کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4452216 1620729 2016 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Role of transition metals with water soluble organic carbon in the formation of secondary organic aerosol and metallo‐organics in PM1 sampled during post monsoon and pre-winter time
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
پیش نمایش صفحه اول مقاله
Role of transition metals with water soluble organic carbon in the formation of secondary organic aerosol and metallo‐organics in PM1 sampled during post monsoon and pre-winter time
چکیده انگلیسی


• Strong correlation between transition metals and WSOC.
• Aqueous phase oxidation and production of SOA.
• Fe and Cu as major transition (Fenton) metals.
• Role of metallo-organics in WSOC oxidation.

The transition metals present in ambient air augments the formation of secondary organic aerosol (SOA) and metallo-organics with subsets of water soluble organic carbon (WSOC) mainly associating with carbonyls, organic acids and their oxidized derivatives in PM1 (particles having aerodynamic diameter<1.0 µm). Airborne submicron particles (PM1) were collected using PM1 sampler during post monsoon periods and pre-winter time (August 26–November 30, 2013). PM1 values varied between 95.58 μg/m3 and 190.62 μg/m3, and average mass concentration was 132.87±27.97 μg/m3. Strong correlation between transition metals (Fe, Mn, Cr and Cu) and WSOC was found (up to R2=0.94) within ambient submicron sampled dataset suggesting alternate oxidation and aging mechanisms. A few samples of post monsoon (August–October, 2013) and pre-winter time (November 2013) were analysed by Liquid Chromatography Mass Spectrometer (LC–MS). Higher values of m/z and oxidized fraction of identified organics were found during post monsoon time period. The presence of metallo-organic compounds (with transition metals possibly chelated to carbonyls and organic acids) and their role in aqueous phase oxidation of organic compounds has been explored in this field-based study.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Aerosol Science - Volume 94, April 2016, Pages 56–69
نویسندگان
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