Sugimoto S, Sakaki T
Radioisotopes. 1979 Jun;28(6):361-6. doi: 10.3769/radioisotopes.28.6_361.
Tracer experiments were done in order to establish a decontamination process of 106Ru in radioactive waste solution by column method paying special attention on the solution of nitratonitrosyl complex of Ru which is often encountered as a low level radioactive waste solution. It turned out that metallic iron was the most effective decontaminating agent among the several tens of materials tested. The decontamination factor (DF) of 106Ru increased in proportion to the total surface area of iron and it sensitively depended on the oxidation state of the surface as revealed by the batchwise and columnwise tests. Iron samples with high corrosiveness gave a much larger DF than those with low corrosiveness. The decontamination process proceeded as iron was being oxidized via Fe(metal)leads toFe(II)leads toFe(III). As the results, the DF initially increased after initiating the passage of water through the column but it then decreased as the oxidation process became inactive. An excellent durability up to 10000 bed volumes was demonstrated by the column method at a high average DF of 150.
为了建立一种通过柱法对放射性废液中的¹⁰⁶Ru进行去污的工艺，开展了示踪剂实验，特别关注作为低水平放射性废液经常遇到的Ru的硝酸亚硝酰络合物溶液。结果表明，在测试的几十种材料中，金属铁是最有效的去污剂。¹⁰⁶Ru的去污因子（DF）与铁的总表面积成正比，并且如分批和柱式测试所表明的，它敏感地取决于表面的氧化态。高腐蚀性的铁样品比低腐蚀性的铁样品具有大得多的DF。去污过程随着铁通过Fe（金属）→Fe（II）→Fe（III）被氧化而进行。结果，在开始通水通过柱子后，DF最初增加，但随着氧化过程变得不活跃，它随后降低。柱法在150的高平均DF下显示出高达10000床体积的优异耐久性。
