CAJ | 학술논문

79Se是高放废物地质处置安全评价中的重点关注的核素之一，如何有效地阻滞其在处置库环境中的迁移扩散是目前研究的热点。将金属盐溶液和有机溶剂与水滑石和膨润土混合制备，分别得到2种无机改性水滑石和9种不同的有机和无机改性膨润土，通过批次实验研究这些改性材料对Se(IV)的吸附性能。结果表明无机改性的水滑石和膨润土对Se(IV)均有较好的吸附，吸附率超过57%。而有机改性的膨润土吸附效果很差，吸附率低于10%。采用SEM和XRD对这些改性材料进行表征，结果表明：无机改性后的膨润土的比表面积和层间距均增大，有利于对Se(IV)的吸附。
79Se시고방폐물지질처치안전평개중적중점관주적핵소지일，여하유효지조체기재처치고배경중적천이확산시목전연구적열점。장금속염용액화유궤용제여수활석화팽윤토혼합제비，분별득도2충무궤개성수활석화9충불동적유궤화무궤개성팽윤토，통과비차실험연구저사개성재료대Se(IV)적흡부성능。결과표명무궤개성적수활석화팽윤토대Se(IV)균유교호적흡부，흡부솔초과57%。이유궤개성적팽윤토흡부효과흔차，흡부솔저우10%。채용SEM화XRD대저사개성재료진행표정，결과표명：무궤개성후적팽윤토적비표면적화층간거균증대，유리우대Se(IV)적흡부。
79Se is one of the high-level radioactive nuclides which is of great concern ingeological disposal safety assessment. How to effectively block that in the treatment of library environment of diffusion would still be a hotspot of current research.Two kinds of inorganic modified hydrotalcite and nine kinds of organic and inorganicmodified bentonite would be obtained by mixing the metal salt solution, organic solvents,water talc and bentonite through batch experiments of these modified material adsorption of Se (IV). Results indicated that the modified hydrotalcite and inorganic bentonite of Se (IV)had better adsorption ability and the adsorption rate raised above 57%. However, organic modified bentonite adsorption effect was very poor, whose adsorption rate falls below 10%. Then these modified materials were characterized by SEM and XRD. The results showed that the specific surface area and layer spacing of inorganic modified bentonite bothincreased which was more conducive to the adsorption of Se (IV).