Marrero T W, Morris J S, Manahan S E
Research Triangle Institute, Intl., 3040 Cornwallis Road, Research Triangle Park, NC 27709-2194, USA.
Chemosphere. 2004 Feb;54(7):873-85. doi: 10.1016/j.chemosphere.2003.10.009.
The uses of a thermally reductive gasification process in conjunction with vitrification and cementation for the long-term disposal of low level radioactive materials have been investigated. gamma-ray spectroscopy was used for analysis of carrier-free protactinium-233 and neptunium-239 and a stoichiometric amount of cerium (observed cerium-141) subsequent to gasification and leaching, up to 48 days. High resolution ICP-MS was used to analyze the cerium, thorium, and uranium from 46 to 438 days of leaching. Leaching procedures followed the guidance of ASTM Procedure C 1220-92, Standard Test Method for Static Leaching of Monolithic Waste Forms for Disposal of Radioactive Waste. The combination of the thermally reductive pretreatment, vitrification and cementation produced a highly non-leachable form suitable for long-term disposal of cerium, thorium, protactinium, uranium, and neptunium.
研究了热还原气化工艺与玻璃化和胶结相结合用于低水平放射性物质长期处置的情况。在气化和浸出后长达48天的时间里，使用γ射线光谱法分析无载体镤-233和镎-239以及化学计量的铈（观测到的铈-141）。使用高分辨率电感耦合等离子体质谱法分析浸出46至438天的铈、钍和铀。浸出程序遵循美国材料与试验协会C 1220-92程序《放射性废物处置用整体废物形式静态浸出的标准试验方法》的指导。热还原预处理、玻璃化和胶结的组合产生了一种高度不可浸出的形式，适用于铈、钍、镤、铀和镎的长期处置。
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