节点文献

低温放电等离子体在水处理中的应用

The Application of Discharge Plasma in Water Treatment

【作者】 刘永军

【导师】 高锦章; 杨武;

【作者基本信息】 西北师范大学 , 分析化学, 2004, 硕士

【摘要】 低温等离子体水处理技术是近20年兴起的新型水处理高级氧化技术。因其处理效率高、操作简便、与环境兼容等优点引起了研究者的广泛关注。它能在常温常压下,通过放电反应直接或间接产生羟基自由基,紫外线和高能冲击波,从而有效降解难生化降解的污染物。我们应用辉光放电电解等离子体技术对水溶液中苯酚类物质进行降解,研究了其中间产物和动力学规律。 论文由六章组成: 第一章 介绍了等离子体的概念,讨论了应用等离子体降解水中有机有毒物质的原理,并对就放电等离子体水处理的几种典型工艺及原理及其发展趋势作一介绍。 第二章 以邻氯苯酚溶液模拟废水,采用接触辉光放电产生的等离子体对其进行了降解研究。考察了浓度、电压、pH值、催化剂等外界条件对降解速率的影响,并探讨了降解机理。 第三章 以菲的水溶液为模拟多环芳烃废水,采用接触辉光放电产生的等离子体对其进行了降解研究。考察了浓度、电压、pH值、催化剂等外界条件对降解速率的影响,并探讨了降解机理。 第四章 通过实验,我们对传统的接触辉光放电等离子体反应器进行了改进,以苯酚为模拟废水,从放电的稳定性,降解效果等方面评价了改进效果,并研究了降解动力学规律和降解机理。 第五章 研究了对硝基甲苯在改进型的等离子体装置中的降解行为,重点探讨了对硝基甲苯降解机理。 第六章 总结了接触辉光放电等离子体水处理技术的特点与水处理过程中的共同点。

【Abstract】 Plasma processes are among the emerging technologies for water treatment that were originated from the early 1980’s. They have received extensive attentions of the researchers both home and abroad because of their high degradation efficiency, instrumental simplicity, and amenability to the environment. They can produce the powerful oxidizing free radicals to degrade the organic compounds and kill bacteria or virus in water through discharge under ordinary conditions.This paper includes six chapters:The chapter 1 reviews the application of low temperature discharge plasma technology in the treatment of water.Chapter 2 describes the degradation of o-chlorophenol by plasma in a contact glow discharge electrolysis reactor, and also the influence of the initial concentration, pH on the reaction kinetics.Chapter 3 provides the degradation of phenanthrene by plasma with contact glow discharge electrolysis, and discusses the influence of the initial concentration, pH and different mediums of phenanthrene on the reaction kinetic was investigated.Chapter 4 demonstrates a modified contact glow discharge electrolysis reactor and evaluates the modification in various aspects.Chapter 5 further studies the degradation of 4-Nitrotoluene by plasma with direct glow discharge electrolysis, and the influence of the initial concentration, pH on the reaction kinetic was investigated, focusing the mechanistic aspects.Chapter 6 summarizes the characteristics of CGDE and the common points in the degradation of organic compounds in water.

  • 【分类号】X703
  • 【被引频次】17
  • 【下载频次】1204
节点文献中: 

本文链接的文献网络图示:

本文的引文网络