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

Applied Geochemistry, Год журнала: 2023, Номер 152, С. 105644 - 105644

Опубликована: Март 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.

Язык: 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, Год журнала: 2021, Номер 803, С. 149883 - 149883

Опубликована: Авг. 25, 2021

Язык: 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, Год журнала: 2021, Номер 19(4), С. 417 - 428

Опубликована: Окт. 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.

Язык: 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, Год журнала: 2021, Номер 809, С. 151157 - 151157

Опубликована: Окт. 25, 2021

Язык: 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, Год журнала: 2022, Номер 832, С. 154878 - 154878

Опубликована: Март 29, 2022

Язык: Английский

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

The Science of The Total Environment, Год журнала: 2022, Номер 834, С. 155285 - 155285

Опубликована: Апрель 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.

Язык: Английский

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

Environmental Science and Pollution Research, Год журнала: 2022, Номер 30(6), С. 13945 - 13959

Опубликована: Дек. 23, 2022

Язык: 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, Год журнала: 2023, Номер 448, С. 130828 - 130828

Опубликована: Янв. 18, 2023

Язык: Английский

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Impacts of a tailings dam failure on water quality in the Doce river: The largest environmental disaster in Brazil

Journal of Trace Elements and Minerals, Год журнала: 2023, Номер 5, С. 100084 - 100084

Опубликована: Июнь 25, 2023

On November 5, 2015, the Fundão Dam, owned by Samarco Mineração SA, experienced a catastrophic failure, releasing approximately 55 to 62 million m3 of mining ore waste into Doce River. This event had severe consequences as River serves vital source water and food for numerous communities. Evaluate spatiotemporal distribution parameters before, during, after failure tailings dam, with goal support management restoration quality. The study utilizes long historical series data from 1997 2018. In this study, 13,916 measurements variables including HCO3−, Mg2+, Ca2+, SO42−, pH, EC, metal(oids) such Fe, Mn, As, Cu, Ba, Pb, Zn, Cd, Cr, Ni were compiled. These collected 2018 investigate impact dam rupture. resulted in an increase high turbidity events total suspended solids (TSS), leading decline Kruskal-Wallis test revealed homogenization effect along river watershed caused accident, particularly Ni, coliforms. Additionally, there was change seasonal PO43−, NH4+, Na+, Zn. factor analysis identified four main factors: i) electrical conductivity (37.55%) indicative weathering processes lithotypes; ii) Fe+Mn (As, Ni) (15.89%) associated regional geology; iii) coliforms, NO3−, PO43− (9.39%) linked anthropogenic influences river; iv) K+, Cl− (8.22%) represented domestic industrial sewage discharge well marine environment lower sector rupture significantly altered quality River, relation metal(oids), three years disaster. presence bottom sediments creates environmental liability it can be remobilized human activities or extreme weather events, further impacting

Язык: Английский

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Ex-post impact assessment on a large environmental disaster

Environmental Challenges, Год журнала: 2024, Номер 15, С. 100889 - 100889

Опубликована: Март 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.

Язык: Английский

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