کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8862826 | 1310512 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study of chemical species associated with fine particles and their secondary particle formation at semi-arid region of India
ترجمه فارسی عنوان
بررسی گونه های شیمیایی مرتبط با ذرات ریز و شکل گیری ذرات ثانویه آنها در منطقه نیمه خشک هند
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علم هواشناسی
چکیده انگلیسی
The fine particles (PM2.5) were collected for 24 h from Agra atmosphere and chemically characterized during the one year study period. The average concentration of PM2.5 was 90.21 ± 20.62 μg mâ3 which is higher than NAAQS and WHO annual standards and their seasonal trend was winter > summer > monsoon. Ionic study indicates that cations were dominant in comparison to anions. Seasonally, Fâ, Ca2+ and Mg2+ were higher during summer period and Clâ, NO3â, NH4+ and K+ were higher during monsoon period while SO42â was higher during winter season. The ratios Ca2+/Na+, Mg2+/Na+ and SO42â/Na+ were higher, while Clâ/Na ratio was lower than sea water ratio indicating the incorporation of non marine constituents in aerosols. The observed Clâ/Na+ (average 0.71) deviate considerable from the Sea water ratio suggesting either a fractionation of Clâ or enrichment of Na+ as there was significant deviation from marine sources. Linear correlation was observable between nss-Ca2+ and nss-Mg2+ with HCO3â throughout the annual seasonal cycle (HCO3â: Ca = 0.59, HCO3â: Mg2+ = 0.53) suggesting the origination of these species from soil dust. The calculated conversion ratio of 'S' (CRS) was lower than 'N' (CRN) which suggests that the secondary formation of NO3â aerosol from NO2 was more predominant than SO42â. Trajectory analysis indicates that long range transportation also contributes to PM2.5 mass over the measurement site.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Pollution Research - Volume 7, Issue 6, November 2016, Pages 1110-1118
Journal: Atmospheric Pollution Research - Volume 7, Issue 6, November 2016, Pages 1110-1118
نویسندگان
P.G. Satsangi, A.S. Pipal, K.B. Budhavant, P.S.P. Rao, A. Taneja,