Dumps
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Multi-stage dumping sequence - a feasible waste management alternative for open pit mining
Abstract Waste management and environmental aspects are progressively gathering attention in the mining industry. Mine planners must deal with increasingly complex tasks to balance between ore block schedules, waste disposal, operational cost and environmental reclamation. The mine incomes are generally related to mining and processing of the ore, thus most
REM, Int. Eng. J.. Publicado em: 2021-06
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2. Assessment of the effects of vegetational cover on the long-term stabilityof a waste rock dump
Abstract Waste rock dump reclamation includes re-grading the banks to flatten the overall slope followed by re-vegetation. These measures are required to reduce surface erosion, provide physical stability, and meet future use goals. In some cases, the presence of trees can cause localized shear zones in a waste rock dump by the load of the tree mass and the
REM, Int. Eng. J.. Publicado em: 16/09/2019
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3. Copper slag from different dumps in the Atacama Region used in mortars as partial replacement of cement
ABSTRACT The use of copper slag as a partial substitute for cement in mortar preparation was studied. Copper slag samples were collected from three dumps in the Atacama Region (Northern Chile). Mortars of 40x40x160 mm (width, height, length) and curing times of 7, 28 and 90 days were used in mechanical testing. Tests were performed with 0% (control mortar),
Matéria (Rio J.). Publicado em: 10/06/2019
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4. Gestão dos resíduos sólidos orgânicos urbanos no Brasil: do ordenamento jurídico à realidade
RESUMO No Brasil, ainda se enterram, queimam ou lançam a céu aberto milhões de toneladas de resíduos orgânicos, em decorrência do desconhecimento de seu potencial de aproveitamento e dos impactos negativos que provocam quando dispostos inadequadamente. Este trabalho buscou analisar a inserção e a aplicação dos princípios e objetivos da Política N
Eng. Sanit. Ambient.. Publicado em: 30/05/2019
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5. THE DYNAMICS OF THE SUBSTRATE RECOVERY OF WASTE DUMPS IN CALCARY MINING UNDER NATURAL REGENERATION
ABSTRACT This study aimed to evaluate the dynamics of the physical and chemical recovery of the substrates of waste dumps of different ages undergoing natural regeneration, in a calcary mining in Salto de Pirapora - SP, Brazil. Characterization of the vegetation, vegetation and physical and chemical cover of the substrates of the abandoned waste dumps since
CERNE. Publicado em: 2018-03
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6. Valorization of mining waste from Ouenza iron ore mine (eastern Algeria)
Abstract The present article is devoted to the development of a hematite-poor ore mine in Ouenza, which does not meet the steelmaker's requirements. Significant volumes are stored at the pithead of the mine, and the reserves are estimated at over 100 million tones. This enormous quantity of mining waste occupies an important space and poses a real threat to
REM, Int. Eng. J.. Publicado em: 2017-03
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7. Waste disposal using a spreader and conveyor belt method
Abstract In the search for opportunities to decrease operational costs in iron ore mining, waste disposal by conveyor belt has been considered as an alternative. In this work, this form of waste dump is investigated by means of the construction of a test pile and the assessment of geotechnical characteristics such as shear strength and in situ densities. Res
Rem: Rev. Esc. Minas. Publicado em: 2015-12
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8. Biodegradation of films of low density polyethylene (LDPE), poly(hydroxibutyrate-co-valerate) (PHBV), and LDPE/PHBV (70/30) blend with Paecilomyces variotii
The increased consumption of plastics in the world has been a subject of great concern and special attention by the scientific community. The aim is to promote development of materials that are biodegradable in a shorter time upon disposal in the environment. The most used synthetic plastics are difficult to biodegrade because they are made of long hydrocarb
Polímeros. Publicado em: 2015-02
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9. Mechanical performance of concrete with incorporation of coarse waste from the marble industry
The waste resulting from marble extraction process is usually disposed of in landfills or dumps and its accumulation is causing serious environmental and landscaping problems. One way of reusing marble waste is to consider its incorporation in structural concrete as a non-primary aggregate. This research work attempts to alleviate the situation and provide i
Mat. Res.. Publicado em: 30/09/2014
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10. Lixiviado de aterros sanitários brasileiros: estudo de remoção do nitrogênio amoniacal por processo de arraste com ar ("stripping") / Sanitary landfill leachate in Brazil: evaluation of ammonia nitrogen removal by air stripping process
Sanitary landfills are considered as the most appropriate way for final disposal of municipal solid wastes in Brazil, in the technical and economical point of view. Open dumps have been progressively substituted by well engineered and operated landfills. However, landfills still present environmental risks due to the gas emission and leachate production. Gas
Publicado em: 2009
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11. Biodiversity of Calliphoridae and Muscidae from urban garbage dumps of Presidente Prudente, São Paulo, Brasil / Biodiversidade de moscas Calliphoridae e Muscidae no depósito de lixo urbano de Presidente Prudente, São Paulo, Brasil
Estudou-se a biodiversidade de califorídeos e muscídeos no lixão de Presidente Prudente, São Paulo, Brasil, no período de março de 2006 a março de 2007. Para esse propósito, seis armadilhas com garrafas tipo pet de 2 litros, contendo como atrativo fígado bovino, foram alocadas ao redor do lixão. Foram capturadas 44.688 califorídeos, com maior freq
Publicado em: 2008
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12. Parâmetros operacionais no processamento de zeólitas desativadas por fusão com KHSO4
This work presents a study on the determination of the optimal experimental conditions for processing spent commercial zeolites in order to recover lanthanide elements and eventually other elements. The process is based on the fusion of the sample with potassium hydrogenosulfate (KHSO4). Three experimental parameters were studied: temperature, reaction time
Química Nova. Publicado em: 2007-04