【作者】 周静；

【导师】 何瑾馨；

【作者基本信息】 东华大学 ， 应用化学， 2008， 硕士

【摘要】 印染企业在生产过程中产生的印染废水,是纺织印染工业主要污染源。废水若不经治理直接排放,将对地面水体产生严重影响,引起水体中生态系统的破坏和水体腐败。由于这类废水成分相当复杂,往往含有多种有机染料并且毒性强,色度深,pH值波动大,难降解,组分变化大,水量大,所以印染废水是工业废水处理的难点,而开发有效的印染工业废水处理技术是环保行业关注的重要课题。现在对印染废水处理的研究颇为活跃,脱色方法主要有吸附、混凝、氧化还原、离子交换、反渗透、生化等,但对絮凝剂联合矿物粘土处理印染废水的系统性研究较少,对其处理机理的研究就更少。本课题主要针对絮凝剂与凹凸棒粘土(以下简称凹土)联合处理印染废水进行脱色处理研究,考察此种方法对染料废水的脱色效果,以及其对比单独絮凝剂处理的增效效果;通过处理活性染料废水,对实验中各影响因素(染料废水pH值、絮凝剂投加量、凹土焙烧温度、复配比例等因素)及机理进行探讨并确定最佳工艺,最后通过处理酸性及分散染料废水,考察此种复配方法对酸性及分散染料废水的适用性。研究结果表明:聚合硫酸铝铁或硫酸铝与凹土的复配物在适宜条件下对活性染料、分散染料及酸性染料模拟废水均有较好的脱色效果,分散染料和酸性染料模拟废水脱色率可达95%以上,活性染料模拟废水脱色率可接近90%,COD去除率可达75%;较单独使用絮凝剂处理染料废水具有更广的pH使用范围及更好的脱色效果。聚合硫酸铝铁或硫酸铝与凹土复配使用在以活性染料为主的废水中有很高的使用价值,一方面提高了絮凝剂单独处理活性染料废水的脱色率,改善了单独使用絮凝剂处理印染废水中,活性染料废水脱色率及COD去除率不高的情况;另一方面减少了调节pH值所带来的麻烦,且此处理方法具有良好的沉降性能和较快的过滤速度加之粘土矿物价格低廉,同时可以再生利用,因而在处理活性染料为主的印染废水的净化处理方面具有良好的应用前景,且值得推广。更多还原

【Abstract】 The wastewater produced in the printing & dyeing industry is the main pollution source of textile industry.If the wastewater weren’t treated before being discharged, this would affect the ground water seriously.Thus may destroy the ecology balance of water and make water septic.The composition of dyeing effluent is considerable complex.It contains many kinds of organic dyestuff.It has complex characteristic, such as strong toxicity,deep colour,the wide fluctuations,difficult biodegradable,the wide variation of composition with a large quantity of water.So the dyeing wastewater is quite difficult for wastewater treatment.Understanding and developing suitable technology for dyeing effluent treatment is the important task of environmental protection industry.At present the research on dyeing effluent treatment is quite active,the main decolorization methods include adsorption,coagulation,redox,ion exchange,reverse osmosis,biochemistry and so on.However,there is little reserch on the method of using complex of flocculants and clay mineral to deal with the dyeing effluent,and there is even less reserch on the mechanism of this method.In this paper,the study is keen on dealing with the simulated dyeing effluent with the complex of coagulants and attapulgite.The effect of decolorization were studied by using the complex of cagulants and attapulgite to treat simulated disperse,acid and reactive dyeing effluent,as well as the synergistic effect compared the composite with their separate coagulant.The pH value of the effluent,the quantity of coagulants, activation temperature of clay,the ratio of coagulant to clay and other factors affecting color and COD removal rate and their mechanism were also discussed to define the best parameters.Finally,we studied the applicability of the complex method to the other two dyeing effluent by using the complex of cagulant and attapulgite to treat simulated disperse and acid dyeing effluent.The experimental results indicated that a synergistic effect was obtained for the decolorization of the simulated reactive,disperse and acid dyeing effluent by using coagulant Poly Ferric-Aluminous-Sulphate(PFAS) or Aluminum Sulfate(AS)and attapulgite simultaneously under the suitable condition.The decolorization of the simulated disperse and acid dyeing effluent can reach the value of 95%.The decolorization and COD reduction of the simulated reactive dyeing effluent can reach the values of 90%and 75%respectively.The method of using the complex of coagulant(PFAS or AS) and attapulgite have a better color and COD removal rate and wider application range of the pH value of the effluent than using coagulant only.The method of using the complex of coagulant(PFAS or AS) and attapulgite to treat reactive dyeing effluent from printing & dyeing mill has a very high application value.On the one hand,it improves the color and COD removal rate at the situation that the color and COD removal rate of the reactive dyeing effluent is so high.Also it can avoid the pH adjusting for dyeing effluent and has a good settling property performance and faster filtering rate.The clay also has several traits,such as fewness secondary pollution problem,low cost and can be recycled.Thus,this complex method has a good application prospect in the treatment of dyeing wastewater and should be promoted.更多还原