Bioaccessibility, dietary exposure and human risk assessment of heavy metals from market vegetables in Hong Kong revealed with an in vitro gastrointestinal model

Junli HU, Fuyong WU, Shengchun WU, Zhihong CAO, Xiangui LIN, Ming Hung WONG

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Abstract

A systematic survey of heavy metal (HM) concentrations and bioaccessibilities in market vegetables in Hong Kong were carried out for assessing potential health risk to local inhabitants. The average concentrations of Cd, Pb, Cr, Ni, Cu, and Zn in nine major groups of fresh vegetable varied within 0.007-0.053, 0.05-0.17, 0.05-0.24, 0.26-1.1, 0.62-3.0, and 0.96-4.3 mg kg-1, respectively, and their average bioaccessibilities varied within 21-96%, 20-68%, 24-62%, 29-64%, 30-77%, and 69-94%, respectively. The bioaccessible estimated daily intakes (BEDIs) of Cd, Pb, Cr, Ni, Cu, and Zn from vegetables were far below the tolerable limits. The total bioaccessible target hazard quotient (TBTHQ) of the six HMs was 0.18 and 0.64 for average and high consumers, respectively, with Cd and leafy vegetable being the major risk contributors. Risk assessment of HMs from foods should be modified by taking bioaccessibility into account. Copyright © 2012 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)455-461
JournalChemosphere
Volume91
Issue number4
Early online date27 Dec 2012
DOIs
Publication statusPublished - Apr 2013

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Vegetables
Hong Kong
Heavy Metals
Risk assessment
vegetable
Heavy metals
risk assessment
heavy metal
market
leafy vegetable
health risk
Health risks
hazard
Hazards
food
Food
exposure
In Vitro Techniques
Health

Citation

Hu, J., Wu, F., Wu, S., Cao, Z., Lin, X., & Wong, M. H. (2013). Bioaccessibility, dietary exposure and human risk assessment of heavy metals from market vegetables in Hong Kong revealed with an in vitro gastrointestinal model. Chemosphere, 91(4), 455-461. doi: 10.1016/j.chemosphere.2012.11.066

Keywords

  • Cadmium (Cd)
  • Contamination
  • Estimated daily intake (EDI)
  • High consumer
  • Leafy vegetable
  • Target hazard quotient (THQ)