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Temporal Variations of Atmospheric Benzene and Its Health Effects in Tehran Megacity (2010-2013) Publisher Pubmed



Jafari AJ1 ; Faridi S2 ; Momeniha F1, 3
Authors
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Authors Affiliations
  1. 1. Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
  2. 2. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Student Research Committee, Faculty of Public Health Branch, Iran University of Medical Sciences, Tehran, Iran

Source: Environmental Science and Pollution Research Published:2019


Abstract

The main aims of the present research were (1) investigation of the temporal trends of atmospheric benzene concentrations in Tehran city during the period 2010 to 2013 and (2) assessment of carcinogenic and non-carcinogenic health risks of inhalation exposure to benzene. For the first objective, the data of ambient air benzene concentrations were derived from 15 air quality monitoring stations (AQMSs) in Tehran during the years 2010 to 2013 and they were temporally investigated after data cleaning and missing data imputation. The excess lifetime cancer risk (ELCR) and hazard quotient (HQ) were estimated to reveal the carcinogenic and non-carcinogenic health effects of exposure to ambient benzene. Our findings indicated that over 2010–2013, annual mean concentrations of benzene were in the range of 1.84 to 2.57 μg m−3, and the highest annual mean concentration was observed in 2011 with a mean of 2.57 μg m−3. The four-year average concentration of benzene during the period from 2010 to 2013 was 2.14 μg m−3. Furthermore, the HQ for inhalation exposure to ambient benzene was lower than the acceptable risk level (HQ < 1) over the study time period which indicated that the non-carcinogenic effects are very unlikely to happen. In addition, health risk assessment for ELCR showed that the potential cancer risk for inhalation exposure to benzene was 1.67 × 10−5 over the study period, which is significantly higher than the limits recommended by the U.S. EPA (1 × 10−6). Our study clearly proves that the ambient benzene concentration in Tehran has substantially higher carcinogenic effects on the population. Appropriate sustainable control measures should be taken to reduce air benzene concentration and protect public health. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
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