Assessment of heavy metal pollution transfer and human exposure risks from the consumption of chicken grown in mining-surrounding areas
2022
Elkribi-Boukhris, Sameh | M’hamdi, Naceur | Boughattas, Iteb | Helaoui, Sondes | Coriou, Cecile | Bussiere, Sylvie | Sappin-Didier, Valérie | Banni, Mohamed | Higher Institute of Agronomy | National Agronomic Institute of Tunisia (INAT) ; Université de Carthage (Tunisie) = University of Carthage (UCAR) | Laboratory of Biochemistry and Environmental Toxicology ; Institut Supérieur Agronomique Chott-Mériem (ISA) | Interactions Sol Plante Atmosphère (UMR ISPA) ; Ecole Nationale Supérieure des Sciences Agronomiques de Bordeaux-Aquitaine (Bordeaux Sciences Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
International audience
Afficher plus [+] Moins [-]anglais. The purpose of this study was to assess heavy metal contamination in soil, plants, earthworms, and chicken in farmlands adjacent to an old mining site and to evaluate the potential exposure risks to humans through the consumption of chicken. For this purpose, soil, earthworms, plant, chickens, and eggs were sampled from 5 sites following a gradient of contamination. All samples were analyzed for heavy metals (Pb, Cd, Cu, and Zn). A food chain model was used in order to characterize heavy metal transfer between soil-plant-earthworm and chicken organs. Furthermore, target hazard quotient (THQ), estimated daily intake (EDI), and hazard index (HI) were employed to assess human health risks posed by heavy metal contamination. Despite the higher level of Pb, our data related to the calculation of EDI and THQ suggested that local consumers are more at risk of Cd contamination. The calculated HI showed values ranging from 2.58 to 4.74 for adults, and up to 12.34 for children, indicating a considerable risk to the health of local inhabitants, especially children. This study highlighted the crucial role of diets based on chickens grown in contaminated areas, on health risks especially for children.
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