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Título: Exploring a new approach for assessing the fate and behavior of the tailings released by the Brumadinho dam collapse (Minas Gerais, Brazil)
Autor(es): Kobayashi, Hikari
Garnier, Jeremie
Mulholland, Daniel Santos
Quantin, Cecile
Haurine, Frédéric
Tonha, Myller
Joko, Caio
Olivetti, Diogo
Freydier, Remi
Seyler, Patrick
Martinez, Jean-Michel
Roig, Henrique Llacer
Afiliação do autor: University of Brasilia, Geoscience Institute
UnB/IRD, Joint International Laboratory LMI OCE “Observatory of Environmental Change"
University of Brasilia, Geoscience Institute
Universidade Federal de Tocantins, Laboratório de Análises Ambientais - Química Ambiental
GEOPS, Université, Paris Saclay – CNRS
GEOPS, Université, Paris Saclay – CNRS
University of Brasilia, Geoscience Institute
UnB/IRD, Joint International Laboratory LMI OCE “Observatory of Environmental Change"
Brazilian Federal PolicNational Institute of Criminalistics
University of Brasilia, Geoscience Institute
Université de Montpellier
UnB/IRD, Joint International Laboratory LMI OCE “Observatory of Environmental Change"
Université de Montpellier
Toulouse University, G´eoscience Environnement Toulouse
University of Brasilia, Geoscience Institute
UnB/IRD, Joint International Laboratory LMI OCE “Observatory of Environmental Change"
Assunto: Desastres
Barragens de terra
Contaminação por metais
Rejeitos de mineração
Geoquímica ambiental
Isótopos
Data de publicação: Jan-2023
Editora: Elsevier B.V.
Referência: KOBAYASHI, Hikari et al. Exploring a new approach for assessing the fate and behavior of the tailings released by the Brumadinho dam collapse (Minas Gerais, Brazil). Journal of Hazardous Materials, [S.l.], v. 448, 130828, 15 abr. 2023. DOI: https://doi.org/10.1016/j.jhazmat.2023.130828.
Abstract: In 2019, the Brumadinho dam rupture released a massive amount of iron ore mining tailings into the Paraopeba River. Up to now, it remains a public health issue for the local and downstream populations. The present study aims to assess the behavior and fate of metal contamination following the disaster. Using new sampling strategies and up-to-date geochemistry tools, we show that the dissolved metal concentrations (< 0.22 μm cutoff filtration) remained low in the Paraopeba River. Although the tailings present high metal concentrations (Fe, Mn, Cd, and As), the high local background contents of metals and other previous anthropogenic contamination hamper tracing the sediment source based only on the geochemical signature. The Pb isotopic composition coupled with the metals enrichment factor of sediments and Suspended Particulate Matter (SPM) constitutes accurate proxies that trace the fate and dispersion of tailing particles downstream of the dam collapse. This approach shows that 1) The influence of the released tailing was restricted to the Paraopeba River and the Retiro Baixo reservoir, located upstream of the S˜ao Francisco River; 2) The tailings’ contribution to particulate load ranged from 17 % to 88 % in the Paraopeba River; 3) Other regional anthropogenic activities also contribute to water and sediment contamination of the Paraopeba river.
Unidade Acadêmica: Instituto de Geociências (IG)
DOI: https://doi.org/10.1016/j.jhazmat.2023.130828
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