摘要
本文分别采用90Sr、137Cs为指示剂,均匀混入富铝碱矿渣水泥和525#水泥中制成圆柱形废物固化体。于25℃、40℃、70℃三种恒温条件下,以现场水为浸出剂(按照GB7023-86)进行长期浸出实验,考察了温度和时间对浸出率的影响。结果表明:同样条件下锶、铯在碱矿渣水泥中的浸出率比在525#水泥中低1~2个数量级;温度对浸出率的影响较大,70℃时明显高于室温下的浸出率。碱矿渣水泥在阻止90Sr、137Cs浸出性能方面明显高于目前采用的525#水泥,将是一种有广泛应用前景的新型放射性废物固化材料。
Columniform cement solidified product were maken by adding to indicator of ^90Sr and ^137Cs. Under the three constant temperatures of 25℃ ,40℃ ,70℃ ,leaching rates were measured in different times according to the GB7023 -86. The locale water is used to leaching water. The conclusion shows that the leaching rates of ^90Sr and ^137Cs in alkali - slay cement were higher 10 - 10^2 times than that in 525# cement. The leaching rates in 70℃were higher than in the normal temperature, so the temperature is a very important factor to influence leaching rate. The conductance of leaching water are constantly reduced with the time pasting. The alkali - slay cement have better performance in holding back unclide than the 525# cement that is used widely. So we predict this material will be a type radioactive waste solidified material and be used widely.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2006年第3期252-256,共5页
Chemical Research and Application
