电化学技术处理工业废水的可行性研究

时间:2017-02-20 08:14 作者: 点击:次

各类工业生产排出了大量废水,在其排入水体前需要花费大量的资金和时间对其进行处理。环氧氯丙烷废水也不例外。它含有极高的COD浓度(-24,000mg/l)、TOC浓度(-13,500 mg/l)、盐度(NaCl;～22%)和碱度(pH-12),同时含有大量有机物。由于以上原因,如不对其进行有效处理而排放至环境中,必会引起严重的环境污染、威胁人体健康并造成惨重的经济损失。由于常规的处理方法费用过高,处理时间过长并且需要不断进行维护,近二十年来对此类废水的高效处理方法越来越受到重视。本文旨在研究利用不锈钢/钛电极的电化学方法(电氧化、电凝)降解COD和可溶性有机物的可行性。由于电化学方法的处理费用较低、装置简单,因此在近二十年来受到了大量关注,其在处理废水方面的应用也得到了极大地发展。利用该法处理废水的降解率还不是很高。在电压为3.5V、电流为15A且接触时间为20分钟时达到最高降解率(-30%)。可能是由于pH值过高(-12)以及反应装置的局限造成的。与此相比,应用蒸发(水蒸气,103-105℃)等传统的处理方法虽然费用较高,但效果更明显,COD去除率可达90%以上
环氧氯丙烷 废水 电化学 电氧化 电凝
摘要5-6
Abstract6-9
Chapter One Introduction and literature survey9-23
1.1 Introduction9-11
1.2 Manufacturing Trends Abroad and Locally11-17
1.2.1 Manufacturing trends abroad11-15
1.2.2 Manufacturing trends in China15-17
1.3 Origins and characteristics of the wastewater17
1.3.1 Origins of wastewater17
1.3.2 Characteristics of wastewater17
1.4 Risk of epichlorohydrin wastewater17-23
1.4.1 Impact on the environment17-18
1.4.2 Risk on humans18
1.4.3 Current trends of treating wastewater18-23
Chapter Two Electro Oxidation, reaction mechanisms and chemistry23-35
2.1 Literature Survey23
2.2 Electro-Oxidation reaction nature and mechanisms23-26
2.2.1 Electro Oxidation Nature23-25
2.2.2 Electro Oxidation Mechanism25-26
2.3 Electro-Coagulation reaction nature and mechanisms26-30
2.3.1 Electro-Coagulation reaction nature26-28
2.3.2 Electro-Coagulation reaction mechanism28-29
2.3.3 Electro-Coagulation Advantages/Disadvantages29-30
2.4 Examples of Electro-Chemical Applications in wastewater treatment30-35
2.4.1 A combined electrocoagulation-electrooxidation treatment for industrial wastewater30-32
2.4.2 Decontamination of wastewaters containing synthetic organic dyes by electrochemicalmethods32-34
2.4.3 Combined electrooxidation and electrocoagulation processes for the treatment ofmunicipal wastewater34-35
Chapter Three Research Objectives and Methods35-49
3.1 Objectives35
3.2 Materials and methods35-37
3.2.1 Experimental setup35
3.2.2 Experimental apparatus35-36
3.2.3 Experimental reagents36
3.2.4 Experimental Procedures36
3.2.5 Analysis procedures36-37
3.3 Pre-Experiments Section37-41
3.3.1 Trial And Error37-40
3.3.2 Traditional Coagulation40
3.3.3 Electro Coagulation40
3.3.4 Electro Oxidation40-41
3.3.5 Fenton Oxidation41
3.4 Initial Experiments41-47
3.4.1 Fresh water test41-42
3.4.2 Salty water tests42-44
3.4.3 Municipal wastewater test44-45
3.4.4 Simulation of actual wastewater test45-46
3.4.5 Test on Tributyl Phosphate solution46-47
3.5 Conclusions based on the trial experiments47-48