放射性碘在盐环境中的吸附和迁移行为

STUDIES OF SORPTION AND MIGRATION OF RADIOACTIVE IODINE IN A SALT ENVIRONMENT

使用放射性指示剂,分别测定了AgI和AgIO_3在各种浓盐溶液中的溶解度。采用间歇平衡实验,测试了在不同浓盐溶液中水泥、不锈钢腐蚀产物和天然岩盐(Na_3r)对I^-和IO_3^-的吸附性能,并计算了它们的吸附比。柱迁移实验与间歇平衡实验所得的结果一致。结果表明,在所研究的体系中,上述几种物质对I-均不吸附,但在强碱性浓盐溶液中,水泥能较好地吸附IO_3^-。

The maximum solubility of silver iodide and silver iodate has been investigatedin various concentrated salt solutions using a radioactivity as a tracer. A batch technique was used to determine the sorption ratio of iodide and iodateon cement, corrosion products of stainless steel and natural rock salt in variousconcentrated salt solutions. Iodide and iodate-containing solutions were subsequently passed through colu-mnsfilled with sodium chloride and natural rock salt. The results indicated thatiodide and iodate migrated with approximately the same velocity as that of thesolvent front. The results of batch technique agree with column migration expe-riment within the error limits and to be showed as follows: no sorption for I- invarious concentrated salt solutions, medium sorption for IO_3 on cement in conce-ntrated salt solutions at pH 12.