Duro et al.(2005)による〔『The dissolution of high-FeO olivine rock from the Lovasjarvi(aの頭に¨) intrusion (SE-Finland) at 25℃ as a function of pH』(1284p)から〕

『25℃におけるLovasjarvi(aの頭に¨) 貫入岩(フィンランド南東部)からの高FeOかんらん石岩のpHの関数としての溶解』


Abstract
 The high-FeO olivine-rich rock from the Lovasjarvi(aの頭に¨) intrusion (65% olivine, 20% plagioclase, 8% magnetite, 4% pyroxene and 3% serpentine) has been proposed as a potential redox-active backfill-additive in deep high level nuclear waste repositories. In this work, the authors report on kinetic dissolution studies of this solid under different pH and redox conditions performed by using a flow-through methodology. Assuming that silicon is mainly released to solution from the olivine contained in the solid, the experimental results have been adjusted to an empirical rate law as a function of proton concentration. The proton concentration reaction orders agree with results found in the literature for both acidic and alkaline pH ranges. The calculations conducted with the reactive transport code RETRASO show that at alkaline pH, the olivine rock might have a lower redox buffer capacity than expected.』

1. Introduction
2. Experimental
3. Results and discussion
 3.1. Dissolution experiments
 3.2. Modelling of the Lovasjarvi(aの頭に¨) intrusion rock dissolution behaviour
 3.3. Implications for the role of Lovasjarvi(aの頭に¨) olivine rock for the performance assessment of a deep repository for waste disposal
4. Conclusions
Acknowledgements
References



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