6 documents found, page 1 of 1
Geochemistry and Mineralogy of Auriferous Tailings and Their Potential for Reus...
Lemos, M.; Valente, T.; Marinho Reis, P.; Fonseca, R.; Pantaleão, J.P.; Guabiroba, F.; Gregorio Filho, J.; Magalhães, M.; Afonseca, B.; Silva, A.R.Since the mid-nineteenth century, gold ores, mainly hosted in sulfides, have been processed at metallurgical plants located in Nova Lima, Brazil. The generated wastes have been accumulated over the years in tailings dams or in piles. These materials represent wasted from old circuits, as well as from plants still in production. In this study, geochemical, mineralogical, 3D modelling, and metallurgical analyses ...
Adding Value to Mine Waste through Recovery Au, Sb, and As: The Case of Aurifer...
Lemos, M.; Valente, T.; Marinho Reis, P.; Fonseca, R.; Guabiroba, F.; Mata Filho, J.G.; Magalhães, M.F.; Delbem, I.D.; Rebelo Diório, G.From the colonial era to modern times, gold mining has played a crucial role in shaping Brazil’s economy, culture, and landscape, particularly in the Iron Quadrangle region. Therefore, resulting waste has accumulated in tailings structures, either from deactivated circuits or plants still in production. The present study reveals the potential assessed based on a set of metallurgical tests, assuming specific sce...
Hydrochemistry, Elements Distribution and Their Potential Recoveries in Gold Me...
Lemos, M.; Valente, T.; Marinho Reis, P.; Braga, A.S.; Fonseca, R.; Guabiroba, F.; Mata Filho, J.G.; Magalhães, M.F.; Silva, A.R.; Bhering, A.P.Recovering metals from mining wastewater is important in minimizing environmental pollution and maximizing resource efficiency. For this, a characterization step and understanding the oc-currence of metals and other compounds are essential. The present study focused on waters from different mining dams containing metals such as Au, Cu, Ni, Zn, and sulfates, located in the Iron Quadrangle region, (Brazil). The r...
Sensitivity analysis and pre-feasibility of reprocessing Au from a tailings dam...
Lemos, M.; Valente, T.; Marinho Reis, P.; Fonseca, R.As historical waste has accumulated in dams, the interest in studying the feasibility of reusing mining tailings has grown, offering both environmental and economic advantages. However, given the unique characteristics of each site, conducting site-specific assessments is crucial. Building on a detailed evaluation of the Cocoruto Dam in Nova Lima, Minas Gerais, this study presents a technical feasibility and fi...
Deposição atmosférica de poeiras e níveis de elementos traço numa cidade indust...
Oliveira, A. R.; Rangel, M. J.; Noack, Y.; Pinto, M. Cabral; Dinis, P.; Gomes, E.; Costa, J.; Costa, C.; Terroso, D.; Rocha, F.; Santos, J. F.O presente estudo pretendeu (i) identificar padrões geoquímicos espaciais e temporais na deposição atmosférica, e (ii) avaliar potenciais contribuições de fontes locais e alóctones para a composição química das poeiras atmosféricas no concelho de Estarreja. Dois coletores foram colocados em áreas exteriores de duas escolas localizadas poucos quilómetros a sul da zona industrial. A recolha das amostras foi reali...
Atmospheric dust deposition and levels of trace elements in an industrial city ...
Oliveira, Ana Rita; Rangel, M.; Noack, Y.; Gomes, E.; Costa, J. J.; Cabral Pinto, Marina; Rocha, Fernando Joaquim; Santos, José Francisco; Antunes, M.This study was performed to examine the influence of an industrial complex, and the high traffic volume associated with it, on the atmospheric dust deposition in a Mediterranean setting. The most frequently used device for collecting total atmospheric wet and dry deposition consists of a funnel connected to a receiving bottle. Two deposition collectors were placed in exterior areas of two schools (Escola Básica...