静态批示法研究铯在新疆托克逊粘土上的吸附分配比

摘要

采用静态批示法研究了Cs在新疆托克逊粘土上的吸附行为,分析了平衡时间、pH、固液比利粘土粒度对Cs在粘土上吸附性能的影响.结果表明,Cs在粘土上约7天达到吸附平衡,吸附分配系数Rd为487 mL·g-1,Cs的吸附分配比随固液比、粘土粒度、液相铯浓度的增大而减小,随pH增大而增大,计算得Cs在粘土层中迁移速率为0.214 m·a-1.结果表明,粘土对铯的吸附能力较强,粘土是核废物处置的较好的备选回填材料.%The distribution of Sr on Tuokexun silty clay was studied by batch experiments.The factors that affected the absorption experiment were size of rock,pH,and ratio of solid.In conclusion,the adsorption equilibrium is achieved within 7d and distribution coefficiency(Rd) is 487 mL · g-1,the value of distribution in the rocks was increased while size of rock was decreased,meanwhile,the pH and ratio of solid to liquid was increased.Migration rate of Cs in silty clay is 0.214m · a-1.Silty clay is a very good backfill material for Cs in nuclear waste disposal.