世界核地质科学2025，Vol.42Issue(1)：123-133,11.DOI:10.3969/j.issn.1672-0636.2025.01.010
偏高岭土基地聚合物在处理低水平放射性废液中的应用研究
Application of metakaolin based polymer in the treatment of low level radioactive waste liquid
摘要
Abstract
The development of nuclear energy is inseparable from the treatment and disposal of radioactive waste.Geopolymer is a promising radioactive waste solidification material.In this study,metakaolin was used as the substrate to prepare metakaolin polymer,which was used to solidify Cs and real radioactive waste.The properties of metakaolin geopolymer were investigated by characterization and leaching experiments.Characterization experiments show that metakaolin geopolymer with three-dimensional network structure has high compressive strength,which can meet the strength requirements of radioactive waste solidified body.At the same time,the solidification of Cs in metakaolin polymer is uniform.However,the incorporation of Cs will hinder the growth of silicon and aluminum network skeleton and reduce the gel structure of the system,resulting in the increase of porosity and the decrease of compressive strength of geopolymer cured body.The leaching experiments of Cs and real waste water in deionized water and real groundwater show that metakaolin polymer has excellent Cs retention ability,and has low leaching rate and cumulative leaching fraction,which is better than the value specified in the national standard.In general,metakaolin geopolymer performs well in physical compression resistance and Cs retention,and is a material with great application potential.关键词
偏高岭土/地聚合物/放射性废液/浸出率/累积浸出分数Key words
metakaolin/geopolymer/radioactive waste liquid/leaching rate/cumulative leaching fraction分类
核科学引用本文复制引用
成建峰,张奇,宗自华,董艳辉,曹胜飞,彭立园..偏高岭土基地聚合物在处理低水平放射性废液中的应用研究[J].世界核地质科学,2025,42(1):123-133,11.基金项目
科技部国家重点研发计划资助项目(编号:2022YFE0120500)资助 Supported by the National Key R&D Program of China(No.2022YFE0120500) （编号:2022YFE0120500）
