微酸性电解水对溶液体系中毒死蜱的降解机制及途径分析研究  

Degradation Mechanism and Pathway of Chlorpyrifos by Slightly Acidic Electrolyzed Water in Aqueous System

作　　者：李慧颖[1] 李嘉欣 郝建雄[1] LI Hui-ying;LI Jia-xin;HAO Jian-xiong(College of Bioscience and Enginering,Hebei University of Science and Technology,Shijiazhuang 050018,Hebei,China)

机构地区：[1]河北科技大学生物科学与工程学院,河北石家庄050018

出　　处：《食品研究与开发》2021年第16期23-28,36,共7页Food Research and Development

基　　金：国家自然科学基金青年科学基金项目(31301571);河北省教育厅高等学校科学技术研究项目(QN2017331)。

摘　　要：以有机磷农药毒死蜱标准品溶液体系为研究对象,通过测定微酸性电解水的反应时间和有效氯浓度对毒死蜱降解效果的影响,进而在微酸性电解水对毒死蜱降解的敏感性以及毒死蜱的降解产物等方面进行研究。采用气相色谱-质谱联用法(gas chromatography-mass spectrometry,GC-MS)检测到毒死蜱的直接降解产物氯吡硫磷一氧,在此基础上对毒死蜱在微酸性电解水主要活性成分次氯酸和羟自由基作用下的降解途径进行了分析。结果表明:有效氯浓度大于5 mg/L时,反应时间30 s内,微酸性电解水对毒死蜱的降解率达到99.96%;毒死蜱降解成氯吡硫磷一氧可能是HOCl和·OH共同参与的结果。An organic phosphorus pesticide chlorpyifos standard solution system was investigated in this study by measuring the effect of the reaction time of slightly acidic electrolyzed water and the available chlorine concentration on the degradation effect of chlorpyrifos. Then,the sensitivity of the slightly acidic electrolyzed water to the degradation of chlorpyrifos and the degradation of chlorpyrifos were measured,and the direct degradation product of chlorpyrifos diethyl 3,5,6-trichloro-2-pyridyl ester was detected by gas chromatography-mass spectrometry. The hypothesis degradation pathways of chlorpyrifos under the combined influence of hypochlorous acid and ·OH were also analyzed. The results showed that when the available chlorine concentration was greater than 5 mg/L and the reaction time was 30 s,the degradation rate of chlorpyrifos reached 99.96%. In addition,the degradation of chlorpyrifos into chlorpyrphos-monoxide was possibly the result of the joint participation of HOCl and·OH.

关 键 词：微酸性电解水 毒死蜱 农药残留消除 降解途径 

分 类 号：X592[环境科学与工程—环境工程]