Coal Mining
Mostrando 13-24 de 77 artigos, teses e dissertações.
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13. Rhizobia Isolated from Coal Mining Areas in the Nodulation and Growth of Leguminous Trees
ABSTRACT An alternative for recovery of areas degraded by coal mining is revegetation with rapidly growing leguminous trees, which often do not establish in low fertility soils. The objective of this study was to evaluate the efficiency of native rhizobia isolated from coal mining areas in the nodulation and growth of leguminous trees. We isolated 19 strains
Rev. Bras. Ciênc. Solo. Publicado em: 26/04/2016
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14. An Analysis of the Rate for Controlling, Monitoring and Supervision of Exploration and Mining Activities of Mineral Resources (TFRM)
Abstract Recently, the Brazilian media reported the withdrawal of the rate on profit from mining of coal and iron ore by the government of Australia. In Australia this rate was created in 2012 to finance social programs. However, due to the drop in the value of mineral commodities, the government has reversed this trend and seeks to quash the law that create
Rem: Rev. Esc. Minas. Publicado em: 2016-03
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15. Behavior of Eucalyptus urophylla and Eucalyptus citriodora Seedlings Grown in Soil Contaminated by Arsenate
ABSTRACT Persistent areas of tailings and deposits from coal and gold mining may present high levels of arsenic (As), mainly in the arsenate form, endangering the environment and human health. The establishment of vegetation cover is a key step to reclaiming these environments. Thus, this study aimed to evaluate the potential of Eucalyptus urophylla and E. c
Rev. Bras. Ciênc. Solo. Publicado em: 2016
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16. El sufrimiento colectivo de una ciudad minera en declinación: El caso de Lota, Chile
After 150 years of coal mining and industrial production, the southern Chilean town of Lota entered during the 70's a twofold process of continuous symbolic and material decline. Under the guidance of trade-unions and the Comunist Party, which provided the ideological basis that shaped the miners striving, the city's population is renowned for its struggle a
Horiz. antropol.. Publicado em: 2014-12
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17. Production of humic substances through coal-solubilizing bacteria
In this paper, the production of humic substances (HS) through the bacterial solubilization of low rank coal (LRC) was evaluated. The evaluation was carried out by 19 bacterial strains isolated in microenvironments with high contents of coal wastes. The biotransformed LRC and the HS produced were quantified in vitro in a liquid growth medium. The humic acids
Braz. J. Microbiol.. Publicado em: 2014-09
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18. 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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19. Química Sem Fronteiras: o desafio da energia
Coal, natural gas and petroleum-based liquid fuels are still the most widely used energy sources in modern society. The current scenario contrasts with the foreseen shortage of petroleum that was spread out in the beginning of the XXI century, when the concept of "energy security" emerged as an urgent agenda to ensure a good balance between energy supply and
Quím. Nova. Publicado em: 2013
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20. Susceptibility to DNA damage in workers occupationally exposed to pesticides, to tannery chemicals and to coal dust during mining
Our mutagenesis group has been studying with important economic drivers of our state, such as agriculture, the footwear and leather industry and open-cast coal mining. Working conditions in these sectors have potentially harmful to humans. The aim of these studies is to determine the health risk of workers by biomonitoring subjects exposed to genotoxic agent
Genet. Mol. Biol.. Publicado em: 2012
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21. Atributos químicos e especiação de cromo em solo com aplicação de resíduos de curtume e carbonífero em experimento de campo / Chemical attributes and chromium speciation in soil with application of tannery and coal mining residues in a field experiment
A disposição conjunta de resíduos no solo tem se mostrado uma alternativa para sua destinação final. Assim, o presente trabalho teve o objetivo de avaliar os efeitos da aplicação e reaplicação conjunta de resíduos de curtume e carbonífero nos atributos químicos do solo e na especiação do cromo, após 15 anos de estabilização. O experimento es
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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22. Influência de polimorfismos em genes de metabolismo de xenobióticos e reparação de DNA no risco ocupacional de mineiros de carvão a céu aberto
Colombia has one of the world s largest coal reserves being the fifth biggest thermal coal exporter world-wide. In open-cast coal mining extraction, large amounts of dust particles and heavy metals are released into the atmosphere, where they can form complex mixtures, representing a significant health risks to occupationally exposed workers. In addition, in
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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23. Simulação de produção em mina subterrânea de carvão com uso de conjuntos mecanizados / Mining simulation for room and pillar coal operation
Resumo No método de lavra câmaras-e-pilares, o sistema de lavra por conjuntos mecanizados teve, nos Estados Unidos, seu auge de aplicação entre as décadas de 50 e 60, dando lugar, posteriormente, ao sistema de mineração com minerador contínuo. No Brasil, conjuntos mecanizados ainda são utilizados em minas subterrâneas de carvão na região sul de S
Publicado em: 2011
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24. Atributos químicos relacionados ao processo de sulfurização em solos construídos após mineração de carvão / Chemical attributes of constructed soils after surface coal mining related to sulphurization process
A mineração de carvão a céu aberto envolve a remoção superficial do solo e de camadas geológicas, os quais devem ser repostos visando à reabilitação das áreas mineradas. Essa obra expõe o carvão às condições oxidativas do ar e altera as características originais do solo e da paisagem. Como consequência, o processo de sulfurização pode ser
Publicado em: 2011