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1669944 
Journal Article 
Ambient air quality at Port Qasim in Karachi city 
Hashmi, DR; Shaikh, GH; Usmani, TH 
2005 
Yes 
Journal of the Chemical Society of Pakistan
ISSN: 0253-5106 
27 
6 
575-579 
WOS:000237370400003 
The monitoring of ambient air quality along with various metrological parameters was carried out at the site of Port Qasim in Karachi (Pakistan). The study was conducted continuously for seven days and nights. Hourly average concentration of O-3 was found to be 12.01 ppb, SO2 2.42 ppb, CO 0.62 ppm, NO 2.35 ppb, NOx 11.26 ppb and PM10 123.49 mu g/m(3). The maximum concentration of almost all of the pollutants were observed in the early morning period due to the stable atmospheric conditions prevailed during the night, being dispersed during the day due to the phenomena of thermal convection. The results obtained in the study have been discussed with reference to the permissible ambient air pollutant limits, recommended by World Health Organization (WHO).