Fluoride in Commercially Important Bivalves from Polluted Sites along the Egyptian Sea Coasts: Relation to Human Health Risk

ABSTRACT The human health risk of fluoride from the consumption of four commercial bivalve species collected from contaminated sites along the Egyptian Sea coasts was assessed. The fluoride concentration in soft and shell tissues of fresh bivalve species (Callista florida, Paphia textile, Donax vittatus and Anadara diluvii) was determined. The predicted human health risk of fluoride from the consumption of the samples was studied by applying the calculations of estimated daily intake and hazard quotient for toddlers' (1.84–3.99 mg/kg/day and 15.1–32.7, respectively) and adults' (1.22–2.64 mg/kg/day and 10.0–21.7, respectively) ingestion. The fluoride contents in soft and shell tissues of bivalve samples along all the sampling locations were 0.38–0.64 and 0.56–0.69 mg/g with averages 0.50 ± 0.10 and 0.62 ± 0.05 mg/g, respectively. ANOVA and multiple regression analyses reflected that the accumulation of fluoride in bivalve species was influenced by the dimensions and weight of the bivalve species. The average calculated estimation of the daily intake of fluoride for toddlers and adults ingesting the bivalve species exceeded the lowest-observed-adverse-effect level of skeletal effects' value (LOAEL; 0.25 mg fluoride/kg/day). The evaluated hazard quotient values also pointed to the human health hazards that may be caused by bivalve consumption.

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