2011
DOI: 10.1590/s0103-50532011000900019
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Analytical methods in photoelectrochemical treatment of phenol

Abstract: O presente estudo visou o tratamento de efluente simulado, contendo fenol por processos fotocatalítico e fotolítico com análise toxicológica das soluções fenólicas. Dois sistemas de tratamento foram propostos com radiação UV, eletrodos maciços e potencial elétrico. No primeiro sistema (S1), a concentração de fenol foi determinada por espectrofotometria direta em 269 nm e o segundo (S2) por meio do método fotométrico direto (4-aminoantipirina). Testes de toxicidade foram realizados com dois microrganismos: Esch… Show more

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Cited by 8 publications
(8 citation statements)
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“…Furthermore, Estruga et al (2010) discovered that silicon-doped electrodes increased catalyst surface area. However, the TiO 2 has a large surface area (around 50 m 2 .g À1 ) and its complex crystalline microstructure promotes better charge separation which inhibits recombination (Lopes et al, 2011), resulting in a better performance in degrading processes.…”
Section: Resultsmentioning
confidence: 99%
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“…Furthermore, Estruga et al (2010) discovered that silicon-doped electrodes increased catalyst surface area. However, the TiO 2 has a large surface area (around 50 m 2 .g À1 ) and its complex crystalline microstructure promotes better charge separation which inhibits recombination (Lopes et al, 2011), resulting in a better performance in degrading processes.…”
Section: Resultsmentioning
confidence: 99%
“…AOPs are oxidation processes in which hydroxyl radicals (OH ) are generated in sufficient quantities to serve as the main oxidizing agents (Lopes et al, 2012;Wang et al, 2014). Among the AOPs, heterogeneous photocatalysis has been widely studied and its principle involves the activation of a semiconductor by sunlight or artificial light (Lopes et al, 2011;Gulyas, 2014).…”
Section: Introductionmentioning
confidence: 99%
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“…The source of visible light was achieved by the Xenon lamp with a 420 nm cutoff filter to ensure the desired irradiation. The method used to determine the phenol concentration in this present research is direct photometric method, 49 which was performed according to the 5530-D procedure of the ‘Standard methods for the examination of water and wastewater’. 50 This procedure is based on the reaction at pH 7.9 ± 0.1 of phenolic compounds with 4-aminoantipyrine forming an orange compound.…”
Section: Methodsmentioning
confidence: 99%
“…From the results, it can be seen that there was some instability in the first 2 hours of photodegradation. This can be attributed to the brown colouration of the solution during the first two hours when phenol was degraded to coloured intermediates [18]. The coloured intermediates interfered with UV-vis measurements thus resulting in inaccurate readings.…”
Section: A Effect Of Catalyst Compositionmentioning
confidence: 99%