Geological Fate and Impact of Isosaccharinic acid (Geo-FISA)

核燃料循环产生了高放射性废物，这些废物将在深层地质设施中处置，该设施将为放射性核素在长时间（数万年）内迁移到地表提供多重屏障。Isosaccharinic acid（伊萨）是一种有机配体，由低热（中等放射性）废物（LHGW）中的纤维素材料的非生物水解产生。我们的研究表明，微生物可以在GDF相关条件下降解伊萨，这一过程可能导致优先放射性核素的沉淀。

The nuclear fuel cycle has generated higher-level radioactive wastes that will be disposed of in a deep geological facility (GDF) that will provide multiple barriers to the migration of radionuclides to the surface over prolonged timescales (tens of thousands of years). Isosaccharinic acid (ISA) is an organic ligand that is produced from the abiotic hydrolysis of cellulosic material found in Low Heat Generating (Intermediate Level Radioactive) Wastes (LHGW). Our studies showed that microbes can degrade ISA under GDF-relevant conditions and this process can lead to the precipitation of priority radionuclides.