Computer Science
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984gecoa..48.1443j&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 48, Issue 7, pp.1443-1454
Computer Science
Scientific paper
A Dickson-type rocking autoclave has been used for studying the interaction of a synthetic groundwater solution with the non-radioactive simulated nuclear-waste form supercalcine (SPC-4), and with a mixture of supercalcine plus basalt, at 300° and 200°C at 300 bars. Over the course of a month, the concentrations of the aqueous species of Mo, Na, Si, K, Rb, Al, Cr, and H + displayed rapid change initially followed by a gradual approach to constant or nearly constant values, whereas the solids displayed very little alteration. These observations suggest that dissolution/precipitation reactions are quickly established even though the solids are very sluggish in attaining a completely altered or equilibrium state. The effects of various waste-form crystallinities and material preparations on the solution chemistry are quite different, but reproducible, and are discussed in terms of assessing potential waste forms.
Holloway John R.
Jenkins David M.
Kacoyannakis John F.
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