Multiphase synergistic immobilization of complex trialkyl phosphine oxide end-waste into an iron-containing aluminosilicate glass-ceramic  

作　　者：Pan Tan Xiaoyan Shu Lijing Huang Sihong Luo Jing Chen Yuexiang Lu Mingfen Wen Faqin Dong Du Liu Xiaoan Li Xirui Lu 

机构地区：[1]State Key Laboratory of Environmental-friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,China [2]National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety,Southwest University of Science and Technology,Mianyang 621010,China [3]Tianfu Institute of Research and Innovation,Southwest University of Science and Technology,Chengdu 610299,China [4]Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China [5]NHC Key Laboratory of Nuclear Technology Medical Transformation,Mianyang Central Hospital,Mianyang 621010,China

出　　处：《Journal of Materials Science & Technology》2024年第18期83-97,共15页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21976146 and U2167221);the Project of State Key Laboratory of Environment-friendly Energy Materials,Southwest University of Science and Technology(No.23fksy10);the Open Foundation of Nuclear Medicine Laboratory of Mianyang Central Hospital(No.2021HYX028);the Sichuan Science and Technology Program(No.2023NSFSC0353);the Applied Basic Research Project of Science and Technology Department of Sichuan Province(No.2022NSFSC1197)。

摘　　要：The objective of this study was to address the challenges associated with complex TRPO waste,by utiliz-ing a natural aluminosilicate material to produce glass-ceramic waste forms.When the simulated waste content was below 30 wt.%,glassy waste forms were successfully obtained.Ce and Fe played crucial roles in the formation of Si-O-Ce bonds and[FeO_(4)]-tetrahedra in the glass network,which effectively immo-bilized other waste elements.However,when the waste content exceeded 30 wt.%,the waste was incor-porated into feldspar,iron-manganese crystals,fluorite ceramic,and glass.This combination of ceramic and glass matrices synergistically immobilized the waste,resulting in excellent mechanical performance and chemical durability.The leaching rates of LR_(Ce)and LR_(Nd)were remarkably low around-10^(−6)to 10^(−7)g m^(−2)d^(−1),after 42 d.Furthermore,the study also investigated the role of multi-valence elements,such as Ce,Fe,and Mn,in the formation of iron-containing aluminosilicate glass-ceramics.The findings offer a novel approach to effectively immobilize complex nuclear waste.

关 键 词：Environmental protection Complex nuclear waste ALUMINOSILICATE FLUORITE Performance 

分 类 号：TB302[一般工业技术—材料科学与工程]