催化氧化降解工业废水的催化剂和工程应用研究

发布时间：2017-12-27 21:30

  本文关键词：催化氧化降解工业废水的催化剂和工程应用研究　出处：《中南民族大学》2015年硕士论文　论文类型：学位论文

  更多相关文章： 高级氧化技术(AOTs) 催化剂 芬顿 臭氧氧化 锰渣 工业废水

【摘要】：如何经济高效的对环境污染的治理是环境保护的一项重大任务。在高级氧化技术中使用性能稳定高效的催化剂可以显著地降低成本和提高效率,因此对催化剂的研究与筛选具有重要的现实意义。基于此本文对利于磁性分离的芬顿催化剂的应用进行了研究。电解锰渣是一种污染严重的固体废弃物,然而锰渣中部分活性成分对臭氧氧化具有催化效果。基于以废治废、资源化利用,本文对电解锰渣制成臭氧催化剂及应用到工业废水的处理进行了研究。本文第一章介绍了工业废水现状、高级氧化技术、电解锰渣的现状,并对本课题的研究目的、意义和内容进行了阐述。第二章阐述了铁掺杂的有序介孔碳(OMC@Fe)、碳包覆四氧化三铁(C@Fe3O4)、磁性氧化石墨烯(MGO)三种磁性碳复合材料的制备,以及利用XRD、TEM、TG等分析检测手段对材料进行了表征。三种磁性碳复合材料对4-CP模拟污染物进行了吸附,结果表明其吸附动力学过程更符合Lagergren准二级动力学模型,吸附等温线更符合Freundlich等温线模型,三种磁性碳复合材料吸附能力由强到弱分别为:C@Fe3O4OMC@FeMGO。同时以酸性橙为模拟污染物,对材料的芬顿反应催化性能进行了研究。在OMC@Fe类芬顿降解酸性橙过程中通过正交实验得出在考察范围内对反应的影响显著性排序从强到弱依次为:pH、H2O2浓度、催化剂浓度。此外,光照在一定程度下可以提高芬顿反应的降解效果,在一定程度内通过升高温度还可以降低pH对反应限制。OMC@Fe作为类芬顿降解酸性橙的催化剂具有较好的稳定性能,且能够循环利用。C@Fe3O4类芬顿降解酸性橙的过程可以进一步证实在一定程度内通过升高温度可以降低pH对反应限制的结论。C@Fe3O4具有磁性,便于材料的回收与重复利用。在第三章中,先以电解锰渣为载体制备出电解锰渣载锰催化剂,再研究其在臭氧催化氧化工艺中对X3B的降解。实验确定在高锰酸钾浓度为0.05 mol·L-1、吸附时间为24h、煅烧温度为400℃的条件下制备出的电解锰渣载锰催化剂在实验考察范围内表现出最高活性。电解锰渣载锰催化剂催化臭氧化较单纯臭氧化污染物X3B具有优势,电解锰渣载锰催化剂具有较好的稳定性能,机理探究发现催化产生的羟基自由基和体系臭氧是去除污染物的活性物种之一。此外,通过对不同反应装置的反应效果进行对比,可以发现柱式反应装置具有更快的反应速度。第四章是关于臭氧催化氧化技术工程实践。该部分对XX化工园污水处理厂现场数据进行了采集与分析,得出该臭氧氧化工艺对废水可生化性的提高具有贡献。结合实际情况通过小试,选出二氧化锰作为催化剂,可明显增强处理效果。
[Abstract]:How to manage the environmental pollution economically and efficiently is a major task of environmental protection. The use of stable and efficient catalysts in advanced oxidation technology can significantly reduce costs and improve efficiency, so it has important practical significance for the research and screening of catalysts. Based on this paper, the application of Fenton catalyst for magnetic separation was studied. The electrolytic manganese slag is a kind of solid waste with serious pollution. However, some active components in the manganese slag have a catalytic effect on ozone oxidation. Based on waste treatment and resource utilization, the ozone catalyst for electrolytic manganese slag and the treatment of industrial waste water are studied in this paper. In the first chapter, the status of industrial wastewater, advanced oxidation technology and the status of electrolytic manganese slag are introduced. The purpose, significance and content of this project are also discussed. The second chapter describes the preparation of iron doped ordered mesoporous carbon (OMC@Fe), carbon coated iron oxide (C@Fe3O4) and magnetic oxide graphene (MGO) three kinds of magnetic carbon composites, and XRD, TEM, TG and other analytical methods to characterize the materials. Three kinds of magnetic carbon composite materials for the adsorption of 4-CP on simulated pollutants, the results showed that the adsorption kinetics accord with the quasi two level dynamic model of Lagergren, the adsorption isotherm is more in line with the Freundlich isotherm model, three kinds of magnetic carbon composites adsorption capacity from strong to weak respectively: C@Fe3O4OMC@FeMGO. At the same time, acid orange was used as a simulated pollutant, and the catalytic performance of Fenton reaction was studied. In the process of OMC@Fe type Fenton degradation of acid orange, the effect of reaction on the reaction was determined by orthogonal test. The order was from strong to weak in order of pH, H2O2 concentration and catalyst concentration. In addition, light can improve the degradation effect of Fenton reaction to a certain extent. In a certain degree, the reaction limit can be reduced by increasing the temperature by increasing the temperature of the Fenton. OMC@Fe as a Fenton like catalyst for the degradation of acid orange has good stability and can be recycled. The process of degradation of Acid Orange by Fenton type C@Fe3O4 can further confirm that in a certain degree, the conclusion that the reaction limit can be reduced by pH can be reduced by increasing the temperature. C@Fe3O4 has magnetic properties, which is convenient for recycling and reuse of materials. In the third chapter, the electrolytic manganese slag as the carrier was used as the carrier to prepare the manganese slag carrying manganese catalyst, and the degradation of X3B in the ozone catalytic oxidation process was studied. Potassium Permanganate in the experiment to determine the concentration of 0.05 mol L-1, adsorption time of electrolytic manganese slag preparation conditions of 24h, calcination temperature of 400 DEG C under the load of manganese catalyst shows the highest activity under the experimental conditions. Electrolytic manganese slag supported manganese catalyst for ozonation is superior to pure ozonization pollutant X3B. Electrolytic manganese slag supported manganese catalyst has better stability. Mechanism research shows that hydroxyl radicals and system ozone are one of the active species to remove pollutants. In addition, through the comparison of the reaction effects of different reaction devices, it is found that the column reactor has a faster reaction speed. The fourth chapter is about the technical engineering practice of ozone catalytic oxidation. In this part, the field data of XX chemical garden sewage treatment plant were collected and analyzed, and it was concluded that the ozone oxidation process could contribute to the improvement of wastewater biodegradability. In combination with the actual situation, manganese dioxide is selected as a catalyst through a small test, which can obviously enhance the treatment effect.
【学位授予单位】：中南民族大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703;O643.36
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本文编号：1343258