Document Type : Original Article

Authors

• Maryam Sarkhosh ¹
• Amir Hossein Mahvi ²
• Mohsen Mohseni ³
• Leila Shiry ¹
• Javad Alavi ⁴

¹ Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

² Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Science; Center for Solid Waste Research, Institute for Environmental Research; National Institute of Health Research, Tehran University of Medical Sciences, Tehran, Iran

³ Department of Environmental Health Engineering, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran

⁴ School of Environmental Technology, Motahar Institute of Higher Education, Tehran, Iran

Abstract

Aims: In accordance with the Air Clean Act developed for ozone monitoring, the measurement of volatile organic compounds (VOCs) based on photochemical assessment monitoring stations (PAMS) was carried out. Materials and Methods: Thirteen species of VOCs were measured on Enghelab square in Tehran by PhoCheck PID Detector at morning, noon, and afternoon for 3 months. The data were reported as descriptive statistics. Results: Most of the VOCs species showed diurnal variations with higher concentrations in the noon. The highest concentration of VOCs was aromatic group (AR: 0.549 ± 0.146 ppb). AR was the main contributor to photochemical smog. Conclusion: The majority of the AR class and toluene may be followed by the impacts of heavy traffic and the peak values of VOCs concentrations occurred around mid-day which depends indirectly upon vehicles and emission of evaporations

Keywords

• Air pollution
• photochemical assessment monitoring stations
• vehicles
• volatile organic compounds