湿法冶金2025，Vol.44Issue(6)：749-758,10.DOI:10.13355/j.cnki.sfyj.2025.06.006
长石、伊利石和高岭土对Se(Ⅳ)的吸附试验研究
Adsorption of Se(Ⅳ)with Feldspar,Illite and Kaolin
摘要
Abstract
In the geological disposal of high-level radioactive waste,the mineral composition of surrounding rock and buffer materials is complex.Therefore,research is conducted from the perspective of rock composition to simplify research process of nuclide migration in geological media.The adsorption behavior of common minerals such as feldspar,illite and kaolinite on Se(Ⅳ)in granite,clay rock and bentonite was studied through batch experiments.The results show that under different conditions such as contact time,solution pH,ionic strength,initial mass concentration of Se(Ⅳ),solid mass to liquid volume ratio and temperature,the variation laws of the adsorption rates of Se(Ⅳ)by the three minerals are consistent,while the adsorption capacity of illite for Se(Ⅳ)is slightly higher than that of the other two minerals.The adsorption processes of Se(Ⅳ)by the three minerals all follow the pseudo-second-order kinetic model,which conforms to the Freundlich isotherm model,and the adsorption process is a spontaneous endothermic reaction.It is found through SEM,XRD and FT-IR characterization that there are no obvious changes in the three minerals before and after the adsorption of Se(Ⅳ).关键词
Se(Ⅳ)/吸附/长石/伊利石/高岭土/高放废物/地质处置/围岩Key words
Se(Ⅳ)/adsorption/feldspar/illite/kaolin/high-level radioactive waste/geological disposal/surrounding rock分类
矿业与冶金引用本文复制引用
张慧,王驹,周志超,凌辉..长石、伊利石和高岭土对Se(Ⅳ)的吸附试验研究[J].湿法冶金,2025,44(6):749-758,10.基金项目
国家自然科学基金资助项目(U2267217) （U2267217）
国家国防科技工业局核设施退役与放射性废物处理专项项目(科工[2020]2号194). （科工[2020]2号194）
