Coal Mining
Mostrando 1-12 de 77 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. De modernidades periféricas: feudalidad y favor en artes de la “Belle Époque” chilena
RESUMO Neste artigo utilizo “As ideias fora do lugar”, de Roberto Schwarz, para estudar a sobrevivência da feudalidade e o favor, herdados do colonialismo ibérico, na “Belle Époque” chilena. No período, as desigualdades sociais adquiriram proporções hipertróficas pelo capital que as elites locais receberam da sua incursão na mineração do ca
Rev. Inst. Estud. Bras.. Publicado em: 10/01/2020
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3. Crescimento e teor de cromo em mamoneira cultivada em solo receptor de resíduos de curtume e carboníferos
RESUMO A produção de resíduos tem aumentado em proporção direta com a industrialização dos países. Sendo assim, a disposição adequada desses resíduos é uma questão largamente discutida entre os órgãos ambientais. Por isso, o objetivo deste trabalho foi estudar o efeito residual de adições sucessivas de resíduos de curtume e da mineração d
Eng. Sanit. Ambient.. Publicado em: 20/12/2019
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4. The spirit underneath: development, race and moral economy in Central Mozambique
Resumo Desde 2007, Tete, província central de Moçambique, passa por uma grande expansão econômica. Empresas multinacionais de mineração estão explorando um dos maiores - e praticamente intocados - depósitos de carvão do mundo. Liderados pela brasileira Vale, o bilionário e polêmico plano de investimento chamou a atenção de ONGs internacionais e
Vibrant, Virtual Braz. Anthr.. Publicado em: 28/11/2019
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5. Investigation of the Roof Presplitting and Rock Mass Filling Approach on Controlling Large Deformations and Coal Bumps in Deep High-Stress Roadways
Abstract Roadway deformation and coal bumps are major challenges for underground engineering. Taking the Lu'an mining district in Shanxi Province as an example, the failure mechanism of deep high-stress roadway was studied. Numerical simulations and the similar material test were performed to investigate the effect of the roof presplitting and rock mass fill
Lat. Am. j. solids struct.. Publicado em: 27/05/2019
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6. Thermal Behavior of Pyrite in the CO2 and N2 Atmosphere for Obtaining Pyrrhotite: A Magnetic Material
In the southern of Brazil the coal is composed of a large amount of pyrite (FeS2), an environmental problem for this region because the pyrite turns a waste. This work investigated the behavior of pyrite in CO2 and N2 atmospheres, aiming to identify better thermal treatment conditions of the pyrite waste that favor obtaining a material with magnetic properti
Mat. Res.. Publicado em: 18/10/2018
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7. Isolation, Characterization and Symbiotic Efficiency of Nitrogen-Fixing and Heavy Metal-Tolerant Bacteria from a Coalmine Wasteland
ABSTRACT: Areas affected by coal mining can be recovered by revegetation with leguminous plants associated with nitrogen-fixing bacteria. This study addressed the isolation and characterization of native nitrogen-fixing bacteria from coalmine wasteland under different vegetation restoration approaches using Macroptilium atropurpureum (DC) Urb and Vicia sativ
Rev. Bras. Ciênc. Solo. Publicado em: 13/09/2018
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8. Soil Macrofauna as Indicator of Environmental Recovery in a Mining Area
ABSTRACT This work aimed to characterize the composition of the soil macrofauna in non-mined and mined areas recovered with native vegetation, Eucalyptus dunnii Maiden and Acacia mearnsii De Wild. plantations, in a coal mine. Five areas were evaluated, namely, three non-mined areas and two mined and recovered areas. Six soil samples per area were collected
Floresta Ambient.. Publicado em: 13/09/2018
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9. Elemental composition of vegetables cultivated over coal-mining waste
ABSTRACT We assessed elemental composition of the liver in mice subjected to one-time or chronic consumption of the juice of vegetables cultivated in a vegetable garden built over deposits of coal waste. Lactuca sativa L. (lettuce), Beta vulgaris L. (beet), Brassica oleracea L. var. italica (broccoli) and Brassica oleracea L. var. acephala (kale) were collec
An. Acad. Bras. Ciênc.. Publicado em: 23/10/2017
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10. Reclamation of a Degraded Coal-Mining Area with Perennial Cover Crops
ABSTRACT: Studies addressing the potential of grass roots in improving the structural quality of constructed minesoils are not frequent in the literature, although they are essential for understanding the re-establishment of soil functions in the environment. The objective of this study was to quantify the root attributes of the species Urochloa humidicola,
Rev. Bras. Ciênc. Solo. Publicado em: 19/12/2016
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11. Litter Decomposition of Two Pioneer Tree Species and Associated Soil Fauna in Areas Reclaimed after Surface Coal Mining in Southern Brazil
ABSTRACT Decomposition of leaf litter from pioneer tree species and development of associated soil meso- and macrofauna are fundamental for rehabilitation processes in reclaimed coal mining areas. The aim of our study was to evaluate decomposition of Schinus terebinthifolius and Senna multijuga to answer three basic questions: (i) What type of leaf litter de
Rev. Bras. Ciênc. Solo. Publicado em: 03/11/2016
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12. Initial Recovery of Organic Matter of a Grass-Covered Constructed Soil after Coal Mining
ABSTRACT Revegetation is essential to improve the quality of constructed soils. This study investigated effects of perennial grasses on total organic carbon (TOC) stock, organic matter (OM) fractions and on quality of a recently constructed soil, after coal mining. Soil samples were collected from the 0.00-0.03 m layer two years after the beginning of the ex
Rev. Bras. Ciênc. Solo. Publicado em: 25/07/2016