Vafa Hamid; Gholamreza Goudarzi; Abdolkazem Neisi; Maryam Dastoorpoor
Abstract
Background: Perfectly clean air cannot be found in nature. It contains a certain abundance of particles, including dust, dirt, soot, smoke, and liquid droplets. Mounting evidence indicates increase in particle concentrations and health effects attributed to them in developing countries. In this work, ...
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Background: Perfectly clean air cannot be found in nature. It contains a certain abundance of particles, including dust, dirt, soot, smoke, and liquid droplets. Mounting evidence indicates increase in particle concentrations and health effects attributed to them in developing countries. In this work, we focused on the determination of number of cardiovascular, respiratory diseases and total death associated with PM2.5 in Karaj city during 2012 to 2015. Material and Methods: The health effects of PM2.5 concentrations in ambient air of Karaj was determined using AirQ+ software. Air pollution data was obtained from the Department of Environmental Protection of this city. To validate the data, WHO criterion was performed. After all, data processed by Excel was given to the model. Results: The annual average PM2.5 concentrations in ambient air of this city during the study was higher than WHO health protective guideline (10 µg m–3). The concentration of pollutant has been reduced during the study period but there is a sudden increase in 2015. In addition, the most attributable proportion was estimated in Karaj in 2012 (59.04% for long-term and 5.86 for short-term effects). PM2.5 exposure has caused 275 and 60 natural deaths due to long-term and short-term exposure in 2012 which is unexpected. Conclusion: Regarding the health effects of PM2.5 in ambient air of Karaj city, the importance of controlling air pollution in this metropolis is becoming increasingly evident.
Elham Asrari; Maryam Paydar
Abstract
Abstract
Background and Purpose: Air pollution problem in metropolitan’s city is made by different sources of pollutants. The proportion of air pollutants’ emissions have been increased in many cities of Iran such as Mashhad. This study aimed to investigate the relationships ...
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Abstract
Background and Purpose: Air pollution problem in metropolitan’s city is made by different sources of pollutants. The proportion of air pollutants’ emissions have been increased in many cities of Iran such as Mashhad. This study aimed to investigate the relationships between the trend of particular matter concentration changes and metrological parameters in the atmosphere of Mashhad.
Materials and Methods: In this descriptive cross - sectional study, data including temperature, sunny hours, precipitation, evaporation, moisture, speed and direction of wind were collected from 11 monitoring stations of air pollutants and Metrologic synoptic stations in Mashhad during 2010-2016. Daily average concentrations of PM10 of PM2.5) were calculated, and then relationships between pollutants and metrological data analyzed by Spss18 software.
Findings: The results showed that the maximum concentrations of particle matter occurred in October and autumn season. Numbers of unhealthy days were increased during the years of 2011-2013, decreased in 2014 - 2015 and increased again in 2016. The variations of PM10 and PM2.5 are significant with season, month and year (P <0.001). PM10 was directly related to temperature and evaporation (r=0.095). Also, there was a reverse relation among humidity and rainfall. A reverse relationship was observed between PM2.5 concentration and minimum temperature, sunny days, rainfall and wind speed; however, it was directly related to wind direction.
Conclusion: According to the obtained results in the autumn and October, the highest concentration of particulate matter was observed. Also, GIS maps showed that eastern and relatively center of Mashhad is more polluted than other areas.
Keywords: Air pollution, Mashhad, PM2.5, PM10, Meteorology data
Mohsen heidari; zoha heidarinejad; Vali Alipour; kavoos dindarloo; Omid Rahmanian; Babak Goodarzi; hasan Mousapour
Abstract
Background: Air pollution and its health effects is a principal challenge in Iran. One of the effective measures to control air quality is to determine the actual amount of pollutants and describe the air quality in comparison with standard conditions. The main objective of this study was to evaluate ...
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Background: Air pollution and its health effects is a principal challenge in Iran. One of the effective measures to control air quality is to determine the actual amount of pollutants and describe the air quality in comparison with standard conditions. The main objective of this study was to evaluate the air quality in Kerman based on Air Quality Index (AQI) and to determine the responsible pollutant in polluted days during April 2015 to March 2016. Materials and Methods: In this cross-sectional study, the air pollutants concentration data were obtained from Kerman environmental protection agency. Then, the AQI values were calculated based on the levels of the criteria pollutants, i.e., CO, NO2, SO2, PM10, PM2.5 and O3. Based on AQI levels, the air quality was classified into six groups including good, moderate, unhealthy for the sensitive people, unhealthy, very unhealthy and dangerous. Results: During the studied year, the air quality in 7%, 60%, 29% and 4% of the days, in which the pollutants concentrations were measured, was in clean condition, healthy conditions, unhealthy conditions for sensitive groups and unhealthy condition, respectively. The best and worst air quality conditions were observed in January (in cold season) and April (in warm season), respectively. PM2.5 was the responsible pollutant for air pollution in Kerman. Conclusion: The results showed that the main responsible pollutant which causes air pollution in Kerman was particulate matter. This situation may be originated from the local and regional dust storms, especially from south-west and Sistan regions. Therefore, the essential actions must be taken to control such pollution and to minimize the community exposure to this pollutant.