金红石型TiO_2催化超声降解甲基对硫磷农药的研究  

Sonacatalytic degradation of methyl parathion pesticide in the presence of rutile TiO_2 catalyst

作　　者：王君[1,2] 张立群[2] 刘彬[2] 吕艳辉[1] 李嘉[1] 李成武[1] 李莹[1] 

机构地区：[1]辽宁大学化学院,沈阳110036 [2]辽宁大学药学院,沈阳110036

出　　处：《哈尔滨工业大学学报》2009年第3期172-174,共3页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(20371023);辽宁省教育厅自然科学基金资助项目(2004C018)

摘　　要：采用高温活化处理过的金红石型TiO2为催化剂,研究了各种因素对甲基对硫磷的超声降解反应的影响.结果表明:在金红石型TiO2作用下,甲基对硫磷的超声降解效果明显优于单纯超声降解.降解动力学符合一级反应.在超声波频率40 kHz,输出功率50 W,催化剂用量1 000 mg.L-1,pH=5.00,温度为20℃,甲基对硫磷溶液初始浓度50.0 mg.L-1的条件下,60 min左右降解率即可达到95%以上.A variety of affecting factors on ultrasonic degradation of methyl parathion were studied adopting the ordinary rutile TiO2 after being activated at high temperature. The results indicate that the effects of ultrasonic degradation are more obvious in the presence of rutile TiO2 than those under the one fold ultrasound. The ultrasonic degradation kinetics of methyl parathion in the presence of rutile TiO2 catalyst follows first-order reaction. The degradation ratio of methyl parathion surpasses 95% within 60 min under the experimental conditions as follows： ultrasonic frequency of 40 kHz, output power of 50 W, catalyst amount of 1 000 mg·L^-1, pH of 5.00, temperature of 20 ℃ and initial methyl parathion concentration of 50. 0 mg·L^-1.

关 键 词：甲基对硫磷 超声降解 金红石型TIO2 

分 类 号：O611.4[理学—无机化学]