2009
DOI: 10.1590/s0100-40422009000800014 View full text |Buy / Rent full text
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Abstract: Recebido em 15/9/08; aceito em 24/4/09; publicado na web em 30/9/09 DEGRADATION OF BENZENE, TOLUENE AND XILENES IN GASOLINE-CONTAMINATED WATERS BY PHOTO-FENTON PROCESSES. In this work the potentiality of photo-Fenton processes were investigated toward the degradation of aromatic hydrocarbons (BTXs) from water contaminated with gasoline. The main results demonstrated that BTXs can be quickly degraded by photo-Fenton process assisted by solar or artificial UV-A radiation, degradation that leads to generation of … Show more

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“…Satisfactory reductions of lignin compounds and total phenolics can be attributed to aromatic content in the start of the process; above those occur the electrophilic addition of hydroxyl radicals, generating new phenols in the media. Once the oxidative process continues, these formed compounds undergo the breakdown of the aromatic rings, lose their chromophoric groups and afterwards would mineralize (Tiburtius et al, 2009;Kamali and Khodaparast, 2015). Theses results indicate that higher H2O2 doses should be implemented to mineralize of the organic compounds.…”
Section: Effluent Treatment By Uv/h2o2 Processmentioning
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“…Satisfactory reductions of lignin compounds and total phenolics can be attributed to aromatic content in the start of the process; above those occur the electrophilic addition of hydroxyl radicals, generating new phenols in the media. Once the oxidative process continues, these formed compounds undergo the breakdown of the aromatic rings, lose their chromophoric groups and afterwards would mineralize (Tiburtius et al, 2009;Kamali and Khodaparast, 2015). Theses results indicate that higher H2O2 doses should be implemented to mineralize of the organic compounds.…”
Section: Effluent Treatment By Uv/h2o2 Processmentioning
“…According to Tiburtius et al (2009) this reagent is consumed in a short period of time and it is not advisable to add the whole concentration at once. In this way, the concentration of 600 mg‧L -1 was fixed and the degradation of the pharmaceuticals analyzed for 60 minutes, substituting the single addition of hydrogen peroxide for a fractional addition at the times of 0, 10 and 20 minutes.…”
Section: Degradation Of the Pharmaceuticals Using Advanced Oxidation Processesmentioning
“…A degradação do paracetamol através do processo foto-Fenton e ação UV/H2O2, foi avaliada após exposição do fármaco à radiação UV-C em reator de bancada com emissão de fótons igual a 1,48 mW.cm -2 , intensidade essa inferior a relatada por Tiburtius et al (2009) em seus estudos (3,0 mW.cm -2 ), contudo capaz de promover a degradação do composto de interesse, conforme pode ser observado a seguir. O fármaco foi quantificado após extração líquido-líquido (ELL) com diclorometano e concentração em rota-evaporador da solução aquosa preparada com concentração igual a 1mg.L -1 conforme descrito na metodologia.…”
Section: Degradação Do Paracetamolunclassified