Geochemistry and contamination of sediments and water in rivers affected by the rupture of tailings dams (Brumadinho, Brazil)

Applied Geochemistry, Journal Year: 2023, Volume and Issue: 152, P. 105644 - 105644

Published: March 25, 2023

Understanding the geochemistry and contamination of rivers affected by rupture tailings dams is paramount to emergency water resources management. This needs long-term monitoring tailings, sediments along river, understanding how interact physically geochemically with natural flowing water. An effort this kind uncommon because its cost opportunity. The purpose study was help filling gap using B1 dam (Brumadinho, Minas Gerais, Brazil, 25 January 2019) as example. To accomplish objective, 31 parameters sediment were monitored weekly for three years after event, spanning impacted non-impacted sectors Paraopeba River, including a reservoir that attenuating propagation downstream. Using hierarchical clustering analysis, assembled into groups. Associations between within groups pointed processes drivers controlling concentrations Fe, Mn, Al, As, Pb P in results suggested reductive dissolution Pb- Mn-bearing minerals key process. In rainy period, dissolved Mn sector raised exponentially temperature increase; reservoir, they showed episodic peaks triggered thermal stratification-related pH decreases. general, total > indicating predominant particle transport. Besides, higher Al season, sector. dry stream flow-controlled resuspension desorption Fe from sand grains raising their concentrations. declining trend probably related erosion acid soils watershed caused gradual increases P, desorbed clays silts. main conclusion left strong fingerprint especially which lasts keeps use River suspended.

Language: Английский

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Environmental quality assessment in a marine coastal area impacted by mining tailing using a geochemical multi-index and physical approach

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 803, P. 149883 - 149883

Published: Aug. 25, 2021

Language: Английский

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Long-term contamination of the Rio Doce estuary as a result of Brazil’s largest environmental disaster

Perspectives in Ecology and Conservation, Journal Year: 2021, Volume and Issue: 19(4), P. 417 - 428

Published: Oct. 1, 2021

The Rio Doce basin in SE Brazil was critically impacted November 2015 by the spillage of millions tons mining waste. In estuary, tailings removed nearly 30% estuarine benthic species and rapidly increased sediment contamination metal(loid)s. Short-term impact assessments from to 2017 revealed severe ecological effects estuary linked deposited tailings, but long-term patterns their risks are yet unclear. We analyzed metal(loid) up 4.2 years after short-term impacts 2015. found that impact, As, Cr, Cu, Ni concentrations were still above threshold effect levels toxicity, while Cd Pb exceeded probable levels. Although contaminants often show a stable temporal trend, sedimentary contents continuously background values for estuary. risk analysis suggested high enough cause adverse biological effects, supporting hypothesis there is chronic ecosystem long-term. Our data suggests without recovering actions, will likely be sink upper river basin. However, this capacity limited due sensibility Fe oxyhydroxides reductive dissolution release, leading aquatic biota with potentially negative consequences human health decades come.

Language: Английский

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Prognosis of metal concentrations in sediments and water of Paraopeba River following the collapse of B1 tailings dam in Brumadinho (Minas Gerais, Brazil)

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 809, P. 151157 - 151157

Published: Oct. 25, 2021

Language: Английский

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Ecotoxicological impacts of the Fundão dam failure in freshwater fish community: Metal bioaccumulation, biochemical, genetic and histopathological effects

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 832, P. 154878 - 154878

Published: March 29, 2022

Language: Английский

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Water security threats and challenges following the rupture of large tailings dams

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 834, P. 155285 - 155285

Published: April 18, 2022

The rupture of mine-tailings dams can severely contaminate rivers, because released tailings interact with water for years keeping contaminant concentrations high. general purpose this study was to examine the B1 dam in Ferro-Carvão stream (municipality Brumadinho, state Minas Gerais, Brazil), which occurred 25 January 2019 and contaminated main course (Paraopeba River) 2.8 Mm3 metal-rich tailings. specific assess percentage non-conforming following event, considering Normative Deliberation COPAM/CERH-MG no. 1. results showed aluminum, iron, manganese, lead, phosphorus turbidity concentrations, clearly above pre-rupture averages, especially rainy period. catastrophe triggered suspension Paraopeba River as drinking source Metropolitan Region Belo Horizonte (BHMR; 6 million people). Since then, supply BHMR became an everyday challenge management authorities, represented a 30% share. Mitigation measures are therefore urgently needed. As complementary objective study, we aimed verify possibility restore through conventional treatment. treatability assessed by Raw Water Quality Index dry periods separate. suggested lift up period, improving regional security. Considering huge dataset on is standing, our generalizable similar events sparser information.

Language: Английский

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Scientometric analysis on the review research evolution of tailings dam failure disasters

Environmental Science and Pollution Research, Journal Year: 2022, Volume and Issue: 30(6), P. 13945 - 13959

Published: Dec. 23, 2022

Language: Английский

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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, Journal Year: 2023, Volume and Issue: 448, P. 130828 - 130828

Published: Jan. 18, 2023

Language: Английский

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Ex-post impact assessment on a large environmental disaster

Environmental Challenges, Journal Year: 2024, Volume and Issue: 15, P. 100889 - 100889

Published: March 7, 2024

Impact assessments following environmental disasters must be quick and in accessible language so that decision-makers affected populations are aware of the main impacts can target recovery measures. After collapse Fundão dam (Minas Gerais, Brazil) November 2015, an extensive monitoring program was implemented to understand aquatic situation associated biodiversity status after spill iron ore tailings a large highly populated watershed, reached Atlantic Ocean along southeast Brazilian coast. A programme faced several challenges, including volume data analysed, which difficult objective diagnosis communication between technical teams decision makers. In this context, impact matrix proposed as tool for assessing proxy results summarizing obtained. The Matrix is interaction adaptation consists quantifying using pre-defined criteria scores. Expert panels assessed link measures objectives by scoring specific criteria. As matrix, made up two intersecting axes: identified compartments (whether abiotic or biotic). final summing score on each intersections. supervised approach focused provide relatively simple apply and, when carried out periodically parallel with programme, it makes possible observe temporal trends evolution environment event causing impact. also serve feedback itself, used adaptive management approach.

Language: Английский

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Potentially toxic elements in iron mine tailings: Effects of reducing soil pH on available concentrations of toxic elements

Environmental Research, Journal Year: 2022, Volume and Issue: 215, P. 114321 - 114321

Published: Sept. 20, 2022

Language: Английский

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