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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Role of Fe dynamic in release of metals at Rio Doce estuary: Unfolding of a mining disaster

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Author(s):
Queiroz, Hermano M. [1] ; Ying, Samantha C. [2, 3] ; Bernardino, Angelo F. [4] ; Barcellos, Diego [1] ; Nobrega, Gabriel N. [5] ; Otero, Xose L. [6] ; Ferreira, Tiago O. [1]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo ESALQ USP, Luiz de Queiroz Coll Agr, Av Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil
[2] Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521 - USA
[3] Univ Calif Riverside, Environm Toxicol Grad Program, Riverside, CA 92521 - USA
[4] Univ Fed Espirito Santo, Dept Oceanog, BR-29075910 Vitoria, ES - Brazil
[5] Univ Santiago de Compostela, Dept Edaphol & Agr Chem, CRETUS Inst, Fac Biol, Campus Sur, Santiago De Compostela 15782 - Spain
[6] Fed Fluminense Univ, Grad Program Earth Sci Geochem, Dept Geochem, Niteroi, RJ - Brazil
Total Affiliations: 6
Document type: Journal article
Source: Marine Pollution Bulletin; v. 166, MAY 2021.
Web of Science Citations: 1
Abstract

The role of Fe oxyhydroxides dynamic on metal bioavailability was studied in the Rio Doce estuary after the largest mining disaster in the world. Soon after the disaster in 2015, metals were associated with Fe oxyhydroxides under a redox-active estuarine environment. Our results indicate that organic matter inputs from plant colonization on deposited tailings over estuarine soils led to a reductive dissolution of Fe oxyhydroxides within two years. Soil pseudo-total Fe content decreased by 70% between 2015 and 2017, while the total metal contents (Cr, Cu, Ni, Pb, and Zn) decreased by 79% in the soil. The losses of Fe and metals coupled to changes in Fe oxides crystallinity reveal a future ephemeral control of Fe oxyhydroxides over metal immobilization. Our results suggest a potential chronic contamination at the estuary and points to an aggravating scenario for the following years due to the increasing dominance of poorly crystalline Fe oxyhydroxides. (AU)

FAPESP's process: 19/17413-2 - Redox processes controlling Fe oxide-associated metals dynamics in rio Doce estuary sediments after the Mariana dam disaster
Grantee:Hermano Melo Queiroz
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 19/19987-6 - Soils and plants of the Rio Doce estuary controlling the biogeochemistry of iron and metals in response to the Mariana (MG) disaster
Grantee:Tiago Osório Ferreira
Support Opportunities: Regular Research Grants
FAPESP's process: 18/04259-2 - Iron biogeochemistry and its control on dynamics of trace metals in the soils of Doce River estuary after the "Mariana disaster"
Grantee:Hermano Melo Queiroz
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 19/02855-0 - Redox fluctuations, iron and heavy metals dynamics in soils from Rio Doce estuary after the "Mariana (MG) disaster": an experimental approach
Grantee:Diego Barcellos
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 18/08408-2 - Comparative studies of the mineral transformation of iron oxide nanoparticles in mine-tailing affected sediments and soils and their impacts on mobilization and fixation of heavy metals under two contrasting redox environments
Grantee:Tiago Osório Ferreira
Support Opportunities: Regular Research Grants