【作者】 刘旭；

【导师】 郭新超；

【作者基本信息】 西安建筑科技大学 ， 环境工程， 2009， 硕士

【摘要】 我国是纺织印染的第一大国,而纺织印染行业又是工业废水排放的大户,约占整个工业废水排放量的35%。据资料显示,我国印染废水的排放量大约为每天400万m³。印染废水具有废水量大,色度高,成分复杂,水质变化和生物毒性大,难生物降解,且染料抗光解、抗氧化性强等特点,是较难处理的工业废水之一。高级氧化技术是近年来应用到废水处理领域的新技术之一,正成为研究的热点。其中Fenton试剂氧化处理染料废水取得了一定的效果,但单独的Fenton试剂氧化存在一定的缺点,如H₂O₂的利用率不高;投加的亚铁盐较多,易被氧化形成沉淀造成二次污染等。超声波水处理技术是最近几年发展起来的新兴技术,具有降解条件温和、反应速度快和适用范围广等优点,但作为一种新兴技术和边缘学科,目前仍处在基础研究阶段。最近几年国内外部分学者开始研究超声波和其它方法的协同作用,但此类研究仍处在起步阶段。将超声波与传统的水处理技术相结合,很有可能为废水处理技术带来新的活力。论文将超声波与Fenton试剂氧化法结合起来,处理模拟染料废水-甲基橙溶液,研究该组合工艺对甲基橙的降解规律。通过试验研究发现:对于色度的去除Fenton反应40分钟后去除率达到90%以上,而超声和Fenton组合反应10分钟左右色度的去除率就达到了90%,去除率大幅提高。在COD去除方面,单独超声的去除率为9%,单独Fenton去除率为69%,两者组合去除率为83%。叠加效果比单独的超声和单独Fenton的算术之和提高了5%,由此可以看出超声和Fenton有一定的协同作用。协同作用的最佳反应条件:pH为4、原水浓度为100mg/L、Fe²⁺浓度为8mg/L、H₂O₂浓度为400mg/L。磷酸根离子、氯离子对协同反应有抑制作用,而紫外光照条件下对协同反应有很好的促进作用。更多还原

【Abstract】 China is the largest textile printing and dyeing country,and the textile printing and dyeing industry is the major industrial wastewater producer,it is about 35%of all industrial wastewater emissions.The discharge amount of dye waste water reported is approximately 4×10⁶m³/d.Dye waste water is one of the most difficult to treat wastewater,because it has the characteristic as:very large amount,high chromatic, complex component,bigness water quality change and biology toxicity,difficult to degrade,and no easy to oxidation and photolysis and so on.Advanced oxidation technology is a new wastewater treatment technologies which applied to the wastewater treatment in recent years,and it is becoming a hot research.Fenton reagent oxidation of dye wastewater has made some effect,but there are some drawbacks on the Fenton reagent oxidation alone:such as the utilization of hydrogen peroxide is not high;in general plus more ferrous salt to improve the effectiveness of Fenton oxidation reagents,which susceptible oxidation to formation of secondary pollution.The ultrasound technology was the emerging technology which several years developed recently,had the degeneration condition temperate,the faster reaction rate and the applicable scope broad and so on the merits,but the ultrasound as one kind of emerging technology and the edge discipline,still occupied at present the basic research stage.In recent years some scholars at home and abroad have begun to study the methods of ultrasound cooperate with and other methods,but such research is still in the early stage,it is possible bring new vitality for wastewater treatment technologies to combine the ultrasonic treatment with the traditional technology.Papers will research combine the ultrasonic oxidation with Fenton reagent to deal with a simulated dye wastewater of methyl orange in order to study the rule of the degradation processThe study found:the color removal rate is over 90%after Fenton reaction for 40 minutes,while the color removal rate reached 90%with the combination of ultrasound and Fenton in about 10 minutes,greatly accelerated the color wipe off.In COD removal,the individual ultrasonic degradation is the rate of 9,a separate Fenton degradation rate is 69,whichever the effect of combination of 83 percents.We can see that ultrasound can promote the Fenton reaction,and the effects of combination increased 5%than ultrasound and Fenton’s superposition,it can be seen in ultrasound and Fenton have a certain synergy;Getting the best reaction conditions:the pH is 4, the raw water concentration is 100mg/L,Fe²⁺ concentration is 8mg/L,H₂O₂ concentration is 400mg/L.The experiment also showed that phosphate ions,chloride ions inhibit the reaction,while the purple light conditions have a very good role in the system.更多还原