论文总字数：20270字

摘 要

水作为人类生产生活不可或缺的资源之一，随着人口增长，工业的发展水污染状况日益严重。我国水资源虽然总储量丰富，但人均仍属于全球水资源贫乏的十三个国家之一。因此，对于废水的净化，重复利用显得及其重要。

中国作为纺织大国每年产生数千万吨的纺织印染废水。这类废水具有成分复杂，色度大，浓度高，难降解的特点，传统的一些废水工艺难以进行有效处理。因此需要开发新型的废水工艺。当前，高级氧化技术中的电芬顿技术作为一种降解高浓度有机污染物的高新技术，以其高效，无污染，设备简单的特点进入了人们的研究视野。电芬顿法主要就是利用电化学的方法为芬顿反应源源不断的提供H₂O₂与Fe² ，随芬顿反应的进行，产生具有强氧化性的•OH，然后•OH与有机物发生作用使其降解。

目前，电芬顿体系中H₂O₂的产量并不高，并且H₂O₂的运输，储存存在一些问题。因此，本文尝试利用炭黑-PTFE重新制备气体扩散电极，提高过氧化氢的产量解决电芬顿体系中H₂O₂的产量低的问题。

关键词：污水处理 电芬顿 过氧化氢 气体扩散电极 炭黑-PTFE

Abstract

Water is one of the indispensable resources of human production and life, with the increase of population, the water pollution of industrial development is becoming more and more serious. Although the total reserves of water resources are abundant, the per capita is still one of the 13 countries with a global water scarcity. Therefore, it is important to purify the waste water and reuse it.

As a big textile country, China produces a large number of textile printing and dyeing wastewater each year, these wastewater has complex composition, chroma, high concentration, difficult to degrade the characteristics of traditional wastewater treatment process is difficult to effectively deal with. Therefore, it is necessary to develop new wastewater process. At present, the advanced oxidation technology in the electro-Fenton technology as a degradation of high concentrations of organic pollutants in High-tech, with its high efficiency, non-polluting, simple equipment characteristics into people's research horizons. The electric Fenton method mainly uses the electrochemical method to provide the H₂O₂ and the Fe² with the reaction of Fenton, which produces the •OH with the strong oxidizing effect, and then the •OH and the organic matter degrade.

At present, the production of H₂O₂ in the electro-Fenton system is not high, and there are some problems in the transportation and storage of H₂O₂. Therefore, this paper attempts to use carbon black-PTFE to regenerate hydrogen peroxide gas diffusion electrodes, to solve the problem of low yield of H₂O₂ in the electro-Fenton system.

Key words: Sewage treatment; Electro-Fenton; hydrogen peroxide; gas diffusion electrode; carbon black and PTFE

目录

摘要 I

Abstract II

第一章 引言 1

1.1染料废水概述 1

1.2传统的废水处理方法 1

1.2.1物理法 1

1.2.2化学法 1

1.2.3生化法 2

1.3高级氧化技术 3

1.3.1电芬顿技术 3

1.3.2电芬顿技术的基本原理 4

1.3.3电芬顿系统阴极材料的选择 5

1.4气体扩散电极 6

1.4.1气体扩散电极的类型 6

1.5研究目的及主要内容 7

第二章 炭黑-PTFE气体电极的制备 8

2.1概述 8

2.1.1双室反应器生产H₂O₂的原理 8

2.2实验过程 9

2.2.1实验器材 9

2.2.2实验电极制备步骤 9

2.2.3电生H₂O₂实验步骤 10

2.3实验分析方法 11

第三章 实验结果分析与讨论 13

3.1电极的确定 13

3.1.1煅烧对电极的影响 13

3.1.2支撑体的选择 14

3.1.3催化层炭黑与PTFE的配比 14

3.2参数优化 15

3.2.1施加电流的影响 15

3.2.2 O₂曝气量的影响 16

3.2.3电解液流速的影响 16

3.3本章小结 17

参考文献 18

致谢 21

第一章 引言

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