Heterogeneous photo-Fenton degradation of phenolic aqueous solutions over iron-containing SBA-15 catalyst

Martı́nez, Fernando; Calleja, Guillermo; Melero, Juan A.; Molina, R.

doi:10.1016/j.apcatb.2005.03.004

Cited by 154 publications

(98 citation statements)

References 26 publications

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“…23 The key point of this work is that the size of iron oxide nanoparticles embedded in the meso-macroporous matrices has been decreased to 15-20 nm in diameter, to give high surface area of the active catalytic sites in comparison with the previous sub-micron scald iron oxide. 20-3 22,24 As a matter of fact, these new Fe2O3@meso-macroporous silica matrix can successfully degrade the pollutant with twelve-times less iron oxide, than previously reported. 20,25 …”

Section: Introductionmentioning

confidence: 77%

Metallo-Solid Lipid Nanoparticles as Colloidal Tools for Meso–Macroporous Supported Catalysts

et al. 2015

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Meso-macroporous silica containing iron oxide nanoparticles (15-20 nm) was synthesized by formulating solid lipid nanoparticles and metallosurfactant as both template and metal source. Due to the high active surface area of the catalyst, the material exhibits an excellent performance in a Fenton-like reaction for methylene blue (MB) degradation, even at low amount of iron oxide (5% TOC after 14h).2

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Section: Introductionmentioning

confidence: 77%

Metallo-Solid Lipid Nanoparticles as Colloidal Tools for Meso–Macroporous Supported Catalysts

et al. 2015

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“…These drawbacks can be overcome by using heterogeneous Fenton-type catalysts, in particular, zeolites, whose recovery from water is not difficult. Iron and copper containing zeolites show redox properties because these metals can change their oxidation states [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Recently, high catalytic activity of iron containing zeolites for phenol oxidation [15,16] and for degradation of dyes [2,3] has been reported.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous Fenton-like degradation of Rhodamine 6G in water using CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis

Dükkancı

Gündüz

Yılmaz

et al. 2010

Journal of Hazardous Materials

162

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a b s t r a c tIn this study, heterogeneous Fenton-like degradation of reactive azo dye Rhodamine 6G in water was investigated over a CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis. At initial pH of 3.4, a color removal of 100% was achieved after a reaction time of 45 min. TOC elimination was measured to be 51.8% after 2 h of oxidation. Initial decolorization rate was described by an equation of −r A0 = 4.56 × 10 2 e −24.83/RT C R6G,0 C 0.35 H 2 O 2 ,0 where R is in kJ/mol. The leaching of iron and copper cations from zeolite structure into the solution during oxidation was dependent on pH strongly. The regulation of pH from 6.5 (dye solution pH) to 3.4, increased leaching for iron from 0.7 to 0.8 mg/dm 3 and for copper from 1.4 to 2.1 mg/dm 3 . The copper was totally leached from the catalyst during the process at pH 3.4.

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“…Em função desta problemática, a utilização de formas imobilizadas de íons ferro em matrizes orgânicas ou inorgânicas emerge como uma proposta alternativa de tratamento [9,10] . Dentro deste âmbito, matrizes poliméricas contendo grupamentos específicos podem ser utilizadas para a fixação de ferro como, por exemplo, a quitosana.…”

Section: Espectroscopia Na Região Do Infravermelhounclassified

Esferas de quitosana/Fe na degradação do corante Azul QR-19 por processos foto-Fenton utilizando luz artificial ou solar

Souza¹,

Zamora²,

Zawadzki³

2010

Polímeros

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Resumo: A contaminação dos recursos hídricos é um dos maiores problemas ambientais da atualidade. Dentre as várias fontes poluidoras, destacam-se as indústrias têxteis, por serem fontes geradoras de grandes volumes de efluentes, muitas vezes tratados de maneira ineficiente. A principal causa do grande impacto ambiental decorrente deste descarte é a presença dos corantes, tais como os compostos do tipo azo, que podem gerar subprodutos de caráter carcinogênico e/ou mutagênico, ou como os de base antraquinona, que são muito resistentes à degradação natural e portanto persistem no efluente por um longo tempo. O objetivo do presente trabalho consiste na utilização de processos foto-Fenton assistidos por luz artificial e solar, utilizando ferro imobilizado em esferas de quitosana reticulada com glutaraldeído, para promover a degradação do corante reativo Azul QR-19, de base antraquinona, em solução aquosa. As esferas obtidas apresentaram tamanho regular com diâmetro de 4,0 mm. Os resultados demonstraram 90% de descoloração do sistema em 180 minutos e redução de 60% do teor de carbono orgânico total (COT), para o sistema foto-Fenton utilizando luz artificial. Para o sistema fotoassistido com luz solar, a descoloração foi integralmente obtida em 120 minutos com 70% de redução do teor de COT. Foi observado que o ferro permaneceu na matriz após o tratamento, possibilitando sua reutilização. Palavras-chave: Quitosana, ferro imobilizado, processo foto-Fenton. Chitosan/Fe Spheres on the Blue QR-19 Dye Degradation by Photo Fenton Processes Using Artificial or Solar LightAbstract: The contamination of water resources is one of the greatest environmental problems today. Among the polluting sources are the textile industries due to the production of large volumes of effluent, often treated inefficiently. The main reason for the environmental impact of the rejected materials is the presence of dyes such as azo reactive compounds that can generate by-products with carcinogenic and mutagenic effects. They may also include anthraquinone type compounds, which are highly resistant to degradation and persist in the effluent for a long time. The purpose of this study is the use of photo-Fenton processes assisted by artificial or solar light, using immobilized iron on chitosan beads, crosslinked with glutaraldheyde, for the antraquinone type compound Blue QR-19 standard dye degradation in aqueous solutions. The obtained spheres showed a regular size and 4.0 mm diameter. The results showed 90% discolouration of the system within 180 minutes and a 60% total organic carbon (TOC) reduction for the photo-Fenton system using artificial light. For the system using sunlight, the total discolouration was achieved in 120 minutes and the TOC value decreased 70%. Also observed was that iron remained in the polymeric matrix after the treatment, thus allowing reuse. Keywords: Chitosan, immobilized iron, photo-Fenton process. IntroduçãoA contaminação dos recursos hídricos pode ser apontada como um dos grandes problemas dos países desenvolvidos e em des...

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Heterogeneous photo-Fenton degradation of phenolic aqueous solutions over iron-containing SBA-15 catalyst

Cited by 154 publications

References 26 publications

Metallo-Solid Lipid Nanoparticles as Colloidal Tools for Meso–Macroporous Supported Catalysts

Metallo-Solid Lipid Nanoparticles as Colloidal Tools for Meso–Macroporous Supported Catalysts

Heterogeneous Fenton-like degradation of Rhodamine 6G in water using CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis

Esferas de quitosana/Fe na degradação do corante Azul QR-19 por processos foto-Fenton utilizando luz artificial ou solar

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