水污染治理技术及原理
王君,潘志军,张朝红,张向东,郭宝东,温福宇,佟键.纳米锐钛型TiO2催化超声降解甲基对硫磷农药的研究[J].环境科学学报,2005,25(6):761-766
纳米锐钛型TiO2催化超声降解甲基对硫磷农药的研究
- Study on ultrasonic degradation of methylparathion pesticide in Presence of nano anatase TiO2 catalyst
- 基金项目：国家自然科学基金项目(No.20371023)
- 作者
- 单位
- 王君
- 辽宁大学化学系, 沈阳 110036
- 潘志军
- 辽宁大学化学系, 沈阳 110036
- 张朝红
- 辽宁大学环境系, 沈阳 110036
- 张向东
- 辽宁大学化学系, 沈阳 110036
- 郭宝东
- 辽宁大学化学系, 沈阳 110036
- 温福宇
- 辽宁大学化学系, 沈阳 110036
- 佟键
- 辽宁大学化学系, 沈阳 110036
- 摘要：采用高温活化处理过的纳米锐钛型TiO2为催化剂,研究了各种因素对有机磷农药的代表性化合物——甲基对硫磷超声降解反应的影响.结果表明,在纳米锐钛型TiO2的作用下,甲基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.在超声波频率40kHz,输出功率50W,催化剂用量1000mg·L-1,pH为5.00,温度为20℃,甲基对硫磷水溶液初始浓度50mg·L-1的条件下,50min时的降解率即可达到95%以上.
- Abstract：A variety of affecting factors on ultrasonic degradation of methylparathion pesticide, a kind of typical organophosphate insecticides, by adopting nano anatase TiO2 catalyst after treatment of high-temperature activation was studied. The results indicated that the effects of ultrasonic degradation were more obvious in the presence of nano anatase TiO2 than in absence of any TiO2. The ultrasonic degradation kinetics of methylparathion pesticide in the presence of nano anatase TiO2 catalyst followed the first-order reaction. The degradation ratio of methylparathion pesticide surpassed 95.0 % within 50 min under the experimental conditions such as ultrasonic frequency of 40 kHz, output power of 50 W, amount of 1000 mg/L TiO2 catalyst, pH of 5.00, and temperature of 20 ℃, when the initial methylparathion pesticide concentration of 50 mg/L
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