کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4439797 1311033 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanism and kinetic properties for OH-initiated atmospheric degradation of the organophosphorus pesticide diazinon
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
پیش نمایش صفحه اول مقاله
Mechanism and kinetic properties for OH-initiated atmospheric degradation of the organophosphorus pesticide diazinon
چکیده انگلیسی

Diazinon is a member of the organophosphorus class of insecticides. It has been regarded as an important atmospheric pollutant because of its high detection-frequency in the air and potential adverse effects on humans and wildlife. In this paper, the reaction mechanism and possible degradation products for the OH-initiated atmospheric degradation of diazinon were investigated and the rate constants of crucial elementary steps over the temperature range of 180–370 K were predicted. Present results show that OH addition to C4 atom in the pyrimidyl ring, H abstraction from the –CH– moiety as well as OH addition to P atom are the dominant pathways for the reaction of diazinon with OH radicals. The dominant degradation products are diazoxon, SO2, P3, CH3CHO, P4, CH3CO, P14 as well as CH3CHCH3. This work provides a comprehensive investigation of the OH-initiated atmospheric degradation of diazinon and should help to clarify its potential risk to non-targets.


► OH addition to C4 atom is the dominant pathway for OH addition to the pyrimidyl ring.
► H abstraction from the –CH– moiety is the dominant abstraction pathway.
► OH addition to P atom is another dominant pathway.
► The dominant products are diazoxon, SO2, P3, CH3CHO, P4, CH3CO, P14 and CH3CHCH3.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Environment - Volume 45, Issue 18, June 2011, Pages 3141–3148
نویسندگان
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