Mn-Ce@FA催化剂处理催化湿式氧化医药废水应用

Application of Mn-Ce@FA Catalyst in Catalytic Wet Oxidation Treatment of Pharmaceutical Wastewater

该研究制备了粉煤灰基Mn-Ce@FA催化剂,利用现代分析手段对材料的矿物相、微观形貌与成分、官能团组成等进行分析,将其应用到催化湿式氧化处理医药废水,研究催化剂量、反应温度、反应时间等对其处理效果的影响,并采用动力学方程对其反应过程进行拟合。结果表明:合成材料具有较大的比表面积,Mn和Ce元素被成功负载在粉煤灰载体材料上,该材料具有较好的热稳定性。湿式氧化对医药废水去除效果有限,Mn-Ce@FA催化剂的加入可显著提高污染物去除效率。随着催化剂量增加、反应温度提高与反应时间延长,催化湿式氧化对医药废水TOC与COD去除率逐渐提高。与二级动力学方程拟合结果相比,一级动力学方程对2个体系处理医药废水的结果拟合程度较高。

The fly ash-based Mn-Ce@FA catalyst was prepared in this study. The mineral phase, micro-morphology and composition, and functional group of catalytic material were analyzed through modern analytical methods. The catalyst was applied to catalytic wet air oxidation treatment of pharmaceutical wastewater. The influence of the amount of catalyst, reaction temperature, and reaction time on the treatment effect of catalytic wet air oxidation was investigated, and the reaction results were fitted using kinetic equations. The results showed that, the composite material had a large specific surface area, Mn and Ce elements are successfully loaded on the fly ash support material, and the material had a good thermal stability. The ability of wet air oxidation on the removal effect of pharmaceutical wastewater was limited, and the addition of Mn-Ce@FA catalyst could significantly increase the efficiency of pollutant removal. Furthermore, with the increase of the amount of catalyst, the enhancement of reaction temperature and the prolongation of reaction time, the removal rate of TOC and COD from pharmaceutical wastewater were gradually increased by catalytic wet oxidation. Compared to the fitting results of the second-order kinetic equation, the first-order kinetic equation had a higher degree of fitting to the results of the two systems for the treatment of pharmaceutical wastewater.