Mercury and selenium in fishes from the Tapajós River in the Brazilian Amazon: An evaluation of human exposure

Journal of Trace Elements in Medicine and Biology : Organ of the Society for Minerals and Trace Elements (GMS)
A S LinoOlaf Malm

Abstract

This work aimed to evaluate associated risks of fish consumption to human health, concerning mercury (Hg) and selenium (Se) concentrations in fish species largely consumed in the Tapajós River basin in the Brazilian Amazon. Total mercury (THg), methylmercury (MeHg) and Se concentrations were measured in 129 fish specimens from four sites of the Tapajós River basin. Estimated daily intake (EDI) of Hg and Se were reported regarding fish consumption. EDI were compared with the reference value of provisional tolerable daily intake proposed by the World Health Organization (WHO). Se:Hg ratios and selenium health benefit values (Se HBVs) seem to offer a more comprehensive fish safety model. THg concentrations in fishes ranged from 0.03 to 1.51 μg g-1 of wet weight (w.w.) and MeHg concentrations ranged from 0.02 to 1.44 μg g-1 (w.w.). 80% of the samples were below the value of Hg recommended by the WHO for human consumption (0.5 μg g-1 w.w.). However, Hg EDI exceeded the dose suggested by the United States Environmental Protection Agency (0.1 μg kg-1 day-1), due to the large level of fish consumption in that area. Se concentrations in fishes ranged from 0.02 to 0.44 μg g-1 w.w. An inverse pattern was observed between Hg and Se concent...Continue Reading

Citations

Aug 31, 2018·International Journal of Environmental Research and Public Health·Tara K B JohnsonW Gregory Cope
Nov 16, 2019·Environmental Science and Pollution Research International·Maria Alcala-OrozcoJesus Olivero-Verbel
Feb 14, 2019·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Tainá Elisa de Mello LazariniMarcelo Antonio Morgano
Oct 8, 2020·Archives of Environmental Contamination and Toxicology·Maria Alcala-OrozcoJesus Olivero-Verbel
Oct 30, 2020·Environment International·Maria Elena Crespo-LopezGabriela P Arrifano
May 18, 2020·The Science of the Total Environment·Fabio Edir Amaral AlbuquerqueMarta López-Alonso
Jul 28, 2019·Journal of Trace Elements in Medicine and Biology : Organ of the Society for Minerals and Trace Elements (GMS)·Nicholas V C RalstonLaura J Raymond
Mar 15, 2020·Ecotoxicology and Environmental Safety·Qing XieDingyong Wang

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