放射性废离子交换树脂的过氧化氢湿法催化氧化技术研究

A STUDY ON WET CATALYSIS OXIDATION OF SPENT RADIOACTIVE ION-EXCHANGE RESIN BY HYDROGEN PEROXIDE

放射性废离子交换树脂是核设施产生的主要中低放废物之一。本文研究了阳、阴及混合树脂在Ｈ＿２Ｏ＿２－Ｎｉ￣（２＋）／Ｃｕ￣（２＋）和Ｈ＿２Ｏ＿２－Ｍｎ￣（２＋）／Ｃｕ￣（２＋）及Ｈ＿２Ｏ＿２－Ｆｅ￣（２＋）／Ｃｕ￣（２＋）和Ｈ＿２Ｏ＿２－Ｃｕ￣（２＋）体系中的氧化分解行为，分析了过氧化氢用量、金属离子催化剂、温度、ｐＨ、ＮａＯＨ用量等对反应进程和结果的影响，研究了水泥固化效果与分解残余物量之间的关系，找出了不影响水泥固化的分解残液ＣＯＤ上限值，并对树脂过氧化氢湿法催化氧化的机理进行了初步探讨。通过对废树脂的过氧化氢湿法催化氧化工艺的进一步探索和改进，为今后台架实验提供工艺参数和设备设计依据。

Spent radioactive ion-exchange resin (IER)is one of the main kinds of wastesproduced by nuclear installions. This paper describex the study on decomposition behaviors ofcationic,anionic and mixed IER in H_2O_2-Ni￣(2+)/Cu￣(2+),H_2O_2-Mn￣(2)/Cu￣(2+),H_2O_2-Fe￣(2+)/Cu￣(2+) andH_2O_2-Cu￣(2+) systems,analyzes the effects on reaction process and consequence of many factorsstich as amount of H_2O_2,catalyst,temperature,pH-value, NaOH and so on. The relation be-tween cementation process and the amount of decomposition residuals was studied. It provid-ed the possible maximum COD-value under which the solidification process would not be affected.The reaction mechnism of the wet chemical oxidation of IER was discussed preliminarlly.