ClO_2对微囊藻毒素(LR)的去除效果和反应特征

Efficiency and reaction character of microcystin-LR removed by chlorine dioxide

研究二氧化氯C lO2对微囊藻毒素MC-LR的去除效果及反应特征,探讨反应影响因素(反应时间、C lO2质量浓度、温度和pH值)对去除率的影响.结果表明,C lO2能够有效地去除水中的微囊藻毒素MC-LR.C lO2对MC-LR的去除率与C lO2投加质量浓度、反应时间成正相关性,其中C lO2质量浓度对去除效果的影响较为明显;反应温度对去除率的影响不显著.同时发现pH值对去除率也有重要影响,当pH值分别为1.25或10.56时,对MC-LR去除率可达99%以上.正交试验的结果也进一步证明了这一点.C lO2与微囊藻毒素的动力学特征符合假一级,反应速率常数为0.494 77×10-3/m in.

Focus on efficiency and reaction character of microcystin - LR removed by ClO2 and discuss the effect of affecting factors of reaction such as reaction time, concentration of ClO2, temperature and pH value on removal efficiency. The result enunciation that ClO2 can removal of microcystin - LR effectively. Efficiency of removel is direct proportion on concentrates of ClO2 and reaction time. And the concentration of ClO2 has an important effect on the efficiency of removal. Temperature can not affect efficiency of removal obviously. Effi-ciency of removel can be more than 99% when the pH value is 1.25 or 10. 56. The pH value is one of the most important factor affecting the efficiency of removal, and the Perpendicular test results can make sure about it. The kinetics of microcystin - LR degradationin by ClO2 follows the pseudo first - order equation. The reaction rate constant is 0. 494 77 × 10^-3min^-1.