γ辐照对三烷基氧化膦萃取Fe(Ⅲ)的影响  

Effects of γ irradiation on extraction of Fe(Ⅲ) by trialkylphosphine oxide

作　　者：辛仁轩[1] 陈积扬[1] 梁俊福[1] 宋崇立[1] 

机构地区：[1]清华大学核能技术研究院,北京100084

出　　处：《核技术》2002年第12期1025-1028,共4页Nuclear Techniques

基　　金：国家"九五"科技攻关项目子课题 (96 -A18- 0 2 - 0 2 )

摘　　要：三烷基氧化膦具有优越的锕系元素萃取性能和较高的辐照稳定性。 30 %TRPO -煤油已被用作高放废液 (HAW )处理的萃取剂 ,HAW中常含有大量的Fe(Ⅲ )。研究了辐照 30 %TRPO-煤油溶剂的萃取和反萃取性能。萃取剂吸收剂量为 0 .1× 10 5— 10 .0× 10 5Gy。研究结果表明 ,在吸收剂量 0 .1× 10 5— 1.0× 10 5Gy时γ辐照对萃取分配比没有影响 ,当吸收剂量达到 3.0×10 5Gy时Fe(Ⅲ )的萃取分配比显著增加。试验表明用 0 .The trialkylphosphine oxide (TRPO) presents excellent extraction abilities for the actinides elements and it has a high radiation stability. The 30% TRPO-kerosene was used as extractant for high level active liquid waste (HAW) treatment. Large percentage of Fe(Ⅲ) is of ten included in HAW. In this paper, the effects of iron on extraction and back-extraction have been studied. A number of experimental solutions containing 30% TRPO-kerosene were prepared. The total absorptive dose of organic phase was in the range of 0.1×10 5-10.0×10 5Gy. The results show that the γ radiation had no effect on the distribution ratio when absorptive dose was in the range of 0.1×10 5-1.0×10 5Gy. However, when total dose reached more than 3.0×10 5Gy, the distribution ratio of Fe(Ⅲ) increased remarkably. The study also suggests, that radioactive effect may be eliminated by back-extraction with 0.6mol/L oxalic acid solution.

关 键 词：Fe(Ⅲ) Γ辐照 三烷基氧化膦 萃取 铁(Ⅲ) 高放射性废液 处理 分离 

分 类 号：TL941.1[核科学技术—辐射防护及环境保护]