Electroosmosis
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. REMEDIACIÓN ELECTROCINÉTICA DE UN SUELO REAL CONTAMINADO CON PLOMO ASISTIDA CON LA ADICIÓN DE UN AGENTE COMPLEJANTE
The use of ethylenediaminetetraacetic acid disodium salt (Na2EDTA) as a chelating agent presents ideal characteristics to be used for the removal of lead from a contaminated site. Batch experiments together with a simple local equilibrium model were carried out to evaluate the role of EDTA as enhancing agent in electrokinetic remediation of a Pb-contaminated
Quím. Nova. Publicado em: 2020-09
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2. Physical methods for topical skin drug delivery: concepts and applications
Topical drug delivery is an interesting approach to treat skin diseases and to avoid pain and low patient compliance in cases where a systemic delivery is required. However, the stratum corneum, which is the outermost skin layer, strongly protects the body from the entrance of substances, especially those hydrophilic. In this context, different physical meth
Braz. J. Pharm. Sci.. Publicado em: 08/11/2018
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3. Electro-osmosis in kaolinite with pH-dependent surface charge modelling by homogenization
Neste artigo propomos um modelo em três escalas para descrever o acoplamento entre o fluxo eletroosmótico e o transporte de íons incluindo fenômenos de adsorção em uma caulinita. A argila é caracterizada por três escalas nano/micro e macroscópica. A escala microscópica é constituída por micro-poros saturados por uma solução aquosa contendo quat
Anais da Academia Brasileira de Ciências. Publicado em: 2010-03
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4. Aceleração da consolidação em solos tropicais com drenos condutores elétricos / Acceleration of consolidation on tropical soil with electro conductor drain
The electrokinetic method has been studied by a growing number of research centers, in application such as mining engineering, civil and environmental engineering, food and sports. To meet the application needs it was necessary to develop a new technology that combines a variety of materials, functions and processes for the implementation of specific activit
Publicado em: 2009
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5. Integração dos processos de eletrodiálise e de degradação fotoquímica para o tratamento de efluentes salinos contendo fenol. / Integration of electrodialysis and photochemical degradation process for the treatment of a saline wastewater containing phenol.
Chemical oxidation processes can be used to treat industrial wastewater containing non-biodegradable organic compounds. However, the presence of dissolved salts may inhibit or retard the treatment process. In this work, a coupled process is studied including a desalination step by electrodialysis (ED) associated with an advanced oxidation process (photo-Fent
Publicado em: 2009
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6. Condutividade eletrosmótica e remediação de solos contaminados com cádmio via eletrosmose / Electroosmotic conductivity and remediation of cadmium contaminated soils via electroosmosis
O presente trabalho abordou a aplicação de fenômenos eletrocinéticos na remediação de solos, com um direcionamento ao emprego da eletrosmose na descontaminação de três solos da Zona da Mata Norte, estado de Minas Gerais, Brasil, contaminados com o elemento- traço cádmio. Buscou-se ampliar o horizonte de pesquisas já desenvolvidas na Universidade
Publicado em: 2008
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7. ESTUDO DA ELETRO-OSMOSE EM SOLOS RESIDUAIS DESENVOLVIMENTO DE EQUIPAMENTO E METODOLOGIA DE ENSAIO / THE STUDY OF ELECTRO-OSMOSIS IN RESIDUAL SOILS: DEVELOPMENT OF TEST EQUIPMENT AND METHODOLOGY
The present dissertation presents a laboratory study of electro-osmosis in a residual soil from gneiss. The objective of this study was to develop test equipment and methodology. Two different cells were constructed,one for natural and the other for reconstituted material. The experimental results are consistent with technical literature values. It was obser
Publicado em: 2002
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8. TRANSPORTE ELETROCINÉTICO DE GASOLINA E ÓLEO ATRAVÉS DE UM SOLO RESIDUAL GNÁISSICO E BORRA DE PETRÓLEO DA BACIA DE CAMPOS / ELECTROKINETIC TRANSPORT OF GASOLINE AND OIL THROUGH A GNAISSIC RESIDUAL SOIL AND OIL GOUND FROM CAMPOS BASIN
This study assesses the use of electrokinetics as an innovative technique for remediation of fine-grained soils. It relies on the application of an electrical potential through a soil mass, producing a series of coupled flows, including fluid flow -electroosmosis- and migration of ions. The first stage of the experimental program encompassed a series of test
Publicado em: 2002
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9. Eletrochemical techniques for particulate system decontamination treatments. / Avaliação da técnica de eletroosmose na remoção de contaminante orgânico em meios particulados.
The use of electrochemical techniques is probably one of most promising technology for particulate system decontamination treatments. This methodology appears as able to remove heavy metals, radionucletides and organic and inorganic contaminations. By using an electric potential difference with low currents intensities through electrodes, the contaminants in
Publicado em: 2001
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10. Efeitos da corrente eletrica continua na recuperação de petroleo
Many patents have been published about the effect of applying electrical potentials in order to enhance oil recovery. These investigations emphasize only heating effects that causes, in consequence, oil viscosity reduction. However, there are indications of the influence of other effects. The aim of this work was to investigate the effects of applying a dire
Publicado em: 1994
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11. The electroosmotic droplet switch: Countering capillarity with electrokinetics
Electroosmosis, originating in the double-layer of a small liquid-filled pore (size R) and driven by a voltage V, is shown to be effective in pumping against the capillary pressure of a larger liquid droplet (size B) provided the dimensionless parameter σR2/ε|ζ|VB is small enough. Here σ is surface tension of the droplet liquid/gas interface, ε is the l
National Academy of Sciences.
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12. Electrical Membrane Properties and Circadian Rhythm in Extensor Cells of the Laminar Pulvini of Phaseolus coccineus L. 1
Circadian changes of three parameters of electrical properties in extensor cells of the laminar pulvini of Phaseolus coccineus L. have been recorded by standard microelectrode techniques. In the low turgor state of the cells, the resting potential and the CN− (1 millimolar NaCN) induced depolarizations are large, while the K+-induced voltage changes are sm