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Title: Measurement of NH3, NO, NO2 and related particulates at urban sites of Indo Gangetic Plain (IGP) of India
Authors: Sharma, S K
Saxena, M
Saud, T
Korpole, S
Mandal, T K
Keywords: Ambient NH3
Chemiluminescence method
Meteorological parameters
Issue Date: May-2012
Publisher: NISCAIR-CSIR, India
Abstract: This study presents variability and concentration of ambient NH3, NO and NO2 along with particulate matter (PM10) at urban sites of Chandigarh and Delhi of IGP of India (Dec 2010 - Mar 2011). Concentration of NH3 was found as follows: Chandigarh, 0.72 - 22.81 (av 5.17 ± 0.92 μg m-3); and Delhi, av 8.54 ± 0.72 μg m-3. Concentration of ambient NO (av 13.13 ± 1.50 μg m-3) and NO2 (av 5.92 ± 0.38 μg m-3) were recorded over Chandigarh. NH4 + concentration were found as follows: Chandigarh, 2.60 - 4.39 (av 3.41 ± 0.78 μg m-3); and Delhi, 6.61 - 14.6 (av 9.91 ± 3.77 μg m-3). Concentration of NH3 was significantly correlated with NH4 + at both of the locations (r2= 0.87 and r2 = 0.96). NH3/ NH4 + ratios were: Delhi, 0.59 - 1.75 (av 0.86); and Chandigarh, 0.28 - 5.19. A good correlation of SO4 2- and NO3 - with NH4 + over Delhi indicates formation of aerosol. Similar correlations were recorded over Chandigarh.
Description: 360-362
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Appears in Collections:JSIR Vol.71(05) [May 2012]

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