Coal Wastes
Mostrando 1-11 de 11 artigos, teses e dissertações.
-
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
-
2. 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
-
3. 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
-
4. 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
-
5. Estudo do processo de calcinação como operação unitária adicional na pelotização de minérios de ferro com altos valores de PPC
The mineral resources from the Alegria complex, at the Mariana Ouro Preto/MG region, where Samarco´s deposits (Alegrias Norte, Centro and Sul) are located, present a significant parcel of composition related to low iron grade itabirites (below 50%) and high LOI contents (above 3.5%). The search for producing concentrates from these deposits using the curren
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/06/2011
-
6. Atividade mutagênica em solos sob a influência de rejeitos de carvão
O solo é um compartimento ambiental altamente complexo e, em razão do crescimento populacional acelerado e da intensa atividade industrial e agrícola, tem sofrido com a contaminação de substâncias de origens diversas. Entre as principais atividades que contribuem para a perturbação da qualidade dos solos estão as atividades de geração de energia p
Publicado em: 2008
-
7. PREDIÇÃO DO POTENCIAL DE DRENAGEM ÁCIDA DE MINAS UTILIZANDO O MÉTODO CINÉTICO DA COLUNA DE LIXIVIAÇÃO / POTENTIAL PREDICTION OF ACID MINE DRAINAGE EMPLOYING LEACHING COLUMN KINETIC METHOD
The acid rock mine drainage (ARD) arising from sulfides oxidation in mining areas is a serious environmental problem that markedly affects the quality of the surrounding water. Choosing the measure for remediation and/or preventing pollution effect depends on a suitable evaluation through a prediction program, it has principally tests of the acid generation
Publicado em: 2007
-
8. Estudo de mistura solo-carvão ativado como barreira reativa no tratamento de lixiviados de resíduos sólidos urbanos
Esta pesquisa tem por objetivo avaliar a adsorção de metais pesados às partículas sólidas de um solo residual de arenito e misturas desse solo com carvão ativado nas proporções de 1%, 5% e 10% em volume, base seca. Assim, foram propostos dois tipos de ensaios: ensaio de coluna e ensaio de equilíbrio em lote para analisar a aplicabilidade da técnica
Publicado em: 2006
-
9. Estudo da otimização da produção de inulinase por Kluyveromyces marxianus NRRL Y-7571 em meios industriais pre-tratados. / Studies of the otimização of the production of inulinase for Kluyveromyces marxianus NRRL Y-7571 in half daily pay-treat industrials.
Inulinase is an enzyme relevant to fructose production by enzymatic hydrolysis of inulin. This enzyme is also used in the production of fructooligosaccharides that may be used as a new food functional ingredient. Commercial inulinase is currently obtained using inulin as substrate, which is a relatively expensive raw material. In Brazil, the production of th
Publicado em: 2004
-
10. Reduced Sulfur in Ashes and Slags from the Gasification of Coals: Availability for Chemical and Microbial Oxidation †
This study was initiated to determine if reduced sulfur contained in coal gasifier ash and slag was available for microbial and chemical oxidation because eventual large-quantity landfill disposal of these solid wastes is expected. Continuous application of distilled water to a column containing a high-sulfur-content (4% [wt/wt]) gasifier slag yielded leacha
-
11. Microbial production of surfactants and their commercial potential.
Many microorganisms, especially bacteria, produce biosurfactants when grown on water-immiscible substrates. Biosurfactants are more effective, selective, environmentally friendly, and stable than many synthetic surfactants. Most common biosurfactants are glycolipids in which carbohydrates are attached to a long-chain aliphatic acid, while others, like lipope