H_2O_2-Fe^(2+)/TiO_2-H_2SO_4处理废有机溶剂的研究  

An Experimental Study on Treatment of Spent Organic Solvent (TBP/OK) by H_2O_2-Fe^2+/TiO_2-H_2SO_4

作　　者：冀小元[1] 云桂春[1] 

机构地区：[1]清华大学核能技术设计研究院环境技术研究室,北京100084

出　　处：《污染防治技术》1996年第1期15-20,共6页Pollution Control Technology

摘　　要：放射性废有机溶剂是核设施产生的中低放废液,研究了废有机溶剂(TBP/OK)在H_2O_2-Fe^(2+)/TiO_2体系中的氧化分解行为,分析了H_2O_2、催化剂(Fe^(2+)/TiO_2)、温度、pH值等因素对反应进程和效果的影响,还对主控因素进行四因素三水平的正交实验,最终确定了废有机溶剂氧化分解的适宜工艺条件。在此基础上进行的“热实验”表明,废有机溶剂氧化分解后其所携放射性核素主要富集在分解残液中,基本没有二次转移或扩散,从而证实了该氧化分解工艺的适宜性和安全性。此外,还对TiO_2对Fe^(2+)的协同催化作用作了探索性的研究。Spent Organic Solvent (SOS). TBP/OK is one o{ the low and intermediate level liquid radioactive wastes generated in nuclear facilities. This paper studies the decomposition behavior of SOS in H2O2-Fe2+ /TiO2-H2SO4, systems and analyzes the effects of such factors as H2O2 concentration, catalysts, temperature and pH on the reaction process and takes the ortho-experiments in 4 factors -3 levels and finally determines the proper conditions of SOS decomposition by wet oxidation reaction. The 'hot test' performed on the basis of experiments demonstrate that, after the wet oxidation decomposition, the radioactive nuclides loaded on SOS are predominantly enriched in the reaction residues without diffusion to other phases, therefore, the suitability and safety of the process are well verified. The reaction mechanism of the chemical oxidation by H2O2 under the action of synergetic catalysis of Fe2+/TiO2 was discusses briefly.

关 键 词：放射性 废有机溶剂 湿法化学氧化 协同催化 

分 类 号：X591[环境科学与工程—环境工程]