Geochemical evaluation of bottom sediments affected by historic mining and the rupture of the Fundão dam, Brazil

Reis, Deyse Almeida dos; Nascimento, Laura Pereira do; Abreu, Adriana Trópia de; Júnior, Hermínio Arias Nalini; Roeser, Hubert Mathias Peter; Santiago, Aníbal da Fonseca

doi:10.1007/s11356-019-07119-1

Cited by 21 publications

(11 citation statements)

References 34 publications

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“…DNA from known DIRM genera, such as Geobacter and Geothrix, was found in sediments of the Doce River and its tributary the Carmo River after the Fundão Dam burst [93,94], but it was not shown if they were actively reducing Fe(III) minerals in the river sediments. Although the bottom sediments of the Gualaxo do Norte River stretch impacted by tailings showed very small TOC values [54], the downstream Doce River is impacted by the discharge of untreated sewage [59,60]. Jardim et al [59] estimated that untreated sewage of approximately 870,000 people was discharged into the Doce River mainstream and tributaries, contributing an estimated 8 tons of organic N and 2.2 tons of organic P per day to the watershed, which led to eutrophication and recurrent cyanobacterial blooms before dam burst [59].…”

Section: Significance Of Dirms In the Context Of Riverine Sediments Enriched In Tailingsmentioning

confidence: 90%

“…Currently, the most studied species belong to the bacterial genera Geobacter and Shewanella [5]. ing oxidizing conditions in areas highly affected by tailings [54]. The mineral composition of the Fundão Dam tailings was 45-64% quartz (SiO 2 ), 24-31% hematite, 3.8-16.0% goethite, 1.4-5.1% kaolinite (Al 2 Si 2 O 5 (OH) 4 ), 0.6-1.0% magnetite, and 1.9-2.4% biotite (K(Fe 2+ /Mg) 2 (Al/Fe 3+ /Mg)([Si/Al]Si 2 O 10 )(OH/F) 2 ) [53].…”

Section: Introductionmentioning

confidence: 99%

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Dissimilatory Iron-Reducing Microorganisms Are Present and Active in the Sediments of the Doce River and Tributaries Impacted by Iron Mine Tailings from the Collapsed Fundão Dam (Mariana, MG, Brazil)

et al. 2021

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On November 5, 2015, a large tailing deposit failed in Brazil, releasing an estimated 32.6 to 62 million m3 of iron mining tailings into the environment. Tailings from the Fundão Dam flowed down through the Gualaxo do Norte and Carmo riverbeds and floodplains and reached the Doce River. Since then, bottom sediments have become enriched in Fe(III) oxyhydroxides. Dissimilatory iron-reducing microorganisms (DIRMs) are anaerobes able to couple organic matter oxidation to Fe(III) reduction, producing CO2 and Fe(II), which can precipitate as magnetite (FeO·Fe2O3) and other Fe(II) minerals. In this work, we investigated the presence of DIRMs in affected and non-affected bottom sediments of the Gualaxo do Norte and Doce Rivers. The increase in Fe(II) concentrations in culture media over time indicated the presence of Fe(III)-reducing microorganisms in all sediments tested, which could reduce Fe(III) from both tailings and amorphous ferric oxyhydroxide. Half of our enrichment cultures converted amorphous Fe(III) oxyhydroxide into magnetite, which was characterized by X-ray diffraction, transmission electron microscopy, and magnetic measurements. The conversion of solid Fe(III) phases to soluble Fe(II) and/or magnetite is characteristic of DIRM cultures. The presence of DIRMs in the sediments of the Doce River and tributaries points to the possibility of reductive dissolution of goethite (a-FeOOH) and/or hematite (a-Fe2O3) from sediments, along with the consumption of organics, release of trace elements, and impairment of water quality.

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Section: Significance Of Dirms In the Context Of Riverine Sediments Enriched In Tailingsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Dissimilatory Iron-Reducing Microorganisms Are Present and Active in the Sediments of the Doce River and Tributaries Impacted by Iron Mine Tailings from the Collapsed Fundão Dam (Mariana, MG, Brazil)

et al. 2021

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“…No caso de Mariana, mudanças físicas e químicas ocorreram nas propriedades dos sedimentos nas áreas afetadas, situação evidenciada pelas concentrações de Fe, matéria orgânica e predomínio da fração de sedimentos finos (Reis et al, 2020). Ademais, um grande acúmulo de resíduos ocorreu na bacia do rio Doce (Francini-Filho et al, 2019).…”

Section: Impactos Ambientais Nos Ecossistemas Naturais E áReas Antróp...unclassified

“…Ademais, os metais pesados oriundos do rejeito de mineração conferem um maior risco de progressão de doenças cardiovasculares, situação que demanda o monitoramento dos indivíduos afetados (Valenti & Garner, 2019). Apesar de a bacia do rio Doce apresentar contaminação por metais pesados (As, Ba, Co, Cu, Cr, Ni e Zn) antes do rompimento da barragem, verifica-se a existência de um risco carcinogênico e alterações das propriedades físico-químicas dos sedimentos com o rompimento da barragem (Davila et al, 2020, Reis et al, 2020. Oliveira et al (2019a) enfatizam que os impactos decorrentes do rompimento da barragem não se limitam somente à população diretamente afetada, mas se refletem em toda a bacia hidrográfica em função da contaminação das águas, impossibilidade de consumo, propagação de doenças de veiculação hídrica e recrudescimento de outros problemas de saúde, além dos prejuízos à saúde mental.…”

Section: Impactos à Saúde Humanaunclassified

“…Tal situação afeta adversamente todos os compartimentos ambientais e a sociedade. Os danos envolvem a contaminação do meio físico, perdas humanas, desabrigados, perda de qualidade da água, prejuízos à saúde e/ou agravamento de quadros clínicos, perecimento de espécies, entre outros (IBAMA, 2015;Silva Júnior et al, 2018;Omachi et al, 2018;Freitas et al, 2019;Losekan et al, 2020;Reis et al, 2020).…”

Section: Introductionunclassified

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Relações entre saúde e ambiente: potenciais impactos decorrentes do rompimento de barragens de rejeitos – uma revisão da literatura nos casos de Mariana e Brumadinho, MG

Silva

Fushita²,

Mininel³

et al. 2022

Desenvolv. Meio Ambiente

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A mineração pode resultar em impactos adversos para os ecossistemas naturais e saúde humana. Tendo em conta os graves rompimentos que ocorreram recentemente no Brasil (nos municípios de Mariana e de Brumadinho, no estado de Minas Gerais) e a relação existente entre saúde e meio ambiente, o presente trabalho buscou levantar, por meio de uma revisão bibliográfica, os impactos desencadeados pelo rejeito de mineração sobre a saúde humana e ecossistemas naturais. Os impactos ambientais implicaram diretamente na alteração do metabolismo e funcionamento dos ecossistemas naturais, devido à contaminação dos compartimentos ambientais e dos prejuízos à biodiversidade. Quanto à saúde humana, foram evidentes os riscos de intoxicação, prejuízos à saúde mental, agravos de doenças existentes, arboviroses e zoonoses. Os resultados deste estudo podem contribuir para o estabelecimento de estratégias e formulação de políticas públicas que visem a reversão do cenário encontrado.

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Water and Sediment Quality in the Coastal Zone Around the Mouth of Doce River After the Fundão Tailings Dam Failure

Richard

Estrada²,

Bechtold

et al. 2020

Integr Envir Assess & Manag

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Fundão dam (Minas Gerais, Brazil) breached on 5 November 2015, releasing 50 million m³ of Fe ore tailings and dam materials into the upper Doce River system. The tailings travelled 670 km along the river system to the ocean. Starting on 17 November 2015, 6 days before the tailings reached the Doce River mouth, a water quality monitoring program with a daily sampling schedule was implemented by Samarco Mineração S.A. (Samarco) to assess the impacts on marine water and sediment quality. Between November 2015 and August 2017 water and sediment quality were monitored at 28 locations offshore from the Doce River mouth. The sampling areas were grouped by hydrological and metocean season (i.e., rainy and dry seasons and wave and wind climates), distance from the river mouth (<5 km, >5 km and within a Marine Protected Area), and water depth. The data were compared to the Brazilian water quality standards and prebreach conditions. Statistical tests were conducted to evaluate temporal and spatial trends and patterns. For the water quality parameters of relevance (total suspended solids, turbidity, total and dissolved Fe, Al, and Mn), pulses of concentration increases were observed right after the arrival of the plume in the coastal zone and during the subsequent rainy seasons. Exceedances of prebreach conditions were more frequent closer to the Doce River mouth. During the dry season, concentrations tended to decrease, reaching prebreach levels for a number of parameters, with small short‐term pulses associated with metocean factors. For sediment quality parameters of relevance (particle size, Fe, Al, and Mn), Fe was the only one that clearly resulted from the dam breach, which was mediated by river influence and oceanographic factors affecting particle size distribution. Results indicated that the Fundão dam failure did affect water and sediment quality in the Atlantic Ocean, with greater impacts closer to the river mouth and immediately after the arrival of the tailings plume, with concentrations gradually returning to preevent levels over time. Integr Environ Assess Manag 2020;16:643–654. © 2020 SETAC

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Geochemical evaluation of bottom sediments affected by historic mining and the rupture of the Fundão dam, Brazil

Cited by 21 publications

References 34 publications

Dissimilatory Iron-Reducing Microorganisms Are Present and Active in the Sediments of the Doce River and Tributaries Impacted by Iron Mine Tailings from the Collapsed Fundão Dam (Mariana, MG, Brazil)

Dissimilatory Iron-Reducing Microorganisms Are Present and Active in the Sediments of the Doce River and Tributaries Impacted by Iron Mine Tailings from the Collapsed Fundão Dam (Mariana, MG, Brazil)

Relações entre saúde e ambiente: potenciais impactos decorrentes do rompimento de barragens de rejeitos – uma revisão da literatura nos casos de Mariana e Brumadinho, MG

Water and Sediment Quality in the Coastal Zone Around the Mouth of Doce River After the Fundão Tailings Dam Failure

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