Synthesis, Characterization, Sintering, and Leaching of β-TUPD/Monazite Radwaste Matrices
作者： N. Clavier , N. Dacheux , R. Podor
DOI: 10.1021/IC051607P
关键词:
摘要: To study the simultaneous incorporation of both tri- and tetravalent actinides in phosphate ceramics, we prepared several β-TUPD/monazite-based radwaste matrices through two different chemical routes (called dry wet routes) involving initial precipitation crystallized precursors each phase, i.e., TUPHPH solid solutions on one hand, rhabdophane (LnPO4·xH2O) other. The final material was obtained after heating above 1000 °C, no additional phase detected from elementary analyses XRD. Moreover, complete segregation cations evidenced when using processes. This method also allows for preparation dense pellets (90% < dexp/dcalc 95%) only 10−20 h heat treatment at 1250 °C. Finally, durability examined leaching experiments acidic media. normalized dissolution rate determined uranium release leachate varies (8.2 ± 0.7) × 10-6 to (2.7 0....
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