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Integrated assessment of environmental risk in AMD-affected mine waste: mineral...
Barroso, Ana; Valente, Teresa Maria Fernandes; Antunes, Isabel Margarida Horta Ribeiro; Cerqueira, Ângela; Gomes, Patrícia; Henriques, Renato F.The long-term environmental legacy of mining in sulfide-rich regions remains a critical concern due to the persistent generation of acid mine drainage (AMD) and the mobilization of potentially toxic elements (PTEs). This study presents a comprehensive, site-specific assessment of mine waste from two contrasting geochemical zones, Nuestra Señora del Carmen (NSC) and Volta Falsa (VF), within the historically unde...
Secondary mineralogy in mine waste: geochemical and environmental controls acro...
Valente, Teresa Maria Fernandes; Barroso, A.; Marinho Reis, A. Paula; Gomes, P.; Antunes, Isabel Margarida Horta Ribeiro[Excerpt] The mineralogical evolution of mine waste under supergene conditions reflects complex interactions among the original paragenesis, climatic regime, environmental setting, and anthropogenic influences resulting from exploitation, beneficiation, and closure methods. This study characterizes secondary mineral assemblages formed in diverse mine waste environments, using case studies from northern to south...
Acid mine drainage and waste dispersion in legacy mining sites: an integrated a...
Barroso, Ana; Henriques, Renato; Cerqueira, Ângela; Gomes, Patrícia; Antunes, Isabel Margarida Horta Ribeiro; Marinho Reis, A. PaulaAbandoned mines pose environmental risks due to the accumulation of sulfide-rich waste, which generates acid mine drainage and produces fine-grained, unconsolidated materials that, when deposited on steep slopes, accelerate erosion and contaminant transport. This study assesses the environmental impact of the Trimpancho mining complex by integrating UAV-based photogrammetry, water analysis, and mine waste chara...
Advanced monitoring of abandoned mining sites with High-Resolution UAV Technology
Barroso, Ana Raquel; Henriques, Renato F.; Cerqueira, Ângela; Gomes, Patrícia; Antunes, Isabel Margarida Horta Ribeiro; Marinho Reis, A. Paula[Excerpt] In the past decade, unmanned aerial vehicles (UAVs), or drones, have become invaluable tools in the mining industry, supporting applications ranging from mineral exploration to environmental remediation. When equipped with high resolution image sensors, UAVs enable high spatial and temporal resolution surveying, making them particularly effective for monitoring abandoned mining sites. This paper prese...
Improved acidity estimation by integrating comprehensive dissolved metal(oid)s ...
Barroso, Ana Raquel; Cravotta III, Charles A.; Gomes, Patrícia; Antunes, Isabel Margarida Horta Ribeiro; Marinho Reis, A. PaulaThis study introduces a geochemical modeling approach using PHREEQC to improve the accuracy of acidity estimates in waters influenced by acid mine drainage (AMD). AMD, common in regions like the Iberian Pyrite Belt, is characterized by low pH and high concentrations of metals, sulfate and acidity. Conventional methods, such as net acidity, often underestimate actual acidity by excluding additional metal(oid) s ...
A data-driven high-accuracy modelling of acidity behavior in heavily contaminat...
Barroso, Ana; Valente, Teresa Maria Fernandes; Marinho Reis, A. Paula; Antunes, Isabel Margarida Horta RibeiroAccurate estimation of water acidity is essential for characterizing acid mine drainage (AMD) and designing effective remediation strategies. However, conventional approaches, including titration and empirical estimation methods based on iron speciation, often fail to account for site-specific geochemical complexity. This study introduces a high-accuracy, site-specific empirical model for predicting acidity in ...
Copiapite group: occurrence and properties in mining contamination scenarios
Barroso, Ana; Valente, Teresa Maria Fernandes; Antunes, Isabel Margarida Horta Ribeiro; Marinho Reis, A. Paula; Neves, Isabel C.The copiapite group shows a wide range of chemical compositions, allowing the identification of several mineral phases (e.g., aluminocopiapite and magnesiocopiapite). These minerals, typically observed in mining environments, are formed from evaporation and acid mine drainage (AMD) precipitation. In these areas, the copiapite has been studied to comprehend its ability to store some potentially toxic elements (P...
Variscan plutonism in the geodynamic evolution of the central Iberian zone of P...
Cruz, Cláudia; Sant’Ovaia, Helena; Martins, Helena C. B.; Antunes, Isabel Margarida Horta Ribeiro; Rocha, Armando; Noronha, FernandoA multidisciplinary analysis of the Pennsylvanian Castelo Branco pluton of Central Iberian Zone (Iberian Variscan belt) was made, focusing on its magnetic behavior and fabric, microstructures, microfractures, and radiometric and gravimetric anomalies. The findings reveal that the Castelo Branco pluton is an ilmenite-type granite, characterized by low magnetic susceptibility values. The petrographic observations...
Water resources availability on a river watershed in a relevant mineral provinc...
Freitas, Alex Rodrigues de; Paula, Rodrigo Sérgio de; Antunes, Isabel Margarida Horta RibeiroThe watershed of the Peixe River lies in central Minas Gerais state, close to Belo Horizonte city, a densely populated area. The area is located in the geological context of Quadrilátero Ferrífero, one of the most prominent mineral provinces in Brazil. To better recognize surface and groundwater availability, some methodologies have been applied to evaluate the minimal surface flow rates, groundwater recharge, ...
Using elemental concentrations and dust loadings as metrics of human exposure t...
Marinho Reis, A. Paula; Afonso, inês; Ettler, Vojtěch; Cox, Siobhan; Mihaljevič, Martin; Carey, Manus; Noack, Yves[Excerpt] Due to the hand-to-mouth activities frequently observed among the youngest children, they are likely to ingest higher amounts of indoor dust than adults. Since pre-schoolers are prone to exposure to potentially toxic elements (PTEs) through the ingestion route, characterizing human exposure within kindergarten microenvironments is paramount for children who spend considerable time in school. Ergo, a s...