微波强化催化湿式H_2O_2氧化降解喹啉的研究

采用微波强化催化湿式H_2O_2氧化法降解喹啉,以负载型Cu-Ce/γ-Al2O3/TiO_2为催化剂,考察了微波功率、反应温度、H_2O_2投加量和溶液初始p H对降解效果的影响。实验结果表明,在喹啉初始质量浓度为100 mg/L、微波功率为500 W、反应温度为60℃、pH=6、H_2O_2投加量为0.094 mol/L的条件下,反应18 min后,喹啉和TOC去除率分别可达100%、82.18%。微波可明显提高反应速率,反应体系中喹啉降解和H_2O_2分解均符合一级动力学。

Study on microwave-enhanced cataIytic wet peroxide oxidation for the degradation of quinoIine

Microwave-enhanced catalytic wet peroxide oxidation method has been applied to the degradation of quinoline,using immobilized Cu-Ce/γ-Al2O3/TiO2 as catalyst. The influences of microwave power,reaction temper-ature,H2O2 dosage and initial pH on the degradation effect are investigated. The experiment results show that under the following conditions:quinoline initial mass concentration is 100 mg/L,microwave power 500 W,reaction temper-ature 60℃,initial pH=6,and H2O2 dosage 0.094 mol/L,after having reacted for 18 min,the removing rates of quino-line and TOC can reach 100% and 82.18%,respectively. Microwave can significantly improve the reaction rates. Both of the degradation of quinoline and decomposition of H2O2 in the reaction system conform with the first-order kinetics.