학술논문
Chemical Hardness Effect on Cationic Nuclide Decontamination Process from Low-Level Radioactive Spent Ion Exchange Resin / 저방사성 폐이온교환수지로부터 양이온 핵종 제염에 대한 화학적 경도의 영향
Document Type
Dissertation/ Thesis
Author
Source
Subject
Language
English
Abstract
The spent ion exchange resin (SIER) presents issues in the management of radioactive solid waste. To minimize the volume of solid waste, decontamination is necessary. Acid treatment is popularly used for decontamination of SIER. In this study, we assumed that the ion selectivity based on the chemical hardness of exchange ions would influence the desorption efficiency. Desorption efficiency was compared based on the concentration of hydrogen ions as exchange ions and sodium ions. Overall, sodium demonstrated higher efficiency than hydrogen ions for Cs+ and Co2+, reaching nearly 100% efficiency at a 4 M Na+ concentration. Particularly, with a 4 M hydrochloric acid solution, the desorption efficiency for Cs+ remained at 81%, whereas sodium chloride exhibited a high ion exchange capacity, removing up to 96%, indicating the significant influence of sodium ions' chemical hardness. Therefore, the chemical hardness affects the desorption efficiency, emphasizing the importance of the chemical characteristics of ions, not limited to acid treatment.