| 拟除虫菊酯农药的微波辅助无极汞灯下的降解机理研究 |
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| 引用本文： | 塔娜,王绍伟,张昕,杨晓梅.拟除虫菊酯农药的微波辅助无极汞灯下的降解机理研究[J].四川环境,2012,31(2):16-21. |
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| 作者姓名： | 塔娜 王绍伟 张昕 杨晓梅 |
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| 作者单位： | 1. 内蒙古师范大学化学与环境学院内蒙古自治区绿色催化重点试验室,呼和浩特,010022
2. 内蒙古师范大学化学与环境学院内蒙古自治区绿色催化重点试验室,呼和浩特010022／内蒙古自治区环境工程评估中心,呼和浩特010011 |
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| 基金项目： | 国家自然科学基金项目，内蒙古自治区高等学校科学研究项目 |
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| 摘 要： | 在水溶液中,以微波辅助无极汞灯(Microwave-Assisted Eletrodeless Discharge Mercury Lamp,MW-EDML)降解氯氰菊酯、甲氰菊酯和功夫菊酯等3种拟除虫菊酯农药(Synthetic pyrethroids,SPs),采用固相萃取(Solid Phase Extraction,SPE)富集后,用GC-MS鉴定降解产物,并根据降解产物重点探讨了SPs的降解机理。3种SPs的主要降解产物有6种,其降解途径有:酯键水解、氰基水解、脱羧、醚键断裂、氧化、苯环的羟基化以及与溶剂反应等。实验结果还表明:MW-EDML是个高效、简便的降解SPs类农药手段,可应用于其他有机污染物的降解过程。
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| 关 键 词： | 拟除虫菊酯农药 微波 降解机理 无极汞灯 GC-MS |
Study on Photodegradation Mechanism of Synthetic Pyrethroids under Microwave-Assisted Eletrodeless Discharge Mercury Lamp |
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| TA Na,WANG Shao-wei,ZHANG Xin,YANG Xiao-mei.Study on Photodegradation Mechanism of Synthetic Pyrethroids under Microwave-Assisted Eletrodeless Discharge Mercury Lamp[J].Sichuan Environment,2012,31(2):16-21. |
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| Authors: | TA Na WANG Shao-wei ZHANG Xin YANG Xiao-mei |
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| Institution: | 1. State Key Laboratory of Green Catalyst Institute of Environmental Science, School of Chemistry and Environmental Science, Inner Mongolia Normal University, Huhhot 010022, China; 2. Environment Engineering Assessment Center of Inner Mongolia Autonomous Region, Huhhot 010011, China) |
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| Abstract: | The study applied microwave-assisted electrodeless discharge mercury lamp （MW-EDML）, to degrade γ-cyhalothrin （ γ-CY）, fenpropathrin （FP） and cypemethim （CP） in aqueous solution. The degradation products were enriched by solid phase extraction （SPE） and then identified by gas chromatography-mass spectrometry （GC-MS）. According to identification of six kinds of degradation products, the degradation mechanism of SPs was studied, which include five possible pathways： hydrolysis of ester bonds, hydrolysis of ct-cyano group, decarboxylation, breaking of ether bonds, oxidation, hydroxylation of benzene ring and reaction with solvent. The result showed that MW-EDML is a effective and simple tool for degradation of pyrethreids （SPs） and could be applicable to degrade other organic pollutants in aqueous solution. |
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| Keywords: | Synthetic pyrethroid microwave degradation mechanism eletrodeless discharge mercury lamp GC-MS |
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