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Risk Assessment for Oral Bioaccessibility of Lead and Cadmium in the Potato Growing in Smelter-Impacted Soil

Abstract

Smelting activities are an important source of heavy metals in soil. More seriously, oral ingestion of crops growing in contaminated soil potentially cause harmful effects on human health. The main purpose of this study is to apply the in vitro model (PBET) and Monte Carlo Simulation (MSC) to the health risk assessment process in order to more accurately and realistically evaluate health risks of residents eating contaminated potato. Results indicated in the raw and cooked potato, the bioaccessibility of Pb was 65.9% and 74.5%, and that of Cd was 79.6% and 61.7%, respectively. Additionally, the bioaccessible hazard quotient (BHQ) was less than the permitted level except for the BHQ of Pb for children. This indicated there wasn’t potential non-carcinogenic risk for most potato-consumers but the dietary exposure risk for local children cannot be neglected. Sensitivity analysis showed that the bioaccessibility and ingestion rate appeared decisive with respect to potentially deleterious health effects.

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Acknowledgements

This research was supported by the Joint Funds of the National Natural Science Foundation of China (U1612442), the National Natural Science Foundation of China (41663009), the National Key R&D Projects of China (2018YFC1802602), the High-level Innovative Talent of Guizhou Province ([2020]6002), and the Project of Innovation in Postgraduate Education in Guizhou (YJSCXJH[2019]038).

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Correspondence to Yonggui Wu.

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Luo, Y., Duan, Z. & Wu, Y. Risk Assessment for Oral Bioaccessibility of Lead and Cadmium in the Potato Growing in Smelter-Impacted Soil. Bull Environ Contam Toxicol 106, 363–369 (2021). https://doi.org/10.1007/s00128-020-03099-y

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Keywords

  • Smelter-impacted potato
  • Heavy metal
  • PBET
  • Dietary exposure risk
  • Monte carlo simulation