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Title: Measurement of NH<sub>3</sub>, NO, NO<sub>2</sub> 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 NH<sub>3</sub>
Chemiluminescence method
Meteorological parameters
Issue Date: May-2012
Publisher: NISCAIR-CSIR, India
Abstract: This study presents variability and concentration of ambient NH<sub>3</sub>, NO and NO<sub>2</sub> along with particulate matter (PM<sub>10</sub>) at urban sites of Chandigarh and Delhi of IGP of India (Dec 2010 - Mar 2011). Concentration of NH<sub>3</sub> was found as follows: Chandigarh, 0.72 - 22.81 (av 5.17 ± 0.92 μg m<sup>-3</sup>); and Delhi, av 8.54 ± 0.72 μg m<sup>-3</sup>. Concentration of ambient NO (av 13.13 ± 1.50 μg m<sup>-3</sup>) and NO<sub>2</sub> (av 5.92 ± 0.38 μg m<sup>-3</sup>) were recorded over Chandigarh. NH<sub>4</sub> + concentration were found as follows: Chandigarh, 2.60 - 4.39 (av 3.41 ± 0.78 μg m<sup>-3</sup>); and Delhi, 6.61 - 14.6 (av 9.91 ± 3.77 μg m<sup>-3</sup>). Concentration of NH<sub>3</sub> was significantly correlated with NH<sub>4</sub> + at both of the locations (<i>r<sup>2</sup></i>= 0.87 and <i>r<sup>2</sup> </i>= 0.96). NH<sub>3</sub>/ NH<sub>4</sub> + ratios were: Delhi, 0.59 - 1.75 (av 0.86); and Chandigarh, 0.28 - 5.19. A good correlation of SO<sub>4</sub> <sup>2-</sup> and NO<sub>3</sub> <sup>-</sup> with NH<sub>4</sub> <sup>+</sup> 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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