Poly(methyl methacrylate) as incorporation medium for spent ion-exchange resin. II. Simulated resin
Poly(methyl methacrylate) as incorporation medium for spent ion-exchange resin. II. Simulated resin
复制标题
聚甲基丙烯酸甲酯作为废离子交换树脂的掺入介质。
DOI：
10.1002/app.1983.070280520
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发表时间：
1983
影响因子：
3
通讯作者：
S. Eskander
中科院分区：
文献类型：
--
作者：
N. Ghattas;N. Ikladious;S. Eskander
本研究对废离子交换树脂在聚甲基丙烯酸甲酯 (PMMA) 中的掺入和最终遏制进行了研究。含有 50% 掺入的惰性树脂的 PMMA 测试块以 50 rad/s 的剂量率经受 10/sup 5/-10/sup 7/ rad 的辐射剂量。高辐射剂量损害了最终产品的机械性能。随着离子交换树脂粒径的增大，抗压强度和硬度均降低。 DTA 图显示最终凝固产物在约 400/sup 0/C 时的热不稳定性。对用 Cs-137 和 Ce-144 标记的活性树脂块进行的浸出实验表明，浸出剂溶液中释放的铯活性比铈活性更多。去离子水中 Cs 和 Ce 的累积浸出率均低于地下水。获得的机械、热和浸出数据说明 PMMA 适用于固定低比活度的废离子交换树脂。
The incorporation and final containment of spent ion-exchange resins into poly(methyl methacrylate) (PMMA) was investigated in the present study. Test blocks of PMMA with 50% incorporated inactive resin were subjected to radiation doses of 10/sup 5/-10/sup 7/ rad at a dose rate of 50 rad/s. The high radiation doses impaired the mechanical properties of the final products. Both compressive strength and hardness decreased with increasing the particle size of the ion-exchange resin. DTA diagrams showed the thermal instability of the final solidification product at about 400/sup 0/C. Leaching experiments on incorporated blocks of active resins labelled with Cs-137 and Ce-144 showed that cesium activity was more released in leachant solutions than was cerium activity. Cumulative leaching rates for both Cs and Ce were lower in deionized water than in underground water. The mechanical, thermal, and leaching data obtained illustrate the suitability of PMMA for immobilization of spent ion-exchange resins with low specific activity.