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Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.38 [2009] >
IJRSP Vol.38(6) [December 2009] >
| Title: | Horizontal gradients of traffic related air pollutants near a major highway in Agra, India |
| Authors: | Sharma, Anshumala
Massey, David D
Taneja, Ajay |
| Keywords: | Horizontal gradient
Air pollutants
Pollutant concentration
Traffic exhaust pollutants |
| Issue Date: | Dec-2009 |
| Publisher: | CSIR |
| PACS No.: | 92.60.Sz |
| Abstract: | In the present study,
horizontal gradients of airborne particles and gases were observed
perpendicular to the national highway (NH-2) in Agra, India. A negative
association was found between distance (from the highway) and ambient
concentrations of pollutants. Gradients suggest that the major impact of
traffic flow on the pollutants concentration lies within 250 m distance. Over
the total measured distance (0-500 m), the maximum percent decrease in
concentrations was observed for total
suspended particulate matter (TSPM), particulate matter with aerodynamic
diameter less than 10 mm (PM10),
sulphur dioxide (SO2), nitrogen dioxide (NO2), ozone (O3)
and carbon monoxide (CO) within 0-250 m distance range.
However, no significant decrease in concentrations of carbon dioxide (CO2)
was obtained. Correlations between all of the pollutants considered in
this study are positive with many of them being highly correlated and
significant, which shows that their sources are almost similar. On comparing
the pollutants concentrations with available standards of Central Pollution
Control Board (CPCB), SO2, CO, NO2 and O3
concentrations were found within the permissible limits, whereas PM10
concentration was found higher. This study generates data which can be
useful for Asian city planners for planning residential colonies so as to cause
minimum exposure to the residents. |
| Page(s): | 338-346 |
| ISSN: | 0975-105X (Online); 0367-8393 (Print) |
| Source: | IJRSP Vol.38(6) [December 2009]
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