Author/Authors :
Motesaddi Zarandi، Saeed نويسنده Department of Environmental Health Engineering, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran , , Alimohammadi، Mahmood نويسنده Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran , , Kazemi Moghaddam، Vahid نويسنده Department of Environmental Health Engineering, School of Public Health, Kashan University of Medical Sciences, Kashan, Iran. , , Hasanvand، Mohammad Sadegh نويسنده Department of Environmental Health Engineering, School of Public Health and Air Pollution Research Center, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran , , Miranzadeh، Mohammad Bagher نويسنده Department of Environmental Health Engineering, School of Public Health, Kashan University of Medical Sciences, Kashan, Iran , , Rabbani، Davarkhah نويسنده Department of Environmental Health Engineering, School of Public Health, Kashan University of Medical Sciences, Kashan, Iran , , Mostafaii، Gholam Reza نويسنده Department of Environmental Health Engineering, School of Public Health, Kashan University of Medical Sciences, Kashan, Iran , , Sarsangi، Vali نويسنده Social Determinants in Health Promotion Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran , , Hajiketabi، Sajjad نويسنده Student Research Committee, Jiroft university of medical science, Jiroft, Iran , , Mazaheri Tehrani، Ashraf نويسنده Department of Environmental Health Engineering, School of Public Health, Kashan University of Medical Sciences, Kashan, Iran ,
Abstract :
Background and aim: Tropospheric ozone is a problem with multi aspects - hazard to human health, plant, and
welfare and a key factor to climate change, air pollution and atmosphere chemistry, as well. Behavior of ozone and
nitrogen oxides (NO, and NO2) concentration is highly complex and variable; therefore, their trends as short and
long-term were significantly attended. Most of the studies were carried out on the behavior of pollutant
concentrations in North America, Europe, and East Asia, but few studies have been conducted in west Asia. The aim
of this study was to assess daily changes and long-term trend of ozone and nitrogen oxides concentrations in
Tehran city, Iran from March 2002 to September 2011.
Material and methods: Data were collected from 18 air quality monitoring stations. The data were sorted as daily
mean of 10 years (daily changes) and annual mean for each year (long-term trend). One-sample test was used to
assess the statistical significance.
Results: Current findings indicated that changes of ozone, NO, and NO2 concentrations are dependent from job
shifts and photochemical reactions. Annual mean concentrations of ozone and NO2 were gradually increased,
long-term trend of ozone and NO2 concentration indicated. The correlation between long term trend of ozone and
NO2 was significant (p < 0.05).
Conclusion: The controlling program was the most important factor in long-term concentration of ozone, and
nitrogen oxides, but some problems and difficulties were accounted to perform controlling program.
