Safety and Health at Work

Occupational Safety and Health Research Institute, Korea Occupational Safety and Health Agency (산업안전보건연구원)
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Quantitative and Semiquantitative Health Risk Assessment of Occupational Exposure to Styrene in a Petrochemical Industry

  • Moshiran, Vahid Ahmadi (School of Public Health, Tehran University of Medical Sciences) ;
  • Karimi, Ali (Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences) ;
  • Golbabaei, Farideh (Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences) ;
  • Yarandi, Mohsen Sadeghi (School of Public Health, Tehran University of Medical Sciences) ;
  • Sajedian, Ali Asghar (School of Public Health, Tehran University of Medical Sciences) ;
  • Koozekonan, Aysa Ghasemi (School of Public Health, Tehran University of Medical Sciences)
  • Received : 2019.12.28
  • Accepted : 2021.01.24
  • Published : 2021.09.30
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Abstract

Background: Styrene is one of the aromatic compounds used in acetonitrile-butadiene-styrene (ABS) producing petrochemicals, which has an impact on health of workers. Therefore, this study aimed to investigate the health risks of styrene emitted from the petrochemical industry in Iran. Methods: Air samples were collected based on NIOSH 1501 method. The samples were analyzed by the Varian-cp3800 gas chromatograph. Finally, risk levels of styrene's health effects on employees were assessed by the quantitative method of the U.S. Environmental Protection Agency (U.S. EPA) and the semiquantitative way by the Singapore Occupational Safety and Health Association. Results: Based on the results, the employees had the highest average exposure to styrene vapors (4.06 × 10-1mg.(kg - day)-1) in the polybutadiene latex (PBL) unit. Therefore, the most top predictors of cancer and non-cancer risk were 2.3×10-4 and 7.26 × 10-1, respectively. Given that the lowest average exposure (1.5 × 10-2mg.(kg - day)-1) was in the dryer unit, the prediction showed a moderate risk of cancer (0.8 × 10-6) and non-cancer (2.3 × 10-3) for the employees. The EPA method also predicted that there would be a definite cancer risk in 16% and a probable risk in 76% of exposures. However, according to the semiquantitative approach, the rate of risk was at the "low" level for all staff. The results showed that there was a significant difference (p < 0.05) between the units in exposure and health risk of styrene (p < 0.05). Conclusion: Given the high risk of styrene's health effects, appropriate control measures are required to reduce the exposure level.

Keywords

Acknowledgement

Tehran University of Medical Sciences funded this study under research ethics certificate: I.R.TUMS.SPH.REC.1398.023. Therefore, the authors thank Tehran University of Medical Sciences for their financial support.

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