【摘要】 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TcO₄^-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10³mL·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10⁴mL·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。更多还原

【Abstract】 By using batch sorption experiments to determine sorption ratios for I and TcOi" ions have been completed. Fifteen kinds of industrial products and minerals from China were tested. Tests were performed at onstant temperature in traced pre-equilibrated water or deionized water. The test results show that the sorption ratios of I for tiemannite and active carbon of apricot-shell are of the order 103 mL/g?while the sorption ratio of TcO^" for jamesonite is of the order 104 mL/ g. These materials can be considered as selected backfill materials to improve capability of depository for preventing iodine and technetium ions from migrating. Comparing results of sorption ratios of I~ and TcOi" from both in pre-equilibrated water and deionized water * in most cases values are nearly the same. Although the difference of sorption ratio between two solutions for a few materials is as high as 5 times, it is still feasible for screening sorption materials by using traced deionized water system.更多还原