تعيين ارتباط غلظت آلاينده هاي استنشاقي (ذرات معلق، ازون و سولفيد هيدروژن)، با ظرفيت هاي ريوي در شهرهاي اراك و خمين

Effect of concentration of air pollutants (PM10, 03 and H2S) on lung capacity in the cities Arak and Khomain, Iran

Background: The present study investigates the effect of different concentrations of air pollutants (PM10, 03. H2S) on the function of lung. Materials & Methods: Arak and Khomain cities were divided into 10 and 5 regions, respectively. A sample of air pollutants (PM10, 03 .H2S) was measured by PSI (pollution standard index) machine randomly from spring to winter. Two random samples consisting of 1069 non-smoker residents of the two cities (522 from Khomain and 547 from Arak) were selected. Regression test mode were used to analyze data. Results: PSI in die cities Arak and Khomain was 101.83±14.54 and 89.17±18.58, respectively. Predicted values of FVC, FEVI, FEF 25-75%, MEF 50%, and PEF in Arak were 10.2%, 11.7%, 35.5%, 30.9%, and 40% abnormal, respectively. These values in Khomain were 8.8%, 11.3%, 35.4%, 33.9%, and 40.6% abnormal, respectively. The concentrations of H2S in both cities were above the standard values. There was no significant relationship between the concentrations of 03, H2S, PM10 and vital capacity. However, there was a considerable correlation between the mean of FEF, FEF 25- 75%, and concentration of 03 at P<0.001 and ^=0.016 level of significance, respectively. In Arak the correlation observed between FVC and concentration of 03 was not significant. In Khomain a negative correlation was observed between VC with H2S and PMI0 on one hand and FVC with H2S and PM10 on the other. Conclusion: The main pollutants in Arak was PM10 and in Khomain were H2S and 03. Measuring these pollutants throughout the year is necessary.