Affiliation:
1. São Paulo State University—UNESP São Vicente São Paulo Brazil
2. Oceanographic Institute University of São Paulo—USP São Paulo São Paulo Brazil
3. Centro de Estudos do Ambiente e do Mar—CESAM Universidade de Aveiro Aveiro Portugal
Abstract
AbstractThe rupture of the Fundão dam in Brazil released tons of mining tailings into the Doce River Basin (DRB). This investigation aimed to determine the bioaccumulation of metals in soft tissues of the bivalve Corbicula fluminea exposed to sediments collected in the DRB in four periods (just after, 1, 3, and 3.5 years after the dam rupture). In the exposure bioassays, the concentrations of Al, As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn in sediments and bivalve soft tissues were quantified. The concentration of some elements (As, Cd, Mn, and Al) in sediments exceeded the federal limits or regional backgrounds at some sampling sites, but their concentrations tended to decrease over time. However, higher concentrations of many elements were detected in the winter of 2019. Several elements were detected in C. fluminea soft tissues, but the bioaccumulation factors were generally low or not related to those elements associated with the ore tailings, evidencing that the bioavailability of metals to bivalves, in laboratory conditions, was limited. Integr Environ Assess Manag 2024;20:87–98. © 2023 SETAC
Funder
Fundação de Amparo à Pesquisa do Estado de São Paulo
Subject
General Environmental Science,General Medicine,Geography, Planning and Development
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1. Second Fundão Dam Rupture Science Meeting: Updating the science;Integrated Environmental Assessment and Management;2023-12-26