模拟高放废物玻璃固化体在处置条件下的浸出行为研究（Ⅰ）  

STUDY ON LEACHING BEHAVIOUR OF SIMULATED HIGHLEVEL WASTE FORMS UNDER REPOSITORY CONDITION(I)

作　　者：吴兆广[1] 罗上庚[1] 于承泽[1] 汤宝龙[1] 

机构地区：[1]中国原子能科学研究院

出　　处：《核科学与工程》1994年第4期340-349,共10页Nuclear Science and Engineering

摘　　要：用模拟高放废物硼硅酸盐玻璃固化体和介质（包括膨润土、凝灰岩、沸石、氧化铁粉、去离子水和模拟地下水）构成模拟处置条件下的９个浸泡体系，研究了在有介质存在条件下，玻璃固化体浸泡后的失重，玻璃体的元素浸出和浸出液的ｐＨ值变化；研究了温度和ｐＨ对浸出的影响，求出了玻璃、水反应的表观活化能为７３．０ＫＪ／ｍｏｌ。对高放废物处置库的回填材料的选择提供了优选方案。Nine leaching systems were made by borosilicate glass and different media such as bentonite tuff,zeolite,Fe_2O_3 powder,deionized water and simulated underground water for simulating dis-posal conditions.After leaching tests at 90℃,the concentrations of Na,B,Si,Al,Ca,Mg,Fe,Ti,Mn,Cr and Sr were analyzed by ICP;the mass loss of the glass samples was determined.The effects of temperature and pH on leaching process were studied, the reaction activition energy-of glass with leachant was calculated.In terms of results of the experiments, it was found that the leaching systems with bentonite and zeolite have the lowest leaching rate,therefore,the mixture of bentonite and zeolite is recommended as optimum buffer material and backfill material of repository.

关 键 词：高放废物 玻璃固化 浸出 PH 温度 回填材料 

分 类 号：TL941.113[核科学技术—辐射防护及环境保护]