Acid Mining Drainage
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Using static, kinetic and metal mobility procedures to evaluate possibilities of coal waste land disposal at Moatize Mine, Mozambique
Abstract Coal mine waste rocks produced during mining and beneficiation can affect the environment due to land degradation and acid mine drainage generation. However, proper characterization and treatment of mineral processing wastes creates options for safe disposal, enhancing the environmental performance. The aim of this study was to use static and kineti
REM, Int. Eng. J.. Publicado em: 2020-12
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2. Application of the fundamental parameter method to the assessment of major and trace elements in soil and sediments from Osamu Utsumi uranium mine by WDXRF
Abstract Wavelength dispersive X-ray fluorescence spectrometry (WDXRF) is a suitable technique for the characterization of contaminated mining sites, providing a quick and reliable screening for areas of significant contamination. This study established and validated a non-destructive methodology for quantitative simultaneous determination of major and minor
REM, Int. Eng. J.. Publicado em: 16/09/2019
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3. Effectiveness of Arsenic Co-Precipitation with Fe-Al Hydroxides for Treatment of Contaminated Water
ABSTRACT Wastewater treatment is a challenging problem faced by the mining industry, especially when mine effluents include acid mine drainage with elevated arsenic levels. Iron (hydr)oxides are known to be effective in removal of As from wastewater, and although the resulting compounds are relatively unstable, the presence of structural Al enhances their st
Rev. Bras. Ciênc. Solo. Publicado em: 29/03/2018
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4. Geochemistry of acid mine drainage from a coal mining area and processes controlling metal attenuation in stream waters, southern Brazil
Influência de drenagem ácida sobre a qualidade de água e sedimento foi investigada em uma área de mineração de carvão (sul do Brasil). A drenagem ácida mostrou pH entre 3,2 e 4,6 e elevadas concentrações de sulfato, As e metais, dos quais, Fe, Mn e Zn excederam os limites para emissão de efluentes da legislação brasileira. Arsênio também exced
An. Acad. Bras. Ciênc.. Publicado em: 14/05/2014
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5. Estimativa simultânea de parâmetros hidráulicos e de transporte em estéreis de mineração de urânio / Simultaneous estimation of hydraulic and transport parameters inwaste rock from uranium mining
The present work aims to simultaneously estimate the hydraulic and transport parameters related to the material of one of the waste rock piles (Waste Rock Pile 4) from the Poços de Caldas uranium mining and milling facility. Before performing the estimation, it was necessary to study the chemical species that are dissolved from this material by the climate
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2010
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6. Recuperação de urânio de rejeito de mina por meio de lixiviação alcalina / Recovery of uranium from mine wastes by alkaline leaching
Appropriate management of wastes is one of the most important environmental problems, particularly concerning the tailings of mining activities. Interim storage of the tailings at incorrect places pending treatment demands an urgent solution. The Osamu Utsumi Mine located in the city of Caldas, Minas Gerais, has faced such problem. The waste of the mine cons
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/04/2010
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7. Rejeito de mineração de carvão como adsorvente para remoção da acidez, Fe (III), Al (III) e Mn (II) em drenagem ácida
This study aimed the use of coal mining waste as a new adsorbent for H3O+ and removal of Al (III), Fe (III) and Mn (II) from acid mine drainage. Data from kinetic and equilibrium of the adsorption of H3O+ followed the pseudo second-order and Langmuir isotherm models. The maximum adsorption capacity of H3O+ was 316 mmol kg-1. The adsorbent removed 100% of Al
Química Nova. Publicado em: 2010
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8. Ensaios estáticos e cinéticos para a prevenção da geração de drenagem ácida de minas da mineração de carvão com escória de aciaria = Static and kinetic tests to prevent the generation of acid mine drainage from coal mining with steel slag / Static and kinetic tests to prevent the generation of acid mine drainage from coal mining with steel slag
A Drenagem Ácida de Mina (DAM) é proveniente da oxidação natural de materiais sulfetados quando em contato com o ar e com a água. Esse problema atinge, em alto grau, a mineração de carvão. Uma das tecnologias de prevenção da geração da DAM consiste no método de aditivos alcalinos. Assim, o objetivo do presente trabalho foi avaliar, em estudos de
Publicado em: 2010
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9. Alocação econômica de recursos naturais no contexto de bacia hidrográfica : aplicação na bacia do rio Sangão em Santa Catarina
The environmental impacts caused by natural resources exploration may cause damages to third parties, since these agents¿ actions harm the environment and, in some cases, make the existence of other activities unfeasible. This context includes coal mining and irrigated rice cropping. Coal mining and beneficiation make possible the contact between water and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2010
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10. Avaliação do reúso e tratamento de águas ácidas de minas de carvão pelo método NF-FADAT - Neutralização, Floculação e Flotação por Ar Dissolvido de Alta Taxa
A Drenagem Ácida de Minas (DAM) é um dos maiores problemas ambientais que enfrenta a mineração e extração de sulfetos metálicos e carvão mineral a nível mundial. Essas águas, oriundas da oxidação de minerais sulfetados presentes na matéria inorgânica (principalmente pirita), contêm altos teores de íons sulfato, metais pesados e acidez. A Regi
Publicado em: 2010
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11. Estudo da remoção de manganês de efluentes de mineração utilizando cal, calcário e dióxido de manganês / Study of manganese removal from mining effluent using lime, limestone and manganese dioxide
Manganese is a common component of acid mine drainage (AMD). Due to its high solubility over a wide pH range, it is notoriously difficult to remove it from contaminated waters. The AMD that occurs in Mineral Industrial Complex of Poços de Caldas (CIPC) which belongs to the Nuclear Industries of Brazil (INB), is due to the great amount of su
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/06/2009
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12. Arsenic mobilization from sulfidic materials from gold mines in Minas Gerais State
Acid drainage results from exposition of sulfides to the atmosphere. Arsenopyrite is a sulfide that releases arsenic (As) to the environment when oxidized. This work evaluated the As mobility in six sulfidic geomaterials from gold mining areas in Minas Gerais State, Brazil. Grained samples (<2 mm) were periodically leached with distilled water, during 70 day
Química Nova. Publicado em: 2008