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用批式实验法,在25℃恒温条件下测定了15种国产矿物、工业产品在示踪的预平衡水或蒸馏水中对I~-和TcO_4~-离子的吸附比。结果表明,灰硒汞矿和杏壳活性炭对碘的吸附比为10~3mL·g~(-1)量级;锑赭石、杏壳活性炭和脆硫锑铅矿对锝的吸附比为10~4mL·g~(-1)量级。这些材料可被考虑用作回填材料的候选组分,以提高处置库阻滞碘、锝阴离子迁移的能力。试验材料在预平衡水中和去离子水中对碘、锝的吸附比的比较表明,尽管个别材料的两个吸附比相差5倍,但在多数情况下,相差仅在2倍左右。我们认为,使用示踪去离子水进行吸附材料的筛选是可行的。
The adsorption ratio of I ~ - and TcO_4 ~ - ions of 15 kinds of domestic minerals and industrial products in tracer of pre-equilibrium water or distilled water was determined by batch experiment at 25 ℃. The results showed that the adsorption ratio of iodine to ash selenium and apricot shell activated carbon was on the order of 10 ~ 3mL · g -1. The adsorption ratio of antimony ocher, apricot shell activated carbon and jamesonite to technetium was 10 ~ 4mL · g -1 level. These materials can be considered as candidate components for backfill materials to enhance the ability of the repository to block the migration of iodine and technetium anions. Comparison of the adsorption ratios of iodine and technetium to pre-equilibrium water and deionized water in the test material indicates that although the two adsorption ratios of individual materials differ by a factor of 5, in most cases the difference is only about 2 times. We believe that the use of tracer deionized water adsorption material is feasible.