Hair heavy metals and food consumption in residents of Chengdu: Factors, food contribution, and health risk assessment

Hong-Xin ZENG, Yu Bon MAN, Ming Hung WONG, Zhang CHENG

Research output: Contribution to journalArticlespeer-review

Abstract

Heavy metal pollution is one of the most pressing issues threatening food security and human health. This study assesses heavy metal (chromium, cadmium, copper, zinc, nickel, and lead) exposure via hair metal concentrations in Chengdu residents, reflecting metal intake from food consumption. From June 2020 to February 2021, a sampling survey was conducted on residents’ hair (n=182) and food (n=301) in six main urban areas of Chengdu. The concentrations of heavy metals in hair and food were analyzed by inductively coupled plasma mass spectrometry, and the results showed that the residents of Chengdu City had high hair concentrations of Cd (0.17±0.03 mg kg⁻¹) and Zn (293±21.3 mg kg⁻¹). Gender significantly affected the hair Cr, Zn, and Ni concentrations. Based on the survey results obtained from Chengdu City residents, the habits and diet structure are assessed for the influence of six heavy metals in the hair of the residents. Adolescents’ (13–18 years old) hair had significantly higher Pb concentrations than adults (19–59 years old). The concentration of Ni in hair was affected by perming and dyeing habits. For dietary exposure, cereals and meat were the main contributors to the residents’ daily intake of heavy metals. The bioaccessibility of Cr, Cd, Cu, Zn, Ni, and Pb in food was 2.45–74.67%, 10.6–78.7%, 13.4–82.5%, 8.89–89.2%, 7.70–85.1%, and 15.4–86.2%, respectively. In health risk evaluation based on the bioaccessible fraction of six heavy metals, the hazard quotient of each heavy metal in food was less than 1, indicating no potential non-carcinogenic risk. Copyright © 2023 The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
Original languageEnglish
Pages (from-to)1503-1516
JournalBiological Trace Element Research
Volume202
Early online dateJul 2023
DOIs
Publication statusPublished - Apr 2024

Citation

Zeng, H.-X., Man, Y. B., Wong, M. H., & Cheng, Z. (2024). Hair heavy metals and food consumption in residents of Chengdu: Factors, food contribution, and health risk assessment. Biological Trace Element Research, 202, 1503-1516. https://doi.org/10.1007/s12011-023-03785-y

Keywords

  • Bioaccessibility
  • Hazard quotient
  • Gender difference
  • Age difference
  • Dietary preference

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