Drying Characteristics and Heavy Metal Levels in Three Marine Fishes Commercialized in Brazil / Características de secagem e teor de metais pesados em três espécies de peixes marinhos comercializados no Brasil

Joane Grassi de Oliveira, Matheus Poletto


Fish is an important food in human diet. Drying processes are used to preserve its quality while the determination of inorganic contaminants in fish is helpful to maintain human health. In this study, the effect of drying conditions on moisture ratio and effective diffusivity of Prionace glauca (PRG), Squatina guggenheim (SQG) and Theragra chalcogramma (THC) was examined. Five thin layer drying models were fitted to drying data. In addition, the concentration of As, Ni, Cr and Hg in the fish samples were also determined by means of Inductively Coupled Plasma Optic Emission Spectrometry (ICP-OES). The results reveal that THC presented both the highest effective moisture diffusivity and moisture evolution with drying time. The Page model showed the best fitting of experimental data. All samples presented levels of Cr and Hg higher than the permitted by Brazilian legislation. High levels of As were found to SQG and PRG. This study indicated the need to establish monitoring programs in Brazil to prevent the intake of fish meat with high levels of toxic metals.



dry, diffusion coefficient, fish, metal contamination, modeling.


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DOI: https://doi.org/10.34117/bjdv6n10-206


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