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以Ru/TiZrO2为催化剂,采用催化湿式氧化法降解异佛尔酮废水,选择反应温度、氧气分压、反应时间、催化剂用量、初始pH为影响因素,以TOC去除率为响应值,采用响应面法研究影响因素及其交互作用对响应值的影响,建立二次多项式回归方程模型,并采用后退回归法进行模型精简.结果表明,反应时间和反应温度及其交互作用对TOC去除率影响极显著(P≤0.01);反应时间的二次项对TOC去除率影响显著(P≤0.05).随着反应温度的升高和反应时间的延长,TOC去除率逐渐提高.最后对模型进行验证,实验值与预测值具有很好的一致性,说明模型具有可靠的预测性,将该模型应用到催化湿式氧化中合理可行.质谱和离子色谱检测到异佛尔酮的降解产物主要为有机酮与小分子羧酸,由此提出对反应机理和降解途径的假设.
Degradation of isophorone wastewater by catalytic wet oxidation was carried out using Ru / TiZrO2 as catalyst. The reaction temperature, partial pressure of oxygen, reaction time, amount of catalyst and initial pH were selected as the influential factors. TOC removal rate was used as the response value. Response surface Method to study the impact of influencing factors and their interaction on the response value, establish the quadratic polynomial regression equation model, and regression regression method for model simplification.The results show that the reaction time and reaction temperature and its interaction have a significant impact on the TOC removal rate (P≤0.01). The second term of the reaction time had a significant effect on the removal of TOC (P≤0.05) .The TOC removal rate increased with the increase of the reaction temperature and the reaction time.Finally, the model was verified and the experiment The values and predicted values are in good agreement, indicating that the model is reliable and predictable, and it is reasonable and feasible to apply the model to catalytic wet oxidation.It is found that the degradation products of isophorone are mainly organic ketones and small Molecular carboxylic acids, which put forward hypotheses on the reaction mechanism and degradation pathway.