纳米金红石型TiO_2催化超声降解对硫磷  

Ultrasonic degradation of parathion pesticide in presence of nanometer rutile Tio_2 catalyst

作　　者：于会文[1] 马腾[2] 张朝红[3] 张向东[2] 姜岳峰[2] 赵刚[2] 张冠[2] 李莹[2] 张鹏[2] 

机构地区：[1]东北大学资源与土木工程学院,沈阳110004 [2]辽宁大学化学系,沈阳110036 [3]辽宁大学环境系,沈阳110036

出　　处：《农药》2006年第7期481-483,493,共4页Agrochemicals

基　　金：国家自然科学基金项目(No.20371023);辽宁省教育厅自然科学基金项目(No.2004C018)

摘　　要：采用高温活化处理过的纳米金红石型TiO2为催化剂,研究了各种因素对有机磷农药对硫磷超声降解反应的影响。结果表明,在纳米金红石型TiO2的作用下,对硫磷的超声降解效果明显优于单纯使用超声的降解。降解过程符合一级动力学反应。在超声波输出功率50W、催化剂用量1000mg/L、pH10.00、温度20℃、对硫磷水溶液初始浓度50mg/L的条件下,120min时的降解率可达90%以上。A variety of affecting factors on ultrasonic degradation of parathion pesticide, a kind of typical organophosphate insecticides, was studied adopting nanometer ruffle TiO2 catalyst after treatment of high-temperature activation. The results indicated that the effects of ultrasonic degradation were more obvious in the presence of nanometer rutile TiO2 than in absence of any TiO2. The ultrasonic degradation kinetics of parathion pesticide in the presence of nanometer rutile TiO2 catalyst follows first-order reaction. The degradation ratio of parathion pesticide excessed 90% within 120 min under the experimental conditions such as ultrasonic output power of 50 W, adding amount of 1000 mg/L TiO2 catalyst, pH = 10.00, temperature of 20℃ and initial oarathion oesticide concentration of 50 mg/L.

关 键 词：对硫磷 超声降解 纳米金红石型TiO2 

分 类 号：X592[环境科学与工程—环境工程]