Are Chinese consumers at risk due to exposure to metals in crayfish? A bioaccessibility-adjusted probabilistic risk assessment

Environment International
Qian PengHuan Zhong

Abstract

Freshwater crayfish, the world's third largest crustacean species, has been reported to accumulate high levels of metals, while the current knowledge of potential risk associated with crayfish consumption lags behind that of finfish. We provide the first estimate of human health risk associated with crayfish (Procambarus clarkii) consumption in China, the world's largest producer and consumer of crayfish. We performed Monte Carlo Simulation on a standard risk model parameterized with local data on metal concentrations, bioaccessibility (φ), crayfish consumption rate, and consumer body mass. Bioaccessibility of metals in crayfish was found to be variable (68-95%) and metal-specific, suggesting a potential influence of metal bioaccessibility on effective metal intake. However, sensitivity analysis suggested risk of metals via crayfish consumption was predominantly explained by consumption rate (explaining >92% of total risk estimate variability), rather than metals concentration, bioaccessibility, or body mass. Mean metal concentrations (As, Cd, Cu, Ni, Pb, Se and Zn) in surveyed crayfish samples from 12 provinces in China conformed to national safety standards. However, risk calculation of φ-modified hazard quotient (HQ) and haz...Continue Reading

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Citations

May 13, 2017·International Journal of Environmental Research and Public Health·Gang WangHuan Zhong
Oct 27, 2017·Environmental Monitoring and Assessment·Mohammad MiriMahmoud Taghavi
Oct 6, 2017·Environmental Science and Pollution Research International·Luís Miguel Nunes, Xosé Otero
Feb 21, 2019·Environmental Monitoring and Assessment·Tian-Tian ZuoLang-Chong He
Apr 23, 2020·Environmental Science and Pollution Research International·Tian-Tian ZuoShuang-Cheng Ma
Aug 10, 2021·Environmental Science and Pollution Research International·Aijie MoYongchao Yuan

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