Long-term trends of Nitrogen oxides and surface ozone concentrations in Tehran city, 2002–2011

Journal of Environmental Health Science Engineering

Ashraf Mazaheri Tehrani¹  Sajjad Hajiketabi⁶  Vali Sarsangi³  Gholam Reza Mostafaii¹  Davarkhah Rabbani¹  Mohammad Bagher Miranzadeh¹  Mohammad Sadegh Hasanvand⁵  Vahid Kazemi Moghaddam⁴  Mahmood Alimohammadi²  Saeed Motesaddi Zarandi⁷ 

[1] Department of Environmental Health Engineering, School of Public Health, Kashan University of Medical Sciences, Kashan, Iran;Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran;Social Determinants in Health Promotion Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran;Student Research Committee, Sabzevar University of Medical Sciences, Sabzevar, Iran;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;Student Research Committee, Jiroft university of medical science, Jiroft, Iran;Department of Environmental Health Engineering, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran

关键词: Nitrogen oxides;    Long-term trends;    Daily changes;    Tropospheric ozone;   

Others  :  1226927
DOI  :  10.1186/s40201-015-0218-7

 received in 2014-03-11, accepted in 2015-08-25,  发布年份 2015

【 摘 要 】

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 NO ₂ ) 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 NO ₂concentrations are dependent from job shifts and photochemical reactions. Annual mean concentrations of ozone and NO ₂were gradually increased, long-term trend of ozone and NO ₂concentration indicated. The correlation between long term trend of ozone and NO ₂was 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.

【 授权许可】

   
2015 Motesaddi Zarandi et al.

【 图 表 】

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