Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8870704 | Marine Pollution Bulletin | 2018 | 9 Pages |
Abstract
We present an alternative approach for establishing in situ bioaccumulation assessment of methyl-Hg (MeHg), total-Hg, Cd, Pb and Zn in bivalve Anomalocardia brasiliana from four bays of Rio de Janeiro presenting varying degrees of eutrophication, acid volatile sulfides (2-55â¯Î¼molâ¯gâ1), simultaneously extracted metals (SEM) and total metals (TM) in sediments. Using metal concentrations of composite samples from three size classes of bivalve and their incorporation rates (IRâ¯=â¯metal concentrationâ¯/â¯total length), which depend on exposure time, we calculated asymptotic IR and respective consequent metal concentrations. Both IR and the metal concentration presented inverse relationships with total length (excepting MeHg) and bay contamination. Lead and zinc concentrations were above Brazilian legal criteria in the most anoxic and contaminated bay, suggesting significant metal bioavailability (SEM/TM between 8% and 63%).
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Oceanography
Authors
Cristiane da Silveira Fiori, Ana Paula de Castro Rodrigues, Thatianne Castro Vieira, Elisamara Sabadini-Santos, Edison Dausacker Bidone,