项目名称: 不同温度下腐殖质存在时放射性核素在Na基高庙子蒙脱石上的吸附作用
项目编号: No.91226113
项目类型: 重大研究计划
立项/批准年度: 2013
项目学科: 无机化学
项目作者: 郭治军
作者单位: 兰州大学
项目金额: 70万元
中文摘要: 高放废物地质处置库近场温度随时间和空间变化,而腐殖质又会随地下水达到处于处置库近场的缓冲/回填材料,因此,研究不同温度下腐殖质对放射性核素在蒙脱石/膨润土上吸附作用的影响,对于高放废物地质处置库的设计和安全评价具有重要意义。本项目拟采用静态法,通过研究不同温度下(20 、50、80 oC),pH、离子强度、吸附质浓度以及富里酸(FA)和胡敏酸(HA)对152+154Eu(III)、Th(IV)和U(VI)在Na基高庙子蒙脱石上吸附的影响,建立可定量描述吸附实验数据并具有预测能力的化学模型,为我国高放废物地质处置库的设计和安全评价提供必要的基础实验数据和化学模型。
中文关键词: 膨润土;吸附;放射性核素;腐殖质;温度效应
英文摘要: The temperature of the near field of high-level radioactive waste repository varies with time and space and humic substances (HSs) can arrive in the buffer/backfilling materials with underground water. Thereby, it is of significance for repository design and safety assessment to investigate the effect of HSs on the adsorption of radionuclides on motmorillonite/bentonite at variable temperatures. The present project focuses on the effects of pH, ionic strength, sorbate concentration, and Fulvic acid (FA) and humic acid (HA) on the adsorption of 152+154Eu(III), Th(IV) and U(VI) on Gaomiaozi Na-motmorillonite at different temperatures (20, 50 and 80 oC). Chemical models will be set up for quantitative interpretation and prediction of the adsorption. The objective is to collect fundamental adsorption data and construct chemical models for the repository design and the safety assessment of the high-level radioactive waste repository of China.
英文关键词: Bentonite;Adsorption;Radionuclide;humic substance;Temperature effect