Socio-Environmental Risks Linked with Mine Tailings Chemical Composition: Promoting Responsible and Safe Mine Tailings Management Considering Copper and Gold Mining Experiences from Chile and Peru

Toxics, Год журнала: 2023, Номер 11(5), С. 462 - 462

Опубликована: Май 16, 2023

There is a need to define mine tailings in clear, precise, multidisciplinary, transdisciplinary, and holistic manner, considering not only geotechnical hydraulic concepts but also integrating environmental geochemical aspects with implications for the sustainability of mining. This article corresponds an independent study that answers questions concerning definition socio-environmental risks linked chemical composition by examining practical experience industrial-scale copper gold mining projects Chile Peru. Definitions analysis key responsible management tailings, such as characterization metallic–metalloid components, non-metallic metallurgical reagents, risk identification, among others, are presented. Implications potential impacts from generation acid rock drainage (ARD) discussed. Finally, concludes potentially toxic both communities environment, cannot be considered inert innocuous materials; thus, require safe, controlled, application most high standards, use best available technologies (BATs), applicable practices (BAPs), implementation (BEPs) avoid impact due accidents or failure storage facilities (TSFs).

Язык: Английский

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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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Mechanical grinding kinetics and particle packing novel characterization of iron ore tailings as inert filler for cement mortar

Journal of Building Engineering, Год журнала: 2023, Номер 78, С. 107558 - 107558

Опубликована: Авг. 12, 2023

Язык: Английский

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Assessment of water quality based on statistical analysis of physical-chemical, biomonitoring and land use data: Manso River supply reservoir

The Science of The Total Environment, Год журнала: 2023, Номер 912, С. 169554 - 169554

Опубликована: Дек. 23, 2023

Язык: Английский

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Groundwater flow and transport of metals under deposits of mine tailings: A case study in Brumadinho, Minas Gerais, Brazil

Case Studies in Chemical and Environmental Engineering, Год журнала: 2024, Номер 9, С. 100690 - 100690

Опубликована: Март 13, 2024

The deposits of mine tailings can be a source groundwater contamination by metals. In this study, we simulated the concentrations iron, manganese and aluminum in potentially affected drainage from located Brumadinho (Brazil). aim was to verify whether observed region attributed these drainages. simulation used FREEWAT graphical interface, which incorporates MODFLOW model, hydraulic properties existing unconfined confined aquifers, spatial distribution tailings' deposits, dissolved iron measured drilled wells. period 20 years, starting 2019 after collapse B1 dam Córrego do Feijão Vale, S.A. modeling results revealed plumes metal progressively less dispersed over time, aquifer, increased aquifer. both aquifers were generally lower than legal limits imposed for human consumption, although some areas vicinity had higher those limits, especially widened time. most relevant result revelation that contribution wells might have not exceeded 1%. This is important management standpoint, because monitoring anthropogenic cases (where rock weathering dominates chemistry) becomes more challenging.

Язык: Английский

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A partial least squares-path model of environmental degradation in the Paraopeba River, for rainy seasons after the rupture of B1 tailings dam, Brumadinho, Brazil

The Science of The Total Environment, Год журнала: 2022, Номер 851, С. 158248 - 158248

Опубликована: Авг. 24, 2022

Язык: Английский

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The Accuracy of Land Use and Cover Mapping across Time in Environmental Disaster Zones: The Case of the B1 Tailings Dam Rupture in Brumadinho, Brazil

Sustainability, Год журнала: 2023, Номер 15(8), С. 6949 - 6949

Опубликована: Апрель 20, 2023

The rupture of a tailings dam causes several social, economic, and environmental impacts because people can die, the devastation caused by debris mud waves is expressive released substances may be toxic to ecosystem humans. There were two major failures in Minas Gerais state, Brazil, last decade. first was 2015 city Mariana second 2019 municipality Brumadinho. extent land use cover changes derived from those collapses an expression their impacts. Thus, knowing after these disasters essential help repair or mitigate degradation. This study aimed diagnose that occurred failure B1 Brumadinho affected Ferro-Carvão stream watershed. In addition objective, there intention investigating impact image preparation, as well spatial spectral resolution on classification’s accuracy. To accomplish goals, visible near-infrared bands Landsat (30 m), Sentinel-2 (10 PlanetScope Dove (4.77 m) images collected between 2018 2021 processed Google Earth Engine platform. Pixel Reduction Median tool used prepare record images, then random forest algorithm detect under different resolutions provide corresponding measures results showed affects accuracy, but also selected all capable accurately classifying watershed over time. After failure, mining/tailings areas increased impacted zone stream, while native forest, pasture, agricultural lands declined, exposing deterioration. environment recovered subsequent years (2020–2021) due removal mobilization.

Язык: Английский

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Scenarios of environmental deterioration in the Paraopeba River, in the three years after the breach of B1 tailings dam in Brumadinho (Minas Gerais, Brazil)

The Science of The Total Environment, Год журнала: 2023, Номер 891, С. 164426 - 164426

Опубликована: Май 24, 2023

The collapse of B1 dam at the Córrego do Feijão mine Vale, S.A., located in Ferro-Carvão stream watershed (Brazil), released 11.7 Mm3 tailings rich iron and manganese, 2.8 entered Paraopeba River 10 km downstream. Seeking to predict evolution environmental deterioration river since break on January 25, 2019, present study generated exploratory normative scenarios based predictive statistical models, proposed mitigating measures subsides ongoing monitoring plans. segmented into three sectors: "anomalous" for distances ≤63.3 from site, "transition" (63.3-155.3 km), "natural" (meaning unimpacted by 2019; >155.3 km). predicted a spread until reaching sector rainy season 2021, their containment behind weir Igarapé thermoelectric plant sector, dry season. Besides, they water quality changes vigor riparian forests (NDVI index) along River, season, restriction these impacts indicated exceedances chlorophyll-a period 2019-January 2022, but not exclusively caused rupture as also occurred areas affected accident. Conversely, manganese clearly flagged failure, persist. most effective measure is likely dredging currently it represents solely 4.6 % what has river. Monitoring paramount update system enters route towards rewilding, must include sediments, vegetation, dredging.

Язык: Английский

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Spatial and Temporal Study of Supernatant Process Water Pond in Tailings Storage Facilities: Use of Remote Sensing Techniques for Preventing Mine Tailings Dam Failures

Sustainability, Год журнала: 2023, Номер 15(6), С. 4984 - 4984

Опубликована: Март 10, 2023

Considering the global impact on society due to tailings storage facilities (TSFs) accidents, this article describes a study monitor mine management and prevent mining dam failures, considering analysis of different TSFs real cases. The spatial temporal dynamic behavior supernatant process water pond is studied as critical issue, using remote sensing techniques based multispectral satellite imagery. To understand current state art, brief description engineering studies for control in presented. This research considers main method practical cases with use interpretation images from Sentinel 2 sensor. In addition, tools such Geographical Information System (GIS) Google Earth Engine (GEE) implemented, well application some spectral indices NDWI joint (i) NDVI, (ii) mNDWI, (iii) EVI. Real TSF are analyzed, including failures Jagersfontain South Africa Williamson Tanzania. Finally, concludes that size, location, variability within has direct safety possible potential risk physical instability dams.

Язык: Английский

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Hydrologic Response to Land Use and Land Cover Change Scenarios: An Example from the Paraopeba River Basin Based on the SWAT Model

Water, Год журнала: 2023, Номер 15(8), С. 1451 - 1451

Опубликована: Апрель 7, 2023

Human land use cover changes (LULCCs) can cause impacts on watershed lands and water resources. The regions with conflict suffer more intense erosion processes due to their high slope drainage density. study intends evaluate scenarios an absence of verify if it contribute reductions in surface runoff, avoiding the carriage tailings river channels. In study, SWAT model was used hydrological modeling Paraopeba River affected by rupture. results show that able reproduce flow data good very performances. quality indicators calibration step were NSE = 0.66, R2 0.69, PBIAS 5.2%, RSR 0.59, validation, 0.74, 0.77, 13.5%, 0.51. LULCC from 2000 2019 led a 70% increase lateral runoff (LATQ) 74% decrease aquifer groundwater. scenario capability no reduce 37% infiltration 265%, minimizing point diffuse contamination channel.

Язык: Английский

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