Trace metals in estuarine organisms from a port region in southern Brazil: consumption risk to the local population

Metal contamination is a threat to estuarine environments. They can accumulate in the food chain and cause toxic effects on aquatic organisms and human health. This study evaluated the concentrations of metals (Cd, Cr, Cu, Fe, Ni, Pb, and Zn) in aquatic organisms of Antonina Bay (southern Brazil) to...

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Published in:	Environmental science and pollution research international 2021-02, Vol.28 (5), p.5283-5295
Main Authors:	de Moraes Calado, Sabrina Loise, Salgado, Lilian Dalago, Santos, Gustavo Souza, da Silva Carvalho Neto, Fernando, de Menezes, Márcia Santos
Format:	Article
Language:	eng
Subjects:	Animals Aquatic animals Aquatic biota Aquatic organisms Aquatic Pollution Atmospheric Protection/Air Quality Control/Air Pollution Bioaccumulation Biological magnification Biota Brazil Cadmium Chromium Chronic exposure Copper Earth and Environmental Science Ecotoxicology Environment Environmental Chemistry Environmental Health Environmental Monitoring Environmental science Estuaries Estuarine environments Estuarine organisms Food chains Food contamination Food law Health risks Humans Iron Lead Legislation Metal concentrations Metals Metals - analysis Metals, Heavy - analysis Nickel Organisms Oysters Research Article Risk Seafood Seafood - analysis Shellfish Toxicity Trace Elements Trace metals Waste Water Technology Water Management Water Pollutants, Chemical - analysis Water Pollution Control Xiphopenaeus kroyeri Zinc
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Summary:	Metal contamination is a threat to estuarine environments. They can accumulate in the food chain and cause toxic effects on aquatic organisms and human health. This study evaluated the concentrations of metals (Cd, Cr, Cu, Fe, Ni, Pb, and Zn) in aquatic organisms of Antonina Bay (southern Brazil) to analyze whether the metal concentrations were in accordance with Brazilian food legislation and estimate the human risk of local seafood consumption. All analyzed organisms ( Centropomus parallelus , Mugil curema , Genidens genidens , Crassostrea brasiliana , and Xiphopenaeus kroyeri ) showed traces of metals in their tissues with different metal concentrations among species. Metal concentrations were generally higher in oyster C. brasiliana , and biomagnification was not observed. Cr and Zn concentrations were above the limits established by legislation for all species in at least one sample. The concentrations of the other metals were within permitted levels. However, concentrations of Cd, Cr, Fe, and Zn posed a human consumption risk. In general, the C. brasiliana oyster presented the highest risk for human consumption, probably due to its filtering habit. Thus, the results indicated that metal concentrations in the tissues of the Antonina Bay seafood can pose a risk to human health, and this chronic exposure to metals also can cause toxic effects on local aquatic biota.
ISSN:	0944-1344 1614-7499