of radioactive elements, a large number of factors (e.g., pH, Eh, complexinligands) in the repository environmentg, and numerous solid and aqueous species of radnuclides along with the many absorbents. Therefore, a systematic approach and researchlan are needed for obtaining and evaluation thermodynamic and sorption constants. The cus of this session was on thermodynamic data for aqueous species and solid phases imptant to the geological disposal system, on kinetic data
Co on sandTakebe, Shinichi; Yamamoto, Tadatoshi
Radioisotopes, 37(12), p.681 - 684, 1988/12
no abstracts in English
Cs and 
Sr on sandYamamoto, Tadatoshi; ; Wadachi, Yoshiki
Radioisotopes, 29(8), p.373 - 376, 1980/00
no abstracts in English
Tomitsuka, Tomohiro; Kaneya, Yusuke*; Sato, Tetsuya; Asai, Masato; Tsukada, Kazuaki; Toyoshima, Atsushi; Mitsukai, Akina; Osa, Akihiko; Nishio, Katsuhisa; Nagame, Yuichiro; et al.
no journal, ,
In order to investigate the adsorption behavior of Lawrencium (Lr, Z = 103) on a Tantalum (Ta) surface, we measured ionization efficiencies of Lr under several temperature conditions of the surface ionization. We observed ionization efficiencies of Lr which were lower than those calculated by the Saha-Langmuir equation in lower temperature region. Based on a temperature dependence of the obtained ionization efficiencies, we discuss the adsorption behavior of Lr on the Ta surface.
Iijima, Kazuki; Kitamura, Akihiro; Miyahara, Kaname
no journal, ,
Understandings of transport behaviour of radiocesium in the environment were overviewed, and distribution of other radionuclides was compared to that of radiocesium. Annual discharge of radiocesium from forest with soil particles and fine litter were around 0.1% of those of initially deposited and independent to vegetation and slope if there was enough litter and small plants. In the stream water taken nearby the flowing out point showed higher concentration of dissolved radiocesium that that of groundwater, suggesting that dissolved radiocesium was generated due to the degradation of litter or the desorption from soil and dissolved. The concentration of dissolved radiocesium in river water was lower than 1 Bq/L in all river systems. Since the direction dependency on the off-site distribution of these radionuclides were similar to that of observed in the FDNPS site, the estimation of the on-site distribution based on the off-site one was considered to be available.
retention with changing hydrophilicity of carbonate slurry, 1; Estimation of hydrophilicity on the surface of suspended solidKuwano, Ryo*; Nagaishi, Ryuji; Ito, Tatsuya
no journal, ,
The overflow event occurred in carbonate slurry wastes emitted from the 1F ALPS co-precipitation system is due to the highly viscous slurry retaining hydrogen molecules (H) formed by its radiolysis. Since this high viscosity is caused by the hydrophilicity (water absorption) of surface of suspended solid (SS) particle in the slurry, it is expected that H retention would be repressed by coating (modifying) this surface with much lower hydrophilic materials (molecules). In order to discuss the degree of repression quantitatively, it is important to estimate the hydrophilicity of SS particle surface. In this report as the first in a series of presentations, the water vapor adsorption behavior on the SS particle surface was measured under two conditions of drying and moisture adsorption by using a gas adsorption measurement apparatus, and the hydrophilicity of SS particle surface was estimated for the current and hydrophilicity-lowered slurries to be compared with each other.
