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论文编号:HG110 论文字数:12252,页数:25
摘 要：二氧化氯具有强氧化性、不稳定性和消毒性。本文在制备二氧化氯的基础上，用分光光度法测定反应后酸性红染料废水的含量，从而计算二氧化氯对酸性红染料废水的脱色率。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：搅拌速率、废水起始浓度以及反应温度对脱色率影响不大，反应速度很快，10分钟基本上完全反应。在碱性条件下脱色率较低，但在酸碱度达到一定值后对脱色率影响很小。二氧化氯对废水脱色的较佳条件：反应温度30℃，反应时间10min，转速250r/min，pH=6，酸性红染料与二氧化氯反应的摩尔比为1:3.17。通过对实验数据的处理得到二氧化氯与酸性红的反应为一级反应，并得到以下的阿伦尼乌斯方程:k=0.12e-231.11/RT以及动力学方程: r=kcA0.5cB0.5。
关键词：酸性红染料废水；二氧化氯； 脱色率；动力学
Study on Dye’s Decolorization by ClO2
Abstract: Chlorine dioxide has strong property of oxidation, the instability and the disinfection. This article is based on the preparation of chlorine dioxide, the content of the acid red dye wastewater was after reaction determined by spectrophotometric methods, and thus decolourization rate of acid red dye wastewater was calculated with chlorine dioxide. Then the decolourization effect of the dye wastewater by reaction mixing speed, the amount of chlorine dioxide, pH, reaction temperature, initial concentration of dye wastewater, reaction time were studied. The experimental result indicated that, the mixing speed, initial concentration of the dye wastewater and reaction temperature are little influence to the decolourization rate. The reaction is very quick,The reaction would be completed within 10 minutes. Under the alkalinity condition, the larger pH is , the lower decolourization rate is,and the pH is out of scope is little influence to the decolourization rate. So the best condition are the followings: reaction temperature is 30℃, reaction time is 10min, rotational speed is 250r/min, pH is 6, the ratio of the acid red dye wastewater and a chlorine dioxide response is 3.17.To deal with the data of the experiment we get the result: the reaction is first order, and Arrhenius Equation is k=0.12e-231.11/RT, dynamic equation is r=kcA0.5cB0.5.
Keywords: Acid red dye wastewater; Chlorine dioxide; Decolourization rate;
Kinetics
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 ClO2在印染废水中的应用．3
1.4 ClO2的性质．4
1.5 ClO2的制备方法．5
1.6 ClO2的脱色机理．5
1.7 应用概况5
2. 实验试剂与玻璃仪器．7
2.1 主要原料和试剂7
2.2 主要仪器7
2.3 实验步骤7
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 染料与二氧化氯反应的摩尔比推算．16
3.4 动力学计算．16
4. 结论．18
致谢19
参考文献20
