Department of Radioecology, Institute for Environmental Sciences, Rokkasho, Japan.
Radiat Prot Dosimetry. 2022 Sep 9;198(13-15):943-946. doi: 10.1093/rpd/ncac017.
Radioactive ruthenium may be accidentally released from spent nuclear fuel reprocessing plants to the surrounding environment. To obtain basic information regarding the effect of radioactive ruthenium on the environment, we investigated changes in the source form of stable ruthenium added to rainwater through X-ray absorption fine structure analysis. Ruthenium tetroxide (RuO4), ruthenium dioxide (RuO2), ruthenium nitrosyl nitrate (Ru(NO)(NO3)3) and ruthenium chloride (RuCl3) were employed as test sources. The Ru K-edge X-ray absorption near edge structure spectra acquired immediately after addition to ultrapure water differed among various sources. With RuO4 addition, a black deposit was observed 1 d after addition, and the spectrum was similar to that of RuO2. For RuO2, Ru(NO)(NO3)3 and RuCl3, no variances were observed between the spectra acquired immediately after addition and 1 d after addition. These results indicate that the chemical forms of RuO2, Ru(NO)(NO3)3 and RuCl3 did not change within a 1-d span in rainwater.
放射性钌可能会从乏核燃料后处理厂意外释放到周围环境中。为了获得放射性钌对环境影响的基本信息，我们通过 X 射线吸收精细结构分析研究了添加到雨水中的稳定钌的源形态的变化。四氧化钌（RuO4）、二氧化钌（RuO2）、亚硝酰基硝酸钌（Ru(NO)(NO3)3）和氯化钌（RuCl3）被用作测试源。在添加到超纯水后立即获得的 Ru K 边 X 射线吸收近边结构光谱在不同的源之间存在差异。添加 RuO4 后，添加 1 天后观察到黑色沉积物，其光谱与 RuO2 的光谱相似。对于 RuO2、Ru(NO)(NO3)3 和 RuCl3，添加后立即获得的光谱与添加 1 天后获得的光谱之间没有差异。这些结果表明，在雨水中 1 天的时间内，RuO2、Ru(NO)(NO3)3 和 RuCl3 的化学形态没有变化。
