农业机械学报2012，Vol.43Issue(11)：169-173,179,6.DOI:10.6041/j.issn.1000-1298.2012.11.032
果蔬清洗废水中乐果农药扫频超声波降解工艺优化
Process Optimization of Dimethoate Pesticide Degradation by Ultrasound in Aqueous Solution
摘要
Abstract
Using flat sweeping frequency ultrasonic technology, degradation of dimethoate in aqueous solution under ultrasonic field at different ultrasonic frequencies, fixed/sweeping modes, radiate solution volumes, radiate time were investigated. Radical mechanism under ultrasonic field was studied. The results showed that degradation efficiency at sweeping frequency ultrasound mode was proved to be superior to that at fixed mode, and the efficiency of double ultrasonic plats was better than the simple plat. The better treatment system of ultrasonic degradation operating parameters were frequency 68 kHz, power 80 W (corresponding to the processing volume of 8 L), sweeping period 100 ms, frequency combination of 68 kHz with 68 kHz, radiate time 180 min. Under these conditions, the degradation rate of dimethoate with initial concentration 3 mg/L reached 71% . Mechanism study results indicated that the degradation of dimethoate in aqueous solution by ultrasonic was partly caused by free radical oxidation.关键词
果蔬清洗废水/乐果农药/超声波/降解/扫频/工艺优化Key words
Wastewater from fruit and vegetable cleaning/ Dimethoate pesticide/ Ultrasound/ Degradation/ Sweeping frequency/ Process optimization分类
资源环境引用本文复制引用
马海乐,孙宝胜,何荣海,骆琳,王振斌..果蔬清洗废水中乐果农药扫频超声波降解工艺优化[J].农业机械学报,2012,43(11):169-173,179,6.基金项目
江苏高校优势学科建设工程资助项目 （）
