Recovery Of Waste Materials
Mostrando 1-12 de 27 artigos, teses e dissertações.
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1. Job precariousness: supply chain management in a waste pickers association
Resumo Waste pickers are key players within municipal solid waste management and an important link in the recycling chain. Waste pickers perform their activities in precarious conditions: they work in bad weather; run the risk of traffic accidents; come in contact with insects that transmit disease and suffer from weight overload. These conditions are aggrav
Interações (Campo Grande). Publicado em: 2022
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2. Mapping of areas suitable for the application of biosolids in the Quadrilátero Ferrífero region, Minas Gerais, Brazil
Abstract The recovery of degraded areas is imperative for the sustainability of mining activities. The main action implemented to improve the chemical, physical and biological conditions of soils, tailings and sterile deposits is the incorporation of organic material. Biosolids (hygienized sewage sludge) are among the organic materials that can be applied. H
REM - International Engineering Journal. Publicado em: 2022
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3. Análise do potencial de aproveitamento energético de biogás de aterro e simulação de emissões de gases do efeito estufa em diferentes cenários de gestão de resíduos sólidos urbanos em Varginha (MG)
RESUMO O presente trabalho propõe avaliar a viabilidade econômica e ambiental de aproveitamento energético do biogás do aterro sanitário do município de Varginha (MG), além de analisar as emissões de gases de efeito estufa (GEE) e o uso de energia em diferentes cenários hipotéticos de gerenciamento de resíduos sólidos urbanos (RSU). Considerou-se
Eng. Sanit. Ambient.. Publicado em: 25/11/2019
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4. Enrichment of Copper, Lead, and Tin by Mechanical Dry Processing of Obsolete Printed Circuit Board Residues
Waste printed circuit boards (WPCB) residues were mechanically processed to concentrate their metal content aiming to reduce costs of the subsequent recovery of copper, tin, and lead. A fully dry route was proposed to avoid the generation of liquid effluents that would require additional treatment. Firstly, 10.7% of the residue was segregated by magnetic sep
Mat. Res.. Publicado em: 24/10/2019
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5. Halogen Determination in Polymeric Waste of Electrical and Electronic Equipment: Overcoming Limitations in Sample Preparation
Sample preparation of polymers for halogen determination requires special attention because they are difficult to bring into solution and due to the risk of analyte losses when using acid digestion. A method using microwave-induced combustion (MIC) was optimized for accurate determination of halogens in polymeric parts obtained in waste of electrical and ele
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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6. REVISITING THE NUCLEOPHILICITY CONCEPT IN A COMPREHENSIVE BIOMASS VALORIZATION EXPERIMENT: FROM PAPAYA SEEDS TO THIOUREA MOTIFS
The recovery of waste materials with potential for synthetic transformations is a major field in science. However, just few experiments have been devoted to undergraduate students by exploring some consistent subjects in light of simple, natural resources. Nucleophilicity is a central subject in chemistry and there are significant synthetic models to exploit
Quím. Nova. Publicado em: 21/10/2019
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7. Chlorine and Fluorine Determination in Eye-Pencil: Development of an Eco-Friendly Sample Preparation Method for Ion Chromatography Analysis
In this paper, a feasible method was proposed for the chlorine and fluorine determination in eye-pencil samples using ion chromatography (IC). The microwave-induced combustion (MIC) was used to digest up to 200 mg of a sample, with 50 mg of microcrystalline cellulose as a combustion aid and only water for analytes absorption. Cl and F recoveries were 105 ±
J. Braz. Chem. Soc.. Publicado em: 21/10/2019
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8. Operational conditions of an electrostatic separator for concentrate copper from electronic waste
Abstract Interest in recycling for the recovery of valuable substances, such as precious metals from electric and electronic waste has been increasing year after year due to the large amount present in such waste compared to primary sources. There is environmental concern, since the amount of this kind of waste is increasing due to rapid technological advanc
REM, Int. Eng. J.. Publicado em: 2018-07
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9. Potential Bio-Oil Production from Invasive Aquatic Plants by Microscale Pyrolysis Studies
The invasive aquatic plants Eichhornia crassipes (water hyacinth), Eichhornia azurea, and Nymphaea spp. were evaluated as sources of lignocellulosic biomass for the production of bio-oil. These plants have high growth rates that can lead to various environmental problems and the production of large amounts of waste biomass. The materials were characterized i
J. Braz. Chem. Soc.. Publicado em: 2018-01
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10. Partial-hydrothermal hydrolysis is an effective way to recover bioactives from turmeric wastes
Abstract Partial-hydrothermal hydrolysis using pressurized hot water was applied in waste turmeric, derived from extraction processes that employed supercritical and pressurized fluids, as a sustainable alternative for the recovery of bioactive constituents from this material. The reaction products consisted of a liquid extract of fermentable sugars and a so
Food Sci. Technol. Publicado em: 26/10/2017
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11. Recovery of Steelmaking Slag and Granite Waste in the Production of Rock Wool
Steelmaking slag and residues from granite cuttings are industrial wastes with considerable production, however limited applications. This work studied an inertization and recovery process of such wastes as raw materials into production of rock wool (i.e. a thermo-acoustic insulator with growing market). Several batches were produced aiming the chemical prop
Mat. Res.. Publicado em: 2015-02
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12. Using different catalysts in the chemical recycling of waste from flexible polyurethane foams
Due to their versatility, polyurethane (PU) foams have many different applications, such as sponges, filling materials in furniture, automotive seats and clothes, among others. It is also one of the main refrigerator components serving as a heat insulating material. As PUs find different application niches, they must be largely produced and, consequently, lo
Polímeros. Publicado em: 25/10/2013