模拟高盐、高碱中低放废液水泥固化体的浸出性能  

Study on Leaching Behavior of Cement Solidified Forms Containing Simulated High Salt and Alkali-Loaded Low and Intermediate Level Radioactive Liquid Waste

作　　者：袁燕秋[1] 李玉香[1] 陈雅斓[1] 吴浪[1] 

机构地区：[1]西南科技大学四川省非金属复合与功能材料重点实验室,四川绵阳621010

出　　处：《西南科技大学学报》2011年第2期14-18,共5页Journal of Southwest University of Science and Technology

基　　金：国防基础科研项目(A3120080126);西南科技大学国防重点学科实验室重点培育项目(08zg610302)

摘　　要：针对高盐、高碱中低水平放射性废液的特性,研究了掺合料的种类、掺量对水泥固化体Sr^(2+),Cs^(2+)的浸出性能的影响。结果表明,矿渣和粉煤灰同时掺入,对降低Sr^(2+)的浸出率较为明显;沸石、凹凸棒石的掺入,对降低Cs^+的浸出率显著。当硅酸盐水泥:矿渣:粉煤灰:沸石:凹凸棒石=4:2:2:1:1时,42 d Cs^+的累积浸出率仅为未含掺合料时的15.2%。浸出液的电导率表明,矿渣、粉煤灰、沸石、凹凸棒石的掺入对废液中的可溶性盐固化有利。用掺有矿渣、粉煤灰、沸石、凹凸棒石的硅酸盐水泥固化模拟高盐、高碱中低水平放射性废液时,固化体中Sr^(2+),Cs^+的浸出率可以满足GB14569.1-2011的要求。The influence of the addition of mineral admixtures on the leaching behavior of Sr^2 ＋ and Cs ^＋ in cement solidified forms containing simulated high salt and alkali-loaded low and intermediate level radioactive liquid waste was investigated. The results show that the addition ofboth slag and fly-ash can reduce the leach rate of Sr^2 ＋ , while the addition of zeolite and attapulgite can reduce the leach rate of Cs ^＋ obviously. The cumulative leach rate of Cs ^＋ in the solidified form with cement ： slag ： fly-ash ： zeolite ： attapulgite in the ratio of 4 ： 2 ： 2 ： 1 ： 1 is 15.2% of that in Portland Cement after leaching for 42 d. Furthermore, the addition of slag, fly-ash, zeolite, and attapulgite facilitates modified the solidification of dissoluble salts. The leach rates of Sr^2＋ and Cs^＋ in the above mineral admixtures-modified Portland cement solidified forms can satisfy the requirements of GB14569.1 -2011.

关 键 词：中低放射性废液 浸出率 水泥固化体 Sr^2+ Cs^+ 

分 类 号：TL941.11[核科学技术—辐射防护及环境保护]