电气石/H_2O_2体系对亚甲基蓝降解的试验研究

Study on Degradation of Methylene Blue by Tourmaline/H_2O_2 System

利用电气石/H2O2的协同作用,研究了该催化体系对亚甲基蓝溶液的降解及其反应动力学。研究结果表明:电气石/H2O2在中性条件下对亚甲基蓝具有较好的降解作用,降解率可达92%以上,COD去除率大于70%。亚甲基蓝的降解率与电气石投加量、H2O2用量、反应时间和反应温度呈正相关性;COD去除率随反应时间的增加而增加,但两者的增加幅度都逐渐变缓。电气石重复使用对亚甲基蓝的降解率影响不明显。反应动力学结果表明,电气石/H2O2体系降解亚甲基蓝废水的反应为拟一级反应。

The experiment was conducted to study the degradation of methylene blue by tourmaline/H2O2 system. The results showed that, the degradation rate of M B and that of COD reached 92% and 70%, respectively, when pH waS in range of 7.2-7,8. The degradation rate of MB had positive correlation with the tourmaline dosage, hydroxyl radical dosage, reaction time and temperature, the removal rate of COD increased with the reaction time, but the trend became slower than before. Tourmaline can be used repeatedly. Kinetic research indicated that the reaction was pseudo-first order.