Sonochemical degradation of organophosphorus pesticide in dilute aqueous solutions环境科学学报：英文版论文

Sonochemical degradation of organophosphorus pesticide in dilute aqueous solutions环境科学学报：英文版论文

【题名】：Sonochemical degradation of organophosphorus pesticide in dilute aqueous solutions环境科学学报：英文版论文(Sonochemical degradation of organophosphorus pesticide in dilute aqueous solutionsHuanJingKeXueXueBao：YingWenBanLunWen)
【关键词】：有机磷杀虫剂超声波照射水解 pH值水体污染污染治理
【keywords】：YouJiLinShaChongJi ChaoShengBoZhaoShe ShuiJie pHZhi ShuiTiWuRan WuRanZhiLi
【作者】：RobinaFarooq,LINFeng-kai,S.F.Shaukat:,HUANGJian-jun,      【来源】：知识词典
【期刊名称】：环境科学学报：英文版(HuanJingKeXueXueBao：YingWenBan)
【国际标准刊号】：1001-0742        【国内统一刊号】：11-2629
【作者单位】：[1]CollegeofResourcesandEnvironmentalEngineering,EastChinaUniversityofS&T,Shanghai200237,China [2]DepartmentofPhysics,GovernmentCollege,Lahore.Pakistan([1]CollegeofResourcesandEnvironmentalEngineering,EastChinaUniversityofS&T,Shanghai200237,China [2]DepartmentofPhysics,GovernmentCollege,Lahore.Pakistan)
【分类号】：X52      【页码】：-710-714      【出版年】：2003.5
        Ultrasonic irradiation was found to accelerate the rate of hydrolysis of omethoate in aqueous solution over the pH range of 2—12. Process parameters studied include pH, steady-state temperature, concentration, and the type of gases, Greater than 96% hydrolysis was observed in 30 minutes through this process and the rate of destruction increased with the help of more soluble and low thermal inert gas. So with Krypton, omethoate was found to undergo rapid destruction as compared with Argon. In the presence of ultrasound, the observed first-order rate of hydrolysis of omethoate is found to be independent of pH. The formation of transient supercritical water(SCW) appears to be an important factor in the acceleration of chemical reactions in the presence of ultrasound. A detaiied chemical reaction mechanism for omethoatedestruction in water was formulated. Experimental results and theoretical kinetic mechanism demonstrated that the most of the omethoate undergo destruction inside the cavitating holes. A very less effect of temperature on the degradation of omethoate within a temperature range of 20——70℃ proves that a small quantity of omethoate undergoes secondary destruction in the bulk liquid.

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