Original Research

Health risk assessment of metal fumes in an Iranian Mineral Salt company


Introduction: Salt is a crucial mineral for human health, however, a salt factory may lead to hazardous pollutant exposure. Heavy metal fumes are considered toxic for human health. This study aimed to investigate concentration and assess health risks posed by toxic fumes in a salt factory.

Materials and methods: Three units in the factory including salt laboratory, maintenance and metalworks were sampled for Arsenic (As), chromium (Cr), cadmium (Cd), cobalt (Co) and lead (Pb) according to the National Institute for Occupational Safety and Health, NIOSH7300 method, and analyzed using Inductively Coupled Plasma-Atomic Emission Spectrometers (ICP-AES).

Results: All hazardous levels of fumes were below the permissible limit. The highest concentration of toxic fumes (Cr) was found in the maintenance unit. With 0.0758 mg/m3, the highest total concentrations of heavy metals (tHM) was found in the maintenance unit (tHM for Salt laboratory=0.0281 mg/m3 and metalworks=0.0103 mg/m3). In salt laboratory, the metal fumes concentrations were ordered as Pb>As>Cd>Cr>Co; in maintenance unit: Cr>Pb>As>Co>Cd; in metalworks: Cr>As>Pb>Co>Cd. The total hazard quotient (tHQ) and lifetime cancer risk in salt laboratory unit were 5.11 and 4.93E-01, respectively; in maintenance the tHQ=9.35E+01 and LCR =5.90E-01; in metalworks tHQ=6.57 and LCR=4.95E-02.

Conclusion: The pollutant levels were below the acceptable limit. Yet, the non-carcinogenic and carcinogenic risks that they pose are not negligible. Therefore, enhancing the efficiency of the ventilation system and additional monitoring on wearing protective equipment as preventive strategies are proposed.

1. States WHOM. Salt reduction 29. 2020;(April):1–6. Available from: https://www.who.int/news-room/fact-sheets/detail/salt-reduction
2. Lee Y, Nam SH, Ham KS, Gonzalez J, Oropeza D, Quarles D, et al. Multivariate classification of edible salts: Simultaneous Laser-Induced Breakdown Spectroscopy and Laser-Ablation Inductively Coupled Plasma Mass Spectrometry Analysis. Spectrochim Acta - Part B At Spectrosc. 2016 Apr 1;118:102–11.
3. Karavoltsos S, Sakellari A, Bakeas E, Bekiaris G, Plavšić M, Proestos C, et al. Trace elements, polycyclic aromatic hydrocarbons, mineral composition, and FT-IR characterization of unrefined sea and rock salts: environmental interactions. Environ Sci Pollut Res. 2020;27(10):10857–68.
4. Khaniki GRJ, Dehghani MH, Mahvi AH, Nazmara S. Determination of trace metal contaminants in edible salts in Tehran (Iran) by atomic absorption spectrophotometry. Vol. 7, Journal of Biological Sciences. 2007. p. 811–4.
5. Soylak M, Peker DSK, Turkoglu O. Heavy metal contents of refined and unrefined table salts from Turkey, Egypt and Greece. Environ Monit Assess [Internet]. 2008 Aug 16 [cited 2020 Jul 18];143(1–3):267–72. Available from: https://link.springer.com/article/10.1007/s10661-007-9975-9
6. Bakri SFZ, Hariri A, Ismail M, Damanhuri AAM. Evaluation of industrial workplace exposure to metal fumes using toenail as bio-indicator. Int J Integr Eng. 2019;11(5 Special Issue):133–9.
7. K U, Chavan S. Assessment of Oral Health among Salt Workers of Little Rann of Kutch, North Gujarat. IRA-International J Appl Sci (ISSN 2455-4499). 2016;3(3):431–7.
8. Stanislawska M, Janasik B, Kuras R, Malachowska B, Halatek T, Wasowicz W. Assessment of occupational exposure to stainless steel welding fumes – A human biomonitoring study. Toxicol Lett. 2020 Sep 1;329:47–55.
9. Kawada T. Occupational heavy metal exposures and kidney dysfunction. Biol Trace Elem Res. 2020;194(1):1–2.
10. Pocket Guide to Chemical Hazards | NIOSH | CDC [Internet]. [cited 2020 Jul 26]. Available from: https://www.cdc.gov/niosh/npg/default.html
11. EPA A. Risk assessment guidance for superfund. Volume I: human health evaluation manual (part a). 1989;
12. Science VS-WA of, Engineering undefined, 2012 undefined. Health risk assessment of heavy metals adsorbed in particulates. pdfs.semanticscholar.org.
13. Kamunda C, Mathuthu M, Madhuku M. Health risk assessment of heavy metals in soils from witwatersrand gold mining basin, South Africa. Int J Environ Res Public Health. 2016 Jul;13(7).
14. Mousavian NA, Mansouri N, Nezhadkurki F. Estimation of heavy metal exposure in workplace and health risk exposure assessment in steel industries in Iran. Meas J Int Meas Confed [Internet]. 2017;102:286–90. Available from: http://dx.doi.org/10.1016/j.measurement.2017.02.015
15. Li K, Liang T, Wang L, Yang Z. Contamination and health risk assessment of heavy metals in road dust in Bayan Obo Mining Region in Inner Mongolia, North China. J Geogr Sci. 2015 Dec;25(12):1439–51.
16. Yang Y, Fang W, Xue M, Xu Z, Huang C. TSP, PM10 and health risk assessment for heavy metals (Cr, Ni, Cu, Zn, Cd, Pb) in the ambience of the production line for waste cathode ray tube recycling. J Mater Cycles Waste Manag [Internet]. 2016;18(2):296–302. Available from: http://dx.doi.org/10.1007/s10163-014-0331-1
17. Bakri SFZ, Hariri A, Ismail M, Abdullah S, Kassim NI. Evaluation of respiratory symptoms, spirometric lung patterns and metal fume concentrations among welders in indoor air-conditioned building at Malaysia. Int J Integr Eng. 2018;10(5):109–21.
18. Programmes H, Credits S. University of Health and Allied Sciences School of Public Health. 2017;313:1–4.
19. Proctor DM, Suh M, Campleman SL, Thompson CM. Assessment of the mode of action for hexavalent chromium-induced lung cancer following inhalation exposures. Toxicology [Internet]. 2014;325:160–79. Available from: http://www.sciencedirect.com/science/article/pii/S0300483X14001681
20. Junaid M, Hashmi MZ, Tang Y, Malik RN, Pei D. Potential health risk of heavy metals in the leather manufacturing industries in Sialkot , Pakistan. Sci Rep [Internet]. 2017;(March):1–13. Available from: http://dx.doi.org/10.1038/s41598-017-09075-7
IssueVol 5 No 3 (2020): Summer 2020 QRcode
SectionOriginal Research
DOI https://doi.org/10.18502/japh.v5i3.5389
Health risk assessment Fumes Salt factory

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How to Cite
Kalteh S, Mozaffari S, Molaei I, Maleki R. Health risk assessment of metal fumes in an Iranian Mineral Salt company. japh. 5(3):163-170.