Photoelectrochemical Process
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode
We investigated the photoelectrochemical oxidation of the dye Reactive Blue 4 in the presence of a DSA®-type electrode of nominal composition Ti/Ru0.3Ti0.7O2 under ultraviolet radiation, aiming to enhance the degradation yields of this dye. We conducted the photoelectrocatalytic treatment under galvanostatic control, using an 80 W mercury vapor lamp as the
J. Braz. Chem. Soc.. Publicado em: 2016-05
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2. Avaliação da atividade antimicrobiana de soluções de flumequina submetidas aos processos eletroquímico e foto-eletroquímico
Flumequine degradation by electrochemical and photo-electrochemical processes was evaluated in this study. The antimicrobial activity of the solutions subjected to the electrochemical processes was monitored during the assays. The experiments were carried out using DSA® (dimensionally stable anode) electrode. The influence of current density was investigate
Quím. Nova. Publicado em: 2014-06
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3. Degradação fotoeletroquímica do corante azul QR 19 em solução aquosa
In this work the degradation capacity of a photo-electrocatalytic system was evaluated, mainly regarding the effect of the electrolyte solution on the degradation capacity toward a reactive textile dye. In the presence of NaCl the photo-electrochemical process shows high degradation efficiency, permitting almost total color removal in treatment of about 5 mi
Química Nova. Publicado em: 2012
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4. Análise estrutural de filmes finos de hematita produzidos por spin-coating para geração de hidrogênio / Structural analysis of hematite thin films produced by spin-coating for hidrogen generation
Water photolysis at semiconductors is a clean and renewable method for solar energy conversion into hydrogen fuel. Hematite (-Fe2O3) thin films have been presented as a promissory material for water photolysis due to its abundance, chemical stability, environmental compatibility and appropriate band gap energy to absorb a large part of the solar spec
Publicado em: 2010
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5. Estudo da degradação do ácido tânico por processos eletroquímicos e fotoeletroquímicos / Study of the degradation of tannic acid by electrochemistry and photoelectrochemical process.
Este trabalho investigou a oxidação eletroquímica do ácido tânico em eletrodos do tipo Ânodo Dimensionalmente Estáveis (ADE) a base de SnO2 e IrO2 e eletrodos de Diamante Dopado com Boro (BDD). As eletrólises foram feitas em modo galvanostático em função de parâmetros como densidade de corrente e concentração de cloreto. A oxidação eletroquí
Publicado em: 2010
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6. Degradação de fenol por processos eletroquimico foto-assistido em escala piloto / Degradation of fenol using photo-assisted electrochemical process in pilot scale
A degradação de poluentes por biodegradação é um dos processos mais econômicos para o tratamento de compostos orgânicos. Na presença de substâncias tóxicas e recalcitrantes, entretanto, o processo biológico não é capaz de promover a degradação ou pode despender um tempo considerável para que a concentração requerida de um poluente seja alca
Publicado em: 2010
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7. Tratamento de efluentes provenientes de curtumes utilizando os processos eletroquímico e fotoeletroquímico / Treatment of tannery wastewaters using electrochemical and photoelectrochemical process
In this work the degradation of tannery wastewaters using electrochemical, photocatalytic and photoelectrochemical processes was studied. Wastewaters collected in an industry and solutions prepared in the laboratory, which simulated real wastewaters, were used in these studies. Effects of the anodic material, current density, presence of sulfate and chloride
Publicado em: 2009
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8. Reutilização de efluente de tingimentos de fibras acrílicas pós-tratamento fotoeletroquímico
On a laboratory scale effluents were produced from bichromic dyeing of acrylic fabrics with the basic dyes Blue Astrazon FGGL 300% and Yellow Gold Astrazon GL 200%. The residual dyeing baths were subjected to a photoelectrochemical treatment and reused in a second dyeing process. In the reutilization study, dyeings with treated effluent were compared with st
Química Nova. Publicado em: 2008
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9. Avaliação dos tratamentos eletroquímico e fotoeletroquímico na degradação de corantes têxteis
This paper presents the study of the oxidation of three textile dyes (Remazol black B, Remazol Brilliant Orange 3R and Remazol Golden Yellow RNL) using electrochemical and photoelectrochemical methods. In both methods, electrolysis experiments were performed at a current density of 50 mA cm-2 in an aqueous solution of each dye (30 mg L-1), using a photoelect
Química Nova. Publicado em: 2006-10
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10. Reuso de soluções de corantes básicos, pós-tratamento fotoeletroquímico, para tingimentos de fibras acrílicas
The increasing contamination of natural water resources is gaining public attention and has roused environmental concern in the society. As the second richest country in water resources, Brazil has an abundant supply of water, but it lacks a good management plan for these resources. It is estimated that by 2025, the industry will be responsible for 24% of th
Publicado em: 2006
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11. Tratamento de chorume de aterro sanitario usando eletrolise foto-assistida / Treatment of landfill leachate by photo-assisted electrolysis
Sanitary landfills are the major method used today for the disposal and management of municipal solid waste. Decomposition of waste and rainfall generate leachate at the bottom of landfills, causing groundwater contamination. The leachate is a dark grey, foul smelling solution and it can be considered a complex effluent, often containing organic compounds, h
Publicado em: 2004
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12. Fotocatálise eletroquímica de atrazina sobre dióxido de titânio: efeito de diferentes parâmetros experimentais
The atrazine photoelectrochemical degradation has been examined in solutions containing TiO2 on immobilized films under a variety of experimental conditions. It was possible to observe that the supporting electrolyte nature affects the intensity of the photocurrent, being an indicative of the adsorption process. The disappearance of the organic molecule foll
Química Nova. Publicado em: 2003-12