Evaluation of health risk due to inhalation of volatile organic components in the ambient air of Khorramabad

In this research, 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. First, two different scenarios were defined to assess the risk, based on the exposure of people to the volatile organic compounds and the duration of respiration. Then, the average amount of intake CDI or chronic daily intake due to 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 were measured and discussed in both scenarios. It should be noted that due to the high number of calculations and ease and accuracy in results, programming was done in excel software 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 the ambient 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 these compounds in the ambient air of Khorramabad is 3.898 and 0.594 for the first and second scenarios respectively