| 一种改进的高级氧化工艺降解微囊藻毒素动力学模型 |
| 摘要点击 1526 全文点击 1307 投稿时间：2008-05-27 修订日期：2008-08-18 |
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| 中文关键词 UV/H2Ｏ2 臭氧 MCLR 动力学 模型 |
| 英文关键词 UV/H2Ｏ2 ozone MCLR kinetics model |
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| 中文摘要 |
| 试验利用UV/H2Ｏ2和臭氧2种高级氧化工艺降解太湖水中粗提取的微囊藻毒素，研究了光强、初始藻毒素浓度、H2Ｏ2投加量、臭氧投加量、pH值及阴离子对其去除率的影响，并探讨了包括pH,碳酸根浓度等水质参数在反应过程中的变化情况.在准一级反应动力学的基础上提出了一种简捷的适合实际水质的高级氧化技术降解数学模型.结果表明，UV/H2Ｏ2（包括单独UV）体系中，准一级动力学和准二级动力学相关系数R2 的平均值分别为0.927和0.827；在臭氧工艺中，准一级和准二级动力学相关系数R2 的平均值分别为0.911和0.925；而采用改进的一级动力学模型拟合的精确性有较大提高，UV/H2Ｏ2（包括单独UV）和臭氧2种体系中拟合相关系数R2 的平均值分别提高到0.982和0.985；而且通过模型分析还可以得出：在光强、双氧水浓度和臭氧浓度不变的情况下，pH值和碳酸根（碳酸氢根）离子浓度是影响反应最大的因素. |
| 英文摘要 |
| Primary extracted MCLR (Microcystin-LR) from Taihu Lake degradation by UV/H2Ｏ2 and ozone process were investigated. The effects of intensity of UV radiation, initial concentration of MCLR, dosages of H2Ｏ2 and ozone, initial pH value of the solution and anions on degradation of MCLR were studied. The pH value and carbonate (or bicarbonate) concentration varieties during the reaction were discussed. A concise model based on the first order model was raised. The results reveal that in UV/H2Ｏ2 system(including UV alone), the average value of the pseudo first and second order kinetics correlation coefficient R2 are 0.927 and 0.827 respectively. In the ozone treatment process, the average valve of the first and second order kinetic correlation coefficient R2 are 0.911 and 0.925 respectively; at the same time, the accuracy of modified model was proved to be better, the average value of R2 in UV/H2Ｏ2 (including UV alone)and ozone system are up to 0.982 and 0.985 respectively. Meanwhile, it can be concluded from the model that: when the initial UV radiation, H2Ｏ2 dosage and the ozone dosage were set, pH value and carbonate (or bicarbonate) concentrations were the two main aspects which influenced the reaction rate. |
