| 在线分光光度法对Fenton降解活性蓝的降解动力学研究 |
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| 作者单位： | ;1.信阳师范学院化学与化工学院;2.河南科技大学数学与统计学院;3.河南科技大学化工与制药学院 |
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| 摘 要： | 利用在线分光光度法对活性蓝模拟废水的Fenton降解过程进行研究,探讨了过氧化氢浓度、二价铁离子浓度、温度、pH值和活性蓝浓度等因素对活性蓝降解的影响规律.结果表明Fenton降解过程分为两个拟一级动力学过程,反应初期降解速率常数(k1)和反应后期降解速率常数(k2)差约一个数量级.k1与Fe2+初始浓度线性正相关;H_2O_2初始浓度和pH值存在最佳值,分别为3.519 mmol/L和3;提高体系温度能够加快反应达到平衡的时间,反应活化能为25.21 k J/mol.
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| 关 键 词： | Fenton试剂 活性蓝 动力学 降解反应速率常数 |
Fenton Reagent Oxidation and Degradation Reaction Kinetics of Reactive Blue by On-line Spectrophotometry |
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| Affiliation: | ,College of Chemistry and Chemical Engineering,Xinyang Normal University,School of Mathematics and Statisitcs,Henan University of Science and Technology,School of Chemical Engineering and Pharmaceutics,Henan University of Science and Technology |
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| Abstract: | Fenton was employed to treat Reactive Blue( RB) by on-line spectrophotometry. The effects of FeSO_4 concentration、H_2O_2concentration、p H、RB concentration and temperature on the degradation of RB were investigated. The results showed that there were two steps during Fenton oxidize process,and they all followed pseudo first order kinetics. The reaction rates in the( k1) first region and( k_2) second region were difference ten times. Initial FeSO_4 concentration against k1 is linear correlation. The optimum initial H_2O_2 concentration and p H were 3. 519 mmol / L and 3. Reaction equilibrium could be accelerated by improving reaction temperature and the reaction activation energy was 25. 21 k J / mol. |
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| Keywords: | Fenton reagent Reactive Blue kinetics decolorizing reaction rate constant |
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