Contamination and Human Health Risk Assessment of Arsenic and Mercury in Seafood from Looal Fish Rafts, Trang Province, Thailand

Arsenic (As) and mercury (Hg) are well recognized as highly toxic elements to human health caused by their high impacts on living bodies. They present properties of bioaccumulation, biomagnification in food chain, persistence in the environment, and disturbances in metabolic processes. Seafood may accumulate As and Hg from contaminated environment. The aims of this study were to determine As and Hg contents in edible tissues of popular seafood including squaretail mullet (Ellochelon vaigiensis), mud spiny lobster (Panulirus polyphagus), giant tiger prawn (Penaeus monodon), and smooth squillid mantis shrimp (Harpiosqulla raphidea). Human health risks were also assessed using target hazard quotient (THQ) and cancer risk (CR) for both elements.