Evaluation of sorption condition of polyvalent metal ions by multidimensional spectroscopic approach

Sasaki, Takayuki*; Kobayashi, Taishi*; Fujiwara, Kenso; Dohi, Terumi; Iijima, Kazuki

no journal, , 

Development of more reliable sorption reaction model is essential for estimating a behavior of radionuclide migration in the environment, which contributes to the safety assessment of waste disposal of contaminated soil and wastes. Observation by various spectroscopic methods is helpful to understand a chemical condition of metal ions sorbed on soil and host rock surface. The TEM-EELS and TEM-EDS methods were used in the present study. These have been applied to lighter elements, while very few studies for heavier metals. Therefore, Eu and Zr as analogs of tri and tetravalent actinides were examined. After attaching powder samples on a copper grid, a thin layer of carbon was deposited to prevent charge-up. No peak except zero loss in the spectrum was obtained for Eu oxide, since the particle size was too large and the electron transmission in the sample might be suppressed. The EDS peaks of Zr(acac)4 were clearly observed, and also small sharp peaks in EELS were observed at the edges of Zr and O.