STUDIES ON AIR POLLUTION STATUS IN SOLAN CITY OF HIMACHAL PRADESH
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Date
2016
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UHF,NAUNI
Abstract
ABSTRACT The present investigation entitled “Studies on air pollution status in Solan city of Himachal Pradesh” was carried out in Solan city of Himachal Pradesh with the aim to study the different air pollutants in Solan city and to find out the air quality index (AQI). The study was carried out at five selected locations classified as state highway, commercial area, national highway, old bus stand and industrial area during the post monsoon and pre monsoon seasons in the Solan city to monitor pollutants viz. RSPM (PM10), NRSPM, TSP, NO2, SO2 and VOCs. The maximum concentration of particulate matter (PM10) was found at commercial area (122.24 µg per m3) while the minimum concentration was found at state highway (75.18 µg per m3). The maximum concentration of total suspended particulate matter was found at commercial area with a mean value of 367.67 µg per m3 while minimum total suspended particulate matter was found at national highway with a mean concentration of 282.43 µg per m3. The maximum concentration of NO2 was found at commercial area with a mean value of 29.47 µg per m3 while minimum concentration of NO2 was found at state highway with a mean value of 18.19 µg per m3. The maximum concentration of SO2 was found at commercial area with a mean value of 8.25 µg per m3 while minimum concentration of SO2 was found at state highway with a mean value of 3.42 µg per m3. The maximum (6.46 µg per m3) mean concentration of VOCs was measured during premonsoon season and minimum (1.81 µg per m3) mean concentration of volatile organic compounds was measured during post-monsoon season. The correlation of weather parameters (temperature, relative humidity, wind speed and rainfall) with pollutants showed that the temperature has significant negative correlation with all the studied pollutants in post-monsoon season whereas, wind speed showed significant negative correlation with particulate matter (PM10), non-respirable suspended particulate matter (NRSPM) and total suspended particulate (TSP) in the same season. In pre-monsoon season, non significant correlation of meteorological parameters was found with all the studied pollutants. The air quality index during post monsoon and pre monsoon seasons at commercial area, old bus stand and national highway was “Moderately polluted” while at state highway and industrial area it was found to be “Fairly clean”. The investigation found that the maximum concentration of Fe was observed in the city followed by Manganese (Mn) while the concentrations of As, Pb, Ni and Cu was found in less concentration.
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