Ions Leaching
Mostrando 1-12 de 41 artigos, teses e dissertações.
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1. Effect of DLC Films with and without Silver Nanoparticles Deposited On Titanium Alloy
Resumo O filme de carbono semelhante a diamante (DLC) é um material de revestimento duro e biocompatível que pode impedir a corrosão com liberação de íons metálicos. Este estudo avaliou as características estruturais do filme de DLC, com e sem nanopartículas de prata (Ag), depositadas por plasma (PECVD) em liga de titânio (Ti-6Al-4V) e formação �
Braz. Dent. J.. Publicado em: 28/11/2019
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2. Influence of ZnO on the properties of elastomeric compositions and their leached extract
Abstract The reductionin zinc oxide (ZnO) content in elastomeric compositions has become a subject due to the deleterious effect of zinc ions on aquatic organisms. The purpose of this study was to develop elastomeric compositions containing 0, 1, 3 and 5 phr of ZnO aiming at assessing the influence of the different contents on the rheometric, mechanical and
Polímeros. Publicado em: 04/11/2019
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3. Leaching of Heavy Metals in Soils Conditioned with Biosolids from Sewage Sludge
ABSTRACT A promising use of biosolids is as organic fertilizer in agricultural and forestry activities. However, its composition might contain several pollutants, especially heavy metals, which may result in an increase in the concentrations of these elements in the soil and the risk of groundwater contamination. This study aimed to determine the leaching le
Floresta Ambient.. Publicado em: 03/10/2019
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4. Evaluation of the embryotoxicity in zebrafish (Danio rerio) of the flocculant and coagulant compounds used for water remediation
Resumo Objetivo: O carreamento decorrente das atividades de mineração atinge corpos d'água, causando contaminação da água e acidificação por metais tóxicos. Como conseqüência, a depleção de oxigênio ocorre, com o desaparecimento de certos organismos bênticos, perdas na biomassa do fitoplâncton e do zooplâncton, e mortalidade de peixes. Rem
Acta Limnol. Bras.. Publicado em: 25/04/2019
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5. LEACHING Zn FROM THE LOW-GRADE ZINC OXIDE ORE IN NH3-H3C6H5O7-H2O MEDIA
Abstract In this research, the effect of different citric acid concentrations, ammonia concentration, temperature, leaching time, stirring speed and liquid-to-solid ratio on the zinc leaching from low-grade zinc oxide ore in a NH3-H3C6H5O7-H2O system were studied. The results showed that the zinc leaching rate is only 4.7% when the citric acid concentration
Braz. J. Chem. Eng.. Publicado em: 2016-12
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6. Preparation and characterization of Zn(II) ion-imprinted polymer based on salicylic acrylate for recovery of Zn(II) ions
Abstract This work describes the synthesis of new ion-imprinted polymers (IIPs) for selective solid phase extraction of Zn(II) ions from aqueous samples. IIPs were synthesized by copolymerization of salicylic acrylate (SA) as a functional monomer and ethylene glycol dimethacrylate (EGDMA) as a crosslinker in the presence of 2,2’-azobisisobutyronitrile (AIB
Polímeros. Publicado em: 22/08/2016
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7. Synthesis of Nano-Pore Size Ag(I)-Imprinted Polymer for the Extraction and Preconcentration of Silver Ions Followed by Its Determination with Flame Atomic Absorption Spectrometry and Spectrophotometry Using Localized Surface Plasmon Resonance Peak of Silver Nanoparticles
Silver ion imprinted polymer (IIP) was synthesized in the presence of Ag(I)-N,N’‑bis(salicylidene)ethylenediamine (salen) complex using 4-vinylpyridine as the functional monomer, ethylene glycol dimethacrylate (EGDMA) as the crosslinker, and 2,2-azobis(isobutyronitrile) (AIBN) as the initiator. The Ag(I)-imprinted polymer (IIP) particles were characteriz
J. Braz. Chem. Soc.. Publicado em: 2015-06
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8. Recovery Process Development for the Rare Earths from Permanent Magnet Scraps Leach Liquors
The current study deals with the recovery process development for the rare earths (REs), i.e., dysprosium (Dy) and neodymium (Nd), metals from permanent magnet scraps leach liquors. Its main objective is the recovery of the rare earths (Dy and Nd) from permanent magnet scraps (PMSs). Introdutory experiments were carried out to get leach liquor solution: oxid
J. Braz. Chem. Soc.. Publicado em: 2015-06
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9. Nutrients behavior from the association pig slurry and chemical fertilizers on soybean crop
This study aimed at evaluating the effects of pig slurry application with mineral fertilizer on ions leaching from the soil in soybean crop. The experiment was carried out in 24 drainage lysimeters under protection. The soybean cultivar CD 202/COODETEC was sown in a soil that received 0, 100, 200 and 300 m³ha-1of pig slurry in one cycle, with or without min
Braz. arch. biol. technol.. Publicado em: 2013-10
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10. Aplicação de vinhaça via gotejamento subsuperficial e seus efeitos nos perfis de distribuição iônica e atributos físicos e químicos de um Nitossolo / The effect of vinasse application by subsurface drip irrigation on ion distribution profile and physical and chemical attributes in nitosol soil
O aumento da produção de cana-de-açúcar no Brasil é de grande relevância para o cenário agroindustrial atual do país. Entretanto, acarreta a um aumento na geração de subprodutos do setor de usinas sucro-alcooleira. Dentre esses subprodutos destaca-se a vinhaça, pois possui uma série de nutrientes em sua composição. Diante do grande volume de vi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/10/2012
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11. Alterações aos atributos químicos e mobilidade de íons em colunas de solo tratados com lodo de esgoto doméstico / Changes in chemical attributes and mobility of ions in soil columns treated domestic sewage sludge
A gestão de resíduos, em especial ao lodo de esgoto é de extrema importância com vistas ao desenvolvimento sustentável. Contudo o estudo da dinâmica dos íons presentes no lodo de esgoto ao longo do perfil do solo é de grande relevância para nos fornecer parâmetros úteis que nos permitam estabelecer a relação entre dose e impacto ambiental. Neste
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/08/2010
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12. Recuperação de urânio de rejeito de mina por meio de lixiviação alcalina / Recovery of uranium from mine wastes by alkaline leaching
Appropriate management of wastes is one of the most important environmental problems, particularly concerning the tailings of mining activities. Interim storage of the tailings at incorrect places pending treatment demands an urgent solution. The Osamu Utsumi Mine located in the city of Caldas, Minas Gerais, has faced such problem. The waste of the mine cons
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/04/2010