摘要：二氧化氯具有强氧化性、不稳定性和消毒性，其氧化能力是次氯酸的9倍多，是氯的2.6倍。本文在制备二氧化氯的基础上，用分光光度法测定反应后印染废水的含量，从而计算二氧化氯对印染废水的脱色率。研究搅拌速度、二氧化氯用量、pH值、反应温度、反应时间、废水初始浓度等对废水的脱色效果。实验结果表明：二氧化氯对印染废水的脱色率在一定条件下能达到80%以上，搅拌速率、废水起始浓度对脱色率影响不大，温度越高废水的脱色效果越好，反应时间也很快，10分钟基本上完全反应，在酸性条件下脱色率较低，但在碱性条件下pH值越大脱色率越高。二氧化氯对废水脱色的较佳条件：反应温度25℃，反应时间20min，转速100r/min，pH=10，二氧化氯与废水反应的配比为1.5。
关键词：印染废水；二氧化氯； 脱色率；分光光度法
Study on Treatment of Printing wastewater
Abstract: Chlorine dioxide has strong property of oxidation, the instability and the disinfection, its oxidized ability is more than 9 times of hypochlorous, and is 2.6 times of chlorine. This article is based on the preparation of chlorine dioxide, the content of the printing wastewater was after reaction determined by spectrophotometric methods, and thus decolourization rate of printing wastewater was calculated with chlorine dioxide. Then the decolourization effect of the printing wastewater by reaction mixing speed, the amount of chlorine dioxide, pH, reaction temperature initial concentration of printing wastewater, reaction time were studied. The experimental result indicated that, the decolourization rate can achieve above 80% by chlorine dioxide under the certain condition. The mixing speed, and initial concentration of the printing wastewater are no influence to the decolourization rate. The higher temperature is, the higher decolourization rate. The reaction is very quick. The reaction would be completed within 10 minutes. Under the alkalinity condition, the larger pH is , the higher decolourization rate is. So the best condition are the followings: reaction temperature is 25℃, reaction time is 20min, rotational speed is 100r/min, pH is 10, the ratio of the printing wastewater and a chlorine dioxide response is 1.5.
Keywords: Printing wastewater; Chlorine dioxide; Decolourization rate; Spectrometric
目 录
中文摘要 I
英文摘要 II
目录 III
1. 绪论 1
1.1 印染废水的特点 1
1.2 印染废水的处理方法 1
1.3 二氧化氯处理印染废水的相关研究 3
1.4 二氧化氯的性质 4
1.5 二氧化氯的制备方法 4
1.6 二氧化氯的脱色机理 4
1.7 二氧化氯应用概况 5
2. 实验部分 6
2.1 主要原料、试剂及仪器 6
2.2 实验步骤 6
3. 实验结果与讨论 9
3.1 标准曲线的绘制 9
3.2 单因素考察 10
3.3 正交设计 15
3.4 正交结果 16
4. 总结与展望 17
致谢 18
参考文献 19
