Evaluation of health risk due to inhalation of volatile organic components in the ambient air of Khorramabad.
Subject Areas : air pollution
1 - Tehran university
Keywords: carcinogenic risk . BTEX, non -carcinogenic, volatile components,
Abstract :
In this paper, carcinogenic and non-carcinogenic risk assessment is investigated by inhalation volatile organic components in the ambient air of Khorramabad. These compounds include benzene, ethylbenzene , toluene , xylenes (BTEX) and normal Hexane. To assess the risk ,first two different scenarios were defined based on the exposure of people to the organic compounds in question and the duration of respiration. Then, the average amount of intake CDI or respiration of mentioned pollutants during life was extracted based on dual scenarios in 11 areas of Khorramabad city. The carcinogenic risk for benzene and ethylbenzene compounds as well as the non- carcinogenic risk for all pollutants discussed in both scenarios were calculated and discussed. It should be noted that due to the high amount of calculations and ease and accuracy in results, programming was done in excel software environment and the initial and final results were calculated directly from this method and the necessary diagrams were drawn. According to the calculation , the annual risk and the total risk of carcinogenicity of inhaling the pollutants in question in the air of Khorramabad for the first scenario are equal to 1.51 E -06 and 5.65 E-01 people per year , respectively. Also, the annual risk and the total risk for the second scenario are 6.19E-07 and 2.31 E-01 per year ,respectively. In addition , the non-carcinogenic risk index for inhalation of the these compounds in the ambient air of Khorramabad is 3.898 and 0.594 for the first and second scenarios respectively.
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