Spatiotemporal Distribution of PM۱۰ and PM۲.۵ within and Around The City of Arak, Iran: Effect of Natural Sources

In the present study, the concentrations of PM۱۰ and PM۲.۵ were measured within and around the city of Arak from March ۲۰۱۶ through March ۲۰۱۷. The measurements were done every ۱۲ days by means of TSI DustTrak sampler containing specific heads for PM۱۰ and PM۲.۵. The sampling points included eight stations within the city as well as two stations around the city. The average (±SD) values of ۱۰۸.۵۶ ±۵۵.۵۶ and ۴۲.۵۸ ±۱۵.۸۸μg/m۳ were obtained for daily concentrations of PM۱۰ and PM۲.۵, respectively. PM۱۰ showed the maximum concentrations during summer (۱۴۴.۴۷μg/m۳) followed by spring (۱۰۹.۴۴ μg/m۳), autumn (۱۰۰.۹۲μg/m۳), and winter (۷۷.۱۲μg/m۳). On the other hand, the highest values of PM۲.۵ was observed during winter (۴۴.۱۳ μg/m۳) followed by autumn (۴۲.۷۴μg/m۳), summer (۳۷.۵۸μg/m۳) and spring (۳۳.۷۷ μg/m۳). The correlation between PM۱۰ and PM۲.۵ was highest in winter (R۲=۰.۹۲۸۸) followed by spring (R۲=۰.۶۷۲۸), summer (R۲=۰.۶۷۱۳), and autumn (R۲=۰.۵۵۹۲). It was concluded that more than ۵۷ and ۱۹% of the PM۲.۵ and PM۱۰ samples exceeded the Iranian national ambient air quality standards, respectively.

کلیدواژه ها:

PM۱۰ ، PM۲.۵ ، Arak ، Iran ، Air pollution ، Spatiotemporal Distribution