Ion chemistry and source identification of coarse and fine aerosols in an urban area of eastern central India

doi:10.1016/j.atmosres.2009.08.008

Chia Nan University of Pharmacy & Science Institutional Repository > 環境永續暨休閒學院 > 環境工程與科學系(所) > 期刊論文 > Item 310902800/25329

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標題:	Ion chemistry and source identification of coarse and fine aerosols in an urban area of eastern central India
作者:	Santosh K. Verma Manas K. Deb Yukio Suzuki Ying I. Tsai
貢獻者:	環境工程與科學系
關鍵字:	Water soluble ions Molecular composition Seasonal distribution Sourceidentification Meteorological factors
日期:	2010-01
上傳時間:	2012-05-31 09:57:42 (UTC+8)
摘要:	This work focuses on size segregated atmospheric aerosol mass concentrations and water soluble inorganic components in Chhattisgarh, the easterncentralIndia. Investigation on the monitoring of ambient air levels of atmospheric particulates were done around a large sourceof primary anthropogenic particulate emissions: the industrial areaand coal based power plants. Chemical characterization was carried out for aerosol samples collected inurbanarea, Raipur, (21°14′N, 81°38′E) of Chhattisgarh region over a period of one year, using cascade impactor. Annual mean of mass concentration for coarse (PM2.5–10) andfine (PM2.5) aerosols were monitored to be 238.1 ± 89.9 and 167.0 ± 75.3 µg m− 3 respectively This work deals with the seasonal variation and meteorological influences of inorganic components of the aerosols viz. NO3−, Cl−and SO42−, Mg2+, Na+, K+, Ca2+and NH4+. The annual mean concentration of the inorganic components were monitored to be 3.8 ± 2.5, 8.9 ± 2.7, 10.2 ± 1.5, 2.6 ± 0.6, 8.7 ± 7.2, 4.6 ± 1.8, 16.4 ± 6.9 and 0.4 ± 0.5 µg m− 3 respectively incoarse particles and 8.2 ± 7.1, 6.8 ± 3.6, 46.5 ± 32.8, 1.7 ± 0.6, 7.4 ± 3.6, 5.9 ± 3.4, 10.2 ± 2.9, and 8.8 ± 7.7 µg m− 3 respectively infine particles, for the above ions. The average distribution of nitrate and sulphate in PM2.5–10 were found to be 1.6 and 4.2% andin PM2.5 were 4.9 and 27.9% respectively indicating the dominance of sulphate in both PM2.5–10and PM2.5 particles. Here, industrial emission plays important role for contribution of PM2.5 particle loading in the atmosphere. The cation–anion rational analysis indicated that the PM2.5–10 particles were mostly neutralized and PM2.5 particle were acidic. The major ions were mainly in the form of NaCl > CaSO4 > K2SO4 > MgSO4 > KCl > NH4Cl > Ca(NO3)2 > KNO3 > MgCl2 > Mg(NO3)2 > NH4NO3 > (NH4)2SO4incoarseaerosol particles and (NH4)2SO4 > K2SO4 > CaSO4 > NaCl > NH4NO3 > CaCl2 > KNO3 > MgCl2 > Ca(NO3)2 > KCl > NH4Cl infine particles.
關聯:	Atmospheric Research 95(1)：p.65-76
显示于类别:	[環境工程與科學系(所)] 期刊論文

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