【摘要】 为了选择合适的添加剂以提高岩土对锶的吸附能力,采用测定吸附比的方法,选择8种添加剂加入到4种基础物料中进行实验。结果表明,在①号基础物料中,加入Na2S和Na2CO3两种添加剂后,Kd值从16.5分别增加到3.07×103和2.03×103;在②号基础物料中,加入Na2S和Na2CO3后,Kd值从26.0分别增加到3.50×103和2.20×103,达到极低放废物填埋处置的屏障要求。对添加剂的屏障机制进行了探讨,认为产生SrCO3沉淀是提高吸附比的主要原因。更多还原

【Abstract】 In order to improve the adsorptive capability of soil to strontium,the appropriate eight additives and four basic materials were selected through measuring the adsorption（ratio.） The results show that the K_d value rises respectively from 16.5 to 3.07×10³ and（2.03×）（10³ when） Na₂S and Na₂CO₃ were added to the No.1 basic material.So did the No.2 basic material,the K_d value rises respectively from 26.0 to 3.50×10³ and 2.20×10³.Therefore the addition of Na₂S and Na₂CO₃ can meet the barrier need of very low-level radioactive’s disposal.The barrier mechanism of additive was discussed,the main factor of the adsorption ratio’s（improvement） is the formation of SrCO₃.更多还原