Kobayashi H. auteur aut IRD Garnier J. auteur aut IRD Mulholland D. S. auteur aut IRD Quantin C. auteur aut IRD Haurine F. auteur aut IRD Tonha M. auteur aut IRD Joko C. auteur aut IRD Olivetti D. auteur aut IRD Freydier R. auteur aut IRD Seyler Patrick auteur aut IRD Martinez J. M. auteur aut IRD Roig H. L. auteur aut IRD text journalArticle eng text/pdf born digital access 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 mu m 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 Sa similar to o 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. specialized Brumadinho dam disaster Metal contamination Paraopeba River Mine tailings Environmental geochemistry Pb isotopes Metal dynamics BRESIL MINAS GERAIS 062 064 038 448 130828 [11 ] 2023 0304-3894 https://www.documentation.ird.fr/hor/fdi:010087626 10.1016/j.jhazmat.2023.130828 0304-3894 [F B010087626] https://www.documentation.ird.fr/hor/fdi:010087626 https://www.documentation.ird.fr/intranet/publi/2023-06/010087626.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2023-06-30 2026-06-12 fdi:010087626 fre