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Journal Articles

Radiocesium interaction with clay minerals; Theory and simulation advances Post-Fukushima

Okumura, Masahiko; Kerisit, S.*; Bourg, I. C.*; Lammers, L. N.*; Ikeda, Takashi*; Sassi, M.*; Rosso, K. M.*; Machida, Masahiko

Journal of Environmental Radioactivity, 189, p.135 - 145, 2018/09

 Times Cited Count:9 Percentile:23.97(Environmental Sciences)

no abstracts in English

Journal Articles

Challenges for enhancing Fukushima environmental resilience, 4; Development of physical and heat treatment methods on aiming at decontamination, volume reduction and reuse of contaminated soil

Yaita, Tsuyoshi; Honda, Mitsunori; Shimoyama, Iwao; Ito, Kenichi*; Mampuku, Yuzo*; Tsuji, Takuya; Matsumura, Daiju

Nippon Genshiryoku Gakkai-Shi, 59(8), p.483 - 487, 2017/08

no abstracts in English

Journal Articles

Elucidation of Cesium sorption-desorption mechanism on clay minerals

Yaita, Tsuyoshi

Petorotekku, 37(5), p.329 - 333, 2014/05

no abstracts in English

JAEA Reports

None

*

PNC-TN9080 93-002, 26 Pages, 1992/12

PNC-TN9080-93-002.pdf:1.0MB

None

Oral presentation

Decontamination and migration control of radioactive cesium in contaminated soil

Naganawa, Hirochika

no journal, , 

no abstracts in English

Oral presentation

The Electric installation at environment of nuclear fusion, 53; Development of radiation-resistant LED lighting

Kamikawa, Masaaki*; Izumi, Keisuke*; Takemoto, Jumpei*; Kawasaki, Masaji*; Oka, Kiyoshi; Yamagata, Ryohei

no journal, , 

no abstracts in English

Oral presentation

Performance of volume reduction and structural refinement by chemical interface controlled dispersion and high-speed shearing washing technique

Ishiyama, Shintaro

no journal, , 

Chemical interface controlled dispersion and high speed shearing washing test was implemented for the purpose of performance of refinement and volume reduction, and measured micro-grained particles by laser method after washing. From these results, it is concluded that about 85% volume reduction was achieved by this technique.

Oral presentation

SPring-8 utilization research towards the technical development for Fukushima environmental recovery

Yaita, Tsuyoshi; Shiwaku, Hideaki; Kobayashi, Toru; Awual, M. R.; Suzuki, Shinichi; Motokawa, Ryuhei; Matsumura, Daiju; Tsuji, Takuya; Nishihata, Yasuo; Yoshigoe, Akitaka; et al.

no journal, , 

no abstracts in English

Oral presentation

The Cs adsorption mechanism on clay minerals and it's ion selectivity

Yaita, Tsuyoshi

no journal, , 

no abstracts in English

Oral presentation

Proposition of cesium-free mineralization for volume reduction and reuse of radioactive contaminated soil in Fukushima

Shimoyama, Iwao; Honda, Mitsunori; Kogure, Toshihiro*; Baba, Yuji; Hirao, Norie; Okamoto, Yoshihiro; Yaita, Tsuyoshi; Suzuki, Shinichi

no journal, , 

We have proposed a low-pressure sublimation method for Cs removal from radioactive-contaminated soil in Fukushima. In this work, we investigated compositional and structural changes of Cs-sorbed weathered biotite (WB) before and after low-pressure sublimation with addition of NaCl-CaCl$$_{2}$$ salts, to study Cs desorption mechanism from clay minerals. X-ray fluorescence spectroscopy clarified that 100% of Cs was removed with the salts at 700 $$^{circ}$$C. Moreover, we found that 99% of K in WB was removed as well with the salts. On the other hand, Ca increased with heating temperature. X-ray diffraction analysis clarified that the reflections from WB disappeared and a number of new reflections appeared after the treatment with the salts. These results indicate WB changed to some silicates, and we clarified that the dominant silicate was augite using transmission electron microscopy. Based on these results, we propose a new idea, Cs-free mineralization, for Cs removal from clay minerals utilizing the mechanism in which monovalent large cations are discharged with accompanying phase transition from clay minerals to other minerals.

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