硝酸钡预处理高放废液玻璃固化体结构和抗浸出性能研究

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (6): 2287-2293.

硝酸钡预处理高放废液玻璃固化体结构和抗浸出性能研究

宁海霞¹, 安红娜¹, 雷杰², 王宾², 吴浪²

1.绵阳职业技术学院,绵阳 621000;
2.西南科技大学材料与化学学院,绵阳 621010

收稿日期:2023-10-26 修订日期:2024-01-05 出版日期:2024-06-15 发布日期:2024-06-18
通信作者: 吴浪,博士,教授。E-mail:lang.wu@163.com
作者简介:宁海霞(1981—),女,硕士研究生。主要从事功能玻璃材料的研究。E-mail:645777815@qq.com
基金资助:
国家自然科学基金(12375316);绵阳职业技术学院2022年度校级科研项目(MY22YB01)

Structure and Leaching Resistance of Ba(NO₃)₂-Pretreated High-Level Liquid Glass Waste Form

NING Haixia¹, AN Hongna¹, LEI Jie², WANG Bin², WU Lang²

1. Mianyang Polytechnic, Mianyang 621000, China;
2. School of Materials Science and Chemistry, Southwest University of Science and Technology, Mianyang 621010, China

Received:2023-10-26 Revised:2024-01-05 Online:2024-06-15 Published:2024-06-18

摘要/Abstract

摘要： 为提高硼硅酸盐玻璃对硫的包容能力,采用Ba(NO₃)₂将模拟高硫高钠废液中的SO^2-₄转变为BaSO₄,再利用熔融法制备硼硅酸盐玻璃固化体,研究了模拟高放废液掺量对玻璃固化体结构和抗浸出性能的影响。结果表明:采用Ba(NO₃)₂对模拟高硫高钠废液进行预处理后,废物包容量达到23%(质量分数)仍未发生分相;掺入模拟高放废液的玻璃固化体中的Na、B、Si元素归一化质量损失比纯硼硅酸盐玻璃低一个数量级,随着模拟高放废液掺量增加玻璃固化体抗浸出性能无明显变化。¹¹B和²⁹Si核磁共振谱分析表明,模拟高放废液的掺入使部分BO₃结构转变为BO₄结构,玻璃网络结构有所增强。

关键词: 高放废液, 硼硅酸盐玻璃, 硝酸钡, 硫酸盐, 核磁共振, 抗浸出性能

Abstract: In order to increase solubility of sulfur in borosilicate glass, SO^2-₄ ions in simulated high-level liquid waste (HLLW) with relatively high content of sulfur and sodium were pretreated by adding Ba(NO₃)₂ solution, and then borosilicate glass waste form was prepared by melt-quenching method. The effects of pretreated HLLW on the structure and leaching resistance were mainly investigated. The results show that the waste loading can be increased to 23% (mass fraction) without phase separation after the Ba(NO₃)₂ pretreatment. The normalized elemental mass loss of Na, B and Si of the HLLW-loaded samples are one order of magnitude lower than that of the pure borosilicate glass. Furthermore, the leaching resistance of the glass waste form has no significant change with increasing HLLW content. ¹¹B and ²⁹Si MAS NMR analyses indicate that part of BO₃ transforms into BO₄ structural units and a polymerization of the glass network occurs after HLLW addition.

Key words: high-level liquid waste, borosilicate glass, barium nitrate, sulfate, nuclear magnetic resonance, leaching resistance

中图分类号:

TQ171

宁海霞, 安红娜, 雷杰, 王宾, 吴浪. 硝酸钡预处理高放废液玻璃固化体结构和抗浸出性能研究[J]. 硅酸盐通报, 2024, 43(6): 2287-2293.

NING Haixia, AN Hongna, LEI Jie, WANG Bin, WU Lang. Structure and Leaching Resistance of Ba(NO₃)₂-Pretreated High-Level Liquid Glass Waste Form[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(6): 2287-2293.

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