Degradation of Radioactive Ion-Exchange Resin Using H2O2

利用過氧化氫進行放射性離子交換樹脂裂解反應

吳和生(Ho-Shing Wu) ； 吳騰輝(Teng-Hui Wu)

《Journal of the Chinese Institute of Chemical Engineers》 34卷2期 (2003/03) Pp. 263-274

https://doi.org/10.6967/JCICE.200303.0263

摘要

本研究結合過氧化氫與鐵（或銅離子）觸媒進行放射性離子交換樹脂氧化裂解反應，此方法可在短時間內將離子交換樹脂完全裂解產生水和二氧化碳，對有機物的減容有很大的幫助，在研究過程分別探討樹脂固體和溶解液體中有機物之裂解動力學，主要變因有鐵（銅）離子濃度，不同離子交換樹脂種類以及過氧化氫的濃度。利用SEM-EDS的觀察結果瞭解Cu2+和Fe2+的裂解反應途徑，在陰離子交換樹脂的氧化裂解中，額外加入醋酸，其功用除了增加反應速率外，亦可抑制氣泡的形成，另本研究也探討連續程序操作的可行性。

並列摘要

The degradation of radioactive ion-exchange resin (IER) achieved by oxidizing it with hydrogen peroxide in an aqueous medium in the presence of iron (or copper) ion as catalyst was investigated. This method could be used to dissolve waste resins completely to form water and carbon dioxide in a short period of time while minimizing the production of form water and carbon dioxide in a short period of time while minmizung, the proouctlon of organic sludge. The reaction kinetics of the solid resin and organic chemicals were obtained to describe the degradation system. The concentrations of metallic catalysts (Cu2+ and Fe2+), different kinds of IERs and different concentrations of hydrogen peroxide were used to evaluate the optimum reaction conditions for degradation. The reaction paths of Cu2+ and Fe2+ were determined using SEM-EDS. It was found that acetic acid coexists with anionic IER in the oxidative-decomposing system, which leads to a high reaction rate and presents the foam from forming. The performance of a fed-batch process was evaluated for industrial applications.

並列關鍵字

Wet oxidation ； Radioactive ； Ion exchange resin ； Hydrogen peroxide