Abstract The treatment and disposal of the spent organic solvents is a crucial step in minimizing wastes from nuclear fuel reprocessing in a closed fuel cycle that will enable the sustainable development of nuclear energy. In this study, the Fenton oxidation was used for the stabilization and volume reduction of the spent organic solvents - tributyl phosphate/odourless kerosene (TBP/OK = 9/21 (v/v)). The parameters of the Fenton oxidation for the spent organic solvents were optimized. The volume reduction efficiency reached 93%, and more than 35% of TBP/OK was degraded. The composition of the aqueous and oil phases of both the Fenton residual liquid and the off-gas condensate was analyzed according to the experimental results of Fourier transform infrared (FTIR), elemental analysis and ion chromatography (IC). The residual sludge contained Fe(OH)3, Fe(OH)2, FePO4·2H2O and TBP/OK degradation products. The possible degradation pathway of TBP/OK was proposed. The results of this study may provide useful information for subsequent treatment and disposal of the spent organic solvents.

中文翻译：

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Fenton氧化降解核燃料后处理厂废有机溶剂

摘要 废有机溶剂的处理和处置是最大限度减少封闭燃料循环中核燃料后处理产生的废物的关键步骤，这将使核能的可持续发展成为可能。在这项研究中，芬顿氧化用于稳定和减少废有机溶剂的体积 - 磷酸三丁酯/无味煤油 (TBP/OK = 9/21 (v/v))。对废有机溶剂的芬顿氧化参数进行了优化。减容效率达到93%，TBP/OK降解35%以上。根据傅里叶变换红外（FTIR）、元素分析和离子色谱（IC）的实验结果，分析了芬顿残液和尾气冷凝物的水相和油相组成。残留污泥中含有 Fe(OH)3，Fe(OH)2、FePO4·2H2O 和 TBP/OK 降解产物。提出了TBP/OK可能的降解途径。本研究的结果可为废有机溶剂的后续处理和处置提供有用的信息。