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Leaching of Polyphase Nuclear Waste Ceramics: Microstructural and Phase Characterization
Author(s) -
JANTZEN C.M.,
CLARKE D.R.,
MORGAN P.E.D.,
BARKER A.B.
Publication year - 1982
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1982.tb10447.x
Subject(s) - dissolution , leaching (pedology) , ceramic , radioactive waste , polyphase system , materials science , adsorption , silicate , metallurgy , passivation , mineralogy , chemical engineering , geology , chemistry , nuclear chemistry , composite material , soil water , organic chemistry , layer (electronics) , electronic engineering , soil science , engineering
The leaching of complex polyphase nuclear waste ceramics is described in the context of the geochemically established dissolution behavior of the constituent phases. Static leach tests conducted on ceramic monoliths in deionized water, in simulated silicate, and in brine groundwaters, conforming to Materials Characterization Center standards and an accelerated, microscopic leach test, were used to identify the processes. Dissolution and formation of surface passivation layers are discussed in terms of hydrolysis and the adsorption of the metal hydroxocomplexes onto the monolith surface. The factors observed to affect dissolution are pertinent to the leaching of other polyphase nuclear waste ceramics.