Spatial and Temporal Variations of PM10 in Chittagong City
Healthy environment is precondition of good health. Fresh air, pure water and soil are the main component of a healthy environment. Contaminants from different anthropogenic activities and natural sources such as, particulate matter (PM), Oxides of Sulphur (SOx), oxides of Nitrogen (NOx), carbon dioxide (CO2) etc. contaminate and pollute this natural fresh air and threaten human life as well as environment.Every year the morbidity due to Particulate matter (PM) is about 50% of the total premature morbidity because of air pollution. World Health Organization's (WHO) International Agency for Research on Cancer classified it as group 1 human carcinogen. Considering its importance, in most of the country, monitoring of particulate matter has been given priority in assessing air quality monitoring. Analyzing the concentrations of particulate matter measured by high volume air sampler from six sampling sites of the city, differences in the concentrations of PM10 were observed in this study. The monthly mean concentration of PM10 hardly remain within the standards of Bangladesh while, the mean annual average of PM10 at all sampling sites was many times higher than the standard of Bangladesh and WHO. As, the concentration of PM10in Chittagong is not praiseworthy enough and indicate a serious threat to human health, strategic air quality management and monitoring system are recommended in this study.
Keywords - Suspended Particulate matter,high volume air sampler