模拟高放废液在煅烧过程中金属元素的化学形态分析

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关键词：高放废液；金属元素；化学形态；Tessier连续提取法

中图分类号：TL941.113 文献标识码：A 文章编号：1008-9500（2025）08-0024-04

DOI：10.3969/j.issn.1008-9500.2025.08.007

Analysis of Chemical Speciation of Metal Elements in Simulated High-Level Radioactive Waste Liquid During in the Calcination Process

XIELing'，CHENZhijie²，PENGBaolin，ZHOUYao45，LIJiangbo （1.Sichuan Natural Resources Experimental Testing and Research Center，Chengdu 61Oo84， China;2.Tianfu Industrial Technology Research Institute，Mianyang621ooo，China;3.CNNC Qingyuan Environmental Engineering Co.，Ltd.， Guangyuan610213，China;4.Harbin Engineering Universtiy，Harbin15Ooo1，China;5.CAEA Innovation Center of Nuclear Environmental Safety Technology，Mianyang621o1o，China）

Abstract：ThisarticleusestheTessiersequential extraction methodtoanalyze thechemicalformchangesofmetalelements in simulated high-levelradioactive wasteduring high-temperaturecalcination，andexplores theelementaloccuence statesat diferent calcination temperatures.Research has shown thatthecalcination process transforms elements froman amorphousstatetoacrystallinestate，forminginsolublecrystallinestates;thechemicalformsofSr，Zr，Nd，andGdudergo significant changes，with almost no exchangeable states after 500 C ，while Sr has a small amount of exchangeable states; Zr ，Nd，andGdaremainlyintheresidual state，followedbythecombined stateofcarbonateandironmanganeseoxide; the extraction rate of element forms is highest at 700‰ ，decreases at 800‰ ，and the extraction rate of Nd is lowest; the calcination temperature significantly affects the chemical form distribution of metal elements.

Keywords： high-levelradioactive waste liquid;metalelements;chemical form;Tesiersequentialextraction

高放废液煅烧工艺通过低温蒸发脱硝、干燥浓缩，再经高温煅烧，将高放废液与添加剂制成非均质固相产物[1-4]。（剩余3296字）