The present work aimed to evaluate the health risks of occupational exposure to heavy metals in a steel casting unit of a steel plant. To determine occupational exposure to heavy metals, personal air samples were taken from the workers’ breathing zones using the National Institute for Occupational Safety and Health method. Noncancer and cancer risks due to the measured metals were calculated according to the United States Environmental Protection Agency procedures. The results indicated that the noncancer risks owing to occupational exposure to lead (Pb) and manganese were higher than the recommended value in most of the workstations. The estimated cancer risk of Pb was also higher than the allowable value. Moreover, the results of sensitivity analysis indicated that the concentration, inhalation rate, and exposure duration were the most influencing variables contributing to the calculated risks. It was thus concluded that the present control measures were not adequate and further improvements were required for reducing the exposure levels.
AsadiADehghaniMZareM, et al. (2012) Removal of chromium (VI) using UV/ZnO, UV/TiO2 and UV/H2O2 processes from aqueous solutions. Journal of North Khorasan University of Medical Sciences3(4): 7–13.
2.
BarnesDGDoursonMPreussP, et al. (1988) Reference dose (RfD): Description and use in health risk assessments. Regulatory Toxicology and Pharmacology8(4): 471–486.
3.
BuranatrevedhS (2011) Health risk assessment of workers exposed to metals from an aluminium production plant. Journal of the Medical Association of Thailand93(12): 136.
4.
ChenPBiXZhangJ, et al. (2015) Assessment of heavy metal pollution characteristics and human health risk of exposure to ambient PM2.5 in Tianjin, China. Particuology20: 104–109.
5.
DehghaniFOmidiFHeravizadehO, et al. (2020) Occupational health risk assessment of volatile organic compounds emitted from the coke production unit of a steel plant. International Journal of Occupational Safety and Ergonomics26 (2): 227–232.
6.
FallahzadehRAKhosraviRDehdashtiB, et al. (2018) Spatial distribution variation and probabilistic risk assessment of exposure to chromium in ground water supplies; a case study in the east of Iran. Food and Chemical Toxicology115: 260–266.
7.
FuFWangQ (2011) Removal of heavy metal ions from wastewaters: A review. Journal of Environmental Management92(3): 407–418.
8.
GiahiOKhoubiJBarkhordariA, et al. (2014) Assessment of fumes generated from cutting of scrap metals by AAS and ICP-AES in a steel industry. Journal of Health5(1): 29–35.
9.
JaishankarMTsetenTAnbalaganN, et al. (2014) Toxicity, mechanism and health effects of some heavy metals. Interdisciplinary Toxicology7(2): 60–72.
10.
MahviAHGhanbariyanMZadehRN, et al. (2012) Photocatalytic degradation of alkyle benzene solfunate (LAS) from aqueous solution using TiO2 nanoparticles. Journal of Water and Wastewater24: 2–9.
11.
MeansB (1989) Risk-assessment guidance for superfund. Volume 1. Human Health Evaluation Manual. Part A. Interim report (Final). Washington, DC: Environmental Protection Agency, Office of Solid Waste and Emergency Response.
12.
MHME (2021) Occupational exposure limits. 5th edition. Volume 1. Tehran, Iran: Ministry of Health and Medical Education, Environmental and Occupational Health Center
13.
MousavianNAMansouriNNezhadkurkiF (2017) Estimation of heavy metal exposure in workplace and health risk exposure assessment in steel industries in Iran. Measurement102: 286–290.
14.
NieuwenhuijsenMPaustenbachDDuarte-DavidsonR (2006) New developments in exposure assessment: The impact on the practice of health risk assessment and epidemiological studies. Environment International32(8): 996–1009.
15.
NIOSH (2003) National Institute of Occupational Safety and Health . Elements (ICP) (nitric/perchloric acid ashing). Method 7300, issue 3. In: NIOSH Manual of Analytical Methods. 4th ed. Atlanta, GA: NIOSH.
16.
NRC (1983) National Research Council. Risk Assessment in the Federal Government: Managing the Process. Washington, DC: Ntional Academy Press.
17.
NriaguJOPacynaJM (1988) Quantitative assessment of worldwide contamination of air, water and soils by trace metals. Nature333(6169): 134–139.
18.
SadovskaV (2012) Health risk assessment of heavy metals adsorbed in particulates. World Academy of Science, Engineering and Technology68: 2151–2158.
19.
SinghLPBhardwajADeepakKK (2013) Occupational exposure to respirable suspended particulate matter and lung functions deterioration of steel workers: An exploratory study in India. International Scholarly Research Notices2013: 1–8.
20.
SitasFDouglasAJWebsterE (1989) Respiratory disease mortality patterns among South African iron moulders. Occupational and Environmental Medicine46(5): 310–315.
21.
TchounwouPBYedjouCGPatlollaAK, et al. (2012) Heavy metal toxicity and the environment. In: LuchA (ed) Molecular, Clinical and Environmental Toxicology. Berlin: Springer, pp.133–164.
22.
VestergaardNStephansenURasmussenL, et al. (1986) Airborne heavy metal pollution in the environment of a Danish steel plant. Water, Air, and Soil Pollution27(3–4): 363–377.
23.
WuBZhangYZhangX-X, et al. (2011) Health risk assessment of polycyclic aromatic hydrocarbons in the source water and drinking water of China: Quantitative analysis based on published monitoring data. Science of the Total Environment410: 112–118.
24.
YamanM (2006) Comprehensive comparison of trace metal concentrations in cancerous and non-cancerous human tissues. Current Medicinal Chemistry13(21): 2513–2525.
25.
ZhengNLiuJWangQ, et al. (2010) Health risk assessment of heavy metal exposure to street dust in the zinc smelting district, Northeast of China. Science of the Total Environment408(4): 726–733.
