Studies on atmospheric degradation of diazinon in the EUPHORE simulation chamber

被引：23
作者：
Munoz, Amalia [1 ]
Le Person, Annaig [2 ]
Le Calve, Stephane [3 ]
Mellouki, Abdelwahid [2 ]
Borras, Esther [1 ]
Daele, Veronique [2 ]
Vera, Teresa [1 ]
机构：
[1] Inst Univ CEAM UMH, Valencia 46980, Spain
[2] CNRS ICARE, F-45071 Orleans 2, France
[3] UMR 7515 CNRS UdS, LMSPC, F-67087 Strasbourg 02, France
来源：
CHEMOSPHERE | 2011年 / 85卷 / 05期
关键词：
Air; Kinetics; Diazinon; Photooxidation; Atmospheric fate; Aerosols; GAS-PHASE REACTIONS; HYDROXYL RADICALS; ORGANIC-COMPOUNDS; OH RADICALS; PESTICIDES; (C2H5O)(2)P(S)CH3; (C2H5O)(3)PS; DICHLORVOS; REACTIVITY; PHOTOLYSIS;
D O I：
10.1016/j.chemosphere.2011.06.044
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The gas phase atmospheric degradation of diazinon has been investigated at the large outdoor European Photoreactor (EUPHORE) in Valencia, Spain. The rate constant for reaction of diazinon with OH radicals was measured using a conventional relative rate method with di-n-buthylether as reference compound being k = (3.5 +/- 1.2) x 10(-11) cm(3) molecule(-1) s(-1) at 302 +/- 10 K and atmospheric pressure. The available evidence indicates that tropospheric degradation of diazinon is mainly controlled by reaction with OH radicals, and that the tropospheric lifetime with respect to the OH reaction is estimated to be around 4 h whereas its lifetime with respect to the photolysis is higher than 1 d under our conditions. Significant aerosol formation was observed following the reaction of diazinon with OH radicals, and the main carbon-containing products detected in the particle phase were hydroxydiazinon, hydroxydiazoxon and 2-isopropyl-6-methyl-pyrimidinyl-4-ol. (C) 2011 Elsevier Ltd. All rights reserved.
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页码：724 / 730
页数：7
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