99Tc在膨润土中的吸附和迁移行为
Sorption and Diffusion on Technetium in the Bentonite From Gaomiaozi
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摘要: 在模拟处置库条件下,采用北山地下水,用批式实验法研究了99Tc在内蒙古高庙子膨润土中的吸附行为,探讨了温度、pH值,添加剂黄铁矿(FeS2)、磁铁矿(Fe3O4)、方铅矿(PbS)、稀土赤铁矿(Fe2O3),以及CO32-、SO42-、Fe2+、Fe3+等对吸附行为的影响。研究结果表明,高庙子膨润土对99Tc具有一定的吸附阻滞能力,其吸附Kd值为98.4 mL/g。Abstract: The adsorption behavior of 99Tc in the bentonite was studied in anoxic conditions by batch method. The effect of temperature, pH value, pyrite, copper pyrite, galenite, hematite and the concentration of CO32-, SO42-, Fe2+, Fe3+ on the sorption behavior of 99Tc in the bentonite was studied. The results show that the Kd value of 99Tc in the bentonite is 98.4 mL/g.