摘要
采用超声波-TiO2光催化耦合法降解高效氯氰菊酯,考察了高效氯氰菊酯初始浓度、降解时间、溶液pH、催化剂用量等对高效氯氰菊酯农药残留的降解效果,并利用水果进行了实物模拟.结果表明:利用超声波-TiO2光催化耦合法能够有效地降解高效氯氰菊酯农药残留.在弱酸环境中,当纳米TiO2投放量为1.2g/L时,经2h超声催化降解,不同浓度的高效氯氰菊酯农药稀释液均被有效降解,降解率最高可达98.3%.
Ultrasonic irradiation was combined with photocatalysis by TiO2 to degrade highly active cypermethrin. The influences of initial concentration of cypermethrin, degradation time, solution pH and catalyst dosage on the degradation effect of cypermethrin pesticide residues were investigated, and physical simulation was conducted for fruits coated with cypermethrin. Results show that cypermethrin pesticide residues can be effectively degraded through ultrasonic irradiation combined with photocatalysis by TiO2. Namely, cypermethrin pesticide diluents with different concentrations can be effectively degraded after 2 h ultrasonic irradiation in the presence of 1.2 g/L nanoscale TiO2 photocatalyst under weak acidic condition, and the maximum degradation rate is as much as 98.3% .
出处
《化学研究》
CAS
2012年第3期45-49,共5页
Chemical Research
基金
2011年星巴克大学生环保践行者项目
关键词
超声波
TIO2
光催化
高效氯氰菊酯
农药残留
降解
ultrasonic wave
TiO2
photocatalysis
highly active cypermethrin
pesticide residues
degradation
作者简介
祁晓月（1991-），女，学士，研究方向：有机催化．
