含Ce(Ⅳ)去污工艺产生废液的安全性分析和处理方法

含Ce(Ⅳ)去污工艺是将强氧化剂Ce(Ⅳ)作为去污剂实施去污技术的统称,其为高效的放射性污染金属去污工艺。但其产生的废液存在残留的Ce(Ⅳ)腐蚀处理设备、NH3释放影响环境和人体健康、含有的有机质影响后续处理工艺等问题。本工作结合Ce(Ⅳ)/HNO3、氧化凝胶和氧化泡沫等去污技术,对去污废液安全问题与处理方法进行了初步研究。研究结果表明,通过还原法可去除废液中残留的Ce(Ⅳ)、加热煮沸可有效去除NH3、臭氧氧化处理工艺能显著破坏分解废液中含有的有机质,进而提高去污废液的安全性。

Safety Analysis and Treatment of Liquid Waste Produced by Decontamination Process Using Ce（Ⅳ）

Decontamination process using Ce（Ⅳ） is a general term of technique applying one strong oxidizing agent (Ce（Ⅳ）) to decontamination, which is of high efficiency to decontaminate metals polluted by radionuclide. The liquid waste contains Ce （Ⅳ）, which has the potential risk of corroding equipment, releases NH₃ to endanger environment and human health, and the organics in which affect the following treatment process, and so on. This primary study is on safety  and treatment of liquid waste from decontamination, in connection with such decontamination process as Ce(Ⅳ)/HNO₃, oxidizing gels, oxidizing foam. The result shows Ce（Ⅳ） remains can be eliminated by reduction method, problem of NH₃ release can be solved by heating, and organics can be decomposed by ozone oxidation method, so as to make liquid waste more safe.