¹²⁹I (T_1/2 = 15.7 Ma) concentrations were measured in sediments from Lake Ontario, whose drainage basin contains a former nuclear fuel reprocessing facility. Three archived sediment cores had ¹²⁹I concentrations from approximately 1 × 10⁵ atoms/g in deeper sections to 1 × 10⁹ atoms/g at the surface, elevated above the nuclear weapons testing signal for North America. ¹²⁹I concentrations and ¹²⁹I/¹²⁷I ratios increase upwards and indicate a significant anthropogenic influence, with the vast majority of the ¹²⁹I in each core being found near the surface. There is also some penetration into deeper sediment layers, with pre-nuclear ¹²⁹I/¹²⁷I ratios only reached at depths of 10–13 cm. The data show that Lake Ontario sediments are a repository for anthropogenic ¹²⁹I from regional nuclear fuel reprocessing. The results point to the mobilization of iodine from anoxic, deeper sediment layers, shedding light on the geochemical behavior of iodine isotopes in Lake Ontario’s sediments.

 在安大略湖的沉积物中测量了¹²⁹ I（T _1/2 = 15.7 Ma）的浓度，该湖的流域内有一个以前的核燃料后处理设施。三个存档的沉积物核的¹²⁹ I浓度从较深部分的大约1×10 ⁵原子/ g到表面的1×10 ⁹原子/ g，高于北美的核武器测试信号。^129种我浓度和¹²⁹ I / ¹²⁷ I比向上增加，表明显著的人为影响，与绝大多数的¹²⁹我在靠近表面的每个核心中被发现。也有一些渗透进入更深的沉积层，仅在10-13 cm的深度才达到核前¹²⁹ I / ¹²⁷ I的比率。数据显示，安大略湖沉积物是来自区域核燃料后处理的人为¹²⁹ I的储存库。结果表明，从缺氧的，较深的沉积物层中调集了碘，从而阐明了安大略湖沉积物中碘同位素的地球化学行为。