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Journal Articles

Use of ${it in-vitro}$ experimental results to model ${it in-situ}$ experiments; Bio-denitrification under geological disposal conditions

Masuda, Kaoru*; Murakami, Hiroshi*; Kurimoto, Noritaka*; Kato, Osamu*; Kato, Ko*; Honda, Akira

SpringerPlus (Internet), 2, p.339_1 - 339_13, 2013/07

https://doi.org/10.1186/2193-1801-2-339
 Times Cited Count：2 Percentile：5.57(Multidisciplinary Sciences)

Some of the low level radioactive wastes from reprocessing of spent nuclear fuels contain nitrates. Nitrates can be present in the form of soluble salts and be reduced by microorganisms. In this study, ${it in-vitro}$ experiments of the nitrate reduction reaction were conducted using model organic materials purported to exist in underground conditions relevant to geological disposal. A reaction model was developed and verified by running simulations against data obtained from ${it in-situ}$ experiments using actual groundwaters and microorganisms. The simulation showed a good correlation with the experimental data and contributes to the understanding of microbially mediated denitrification in geological disposal systems.

Oral presentation

Study on the relationship between organic complexiation and water pressure

Iwatsuki, Teruki; Yoshida, Haruo; Kato, Osamu*; Imakita, Tsuyoshi*; Kurimoto, Noritaka*; Hama, Katsuhiro

no journal, , 

no abstracts in English

Oral presentation

Pressure dependency of complexiation constant between trace element and organics

Iwatsuki, Teruki; Hama, Katsuhiro; Imakita, Tsuyoshi*; Kurimoto, Noritaka*; Yoshida, Haruo*; Kato, Osamu*

no journal, , 

Batch experiments on complexiation reaction between Fe ion and organics were conducted to estimate pressure dependency of reaction constant. The results show that the ratio of metal-organic complex increases with pressure. The reaction constants estimated range from 5.3$$times$$10$$^{5}$$ to 1.2$$times$$10$$^{6}$$.

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