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中文摘要：
以西南某极低放废物处置库预选场址地质环境中板岩与土壤为吸附介质,通过吸附实验和解吸实验,研究了不同介质粒径、环境温度（10℃—50℃）、水相pH（4—12）对239Pu核素在板岩与土壤介质中吸附行为的影响特征.吸附实验表明,水相环境中板岩和土壤介质对239Pu核素的吸附过程在10 d左右达到平衡,并且其吸附分配比随着介质粒径的减小而增大,随着水相pH值的增大而增大,但温度对其吸附的影响不明显.解吸实验表明板岩和土壤介质对239Pu核素的吸附是可逆的.
英文摘要：
The slate and soil in a pre-selected low level radioactive waste repository site in southwest China was used as medium for 239Pu adsorption.The adsorption and desorption experiments were carried out.The effect of the grain size of medium,temperature（10 ℃—50 ℃） and pH（4—12） on 239Pu adsorption behavior in the slate and soil was carefully investigated.The results showed that the equlibrium time of 239Pu adsorption in the slate and soil both was about 10 days,and the distribution ratio of adsorption increased with the decrease of medium size and increase of solution pH.However,temperature had no significant effect on the adsorption.Desorption experiments showed 239Pu adsorption in the slate and soil was reversible.
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