Catalytic wet peroxide oxidation of phenol with a Fe/active carbon catalyst

Zazo, Juan A.; Casas, José A.; Mohedano, A.F.; Rodrı́guez, Juan J.

doi:10.1016/j.apcatb.2006.02.008

Cited by 287 publications

(198 citation statements)

References 21 publications

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“…Desta forma, o desenvolvimento de tecnologias eficientes e baratas de tratamento constitui uma necessidade e consideráveis esforços de pesquisa estão sendo dedicados nesse campo (ZAZO et al, 2006). Os Processos Oxidadtivos Avançados (POAs) apresentam uma elevada eficiência no tratamento de corantes sintéticos e outros poluentes de difícil degradação (ZHAO et al, 2012).…”

Section: Introductionunclassified

Estudo de oxidação avançada de corantes básicos via reação Fenton (Fe2+/H2O2)

Paulino

Araújo

Salgado

2015

Eng. Sanit. Ambient.

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The process of advanced oxidation by Fenton reaction (Fe 2+ /H 2 O 2 ) was studied in this work for decolorization of two synthetic effluents, containing the dyes Methylene Blue (MB) and Rhodamine B (RB).Experimentally, solutions at concentrations of 10 mg L -1 of the dyes were exposed to different concentrations of the oxidizing agent (H 2 O 2 ) and catalyst (Fe 2+ ) at a temperature of 27 °C and pH 3. The results showed high levels of color removal, with efficiency of 96% for MB and 86% RB.The data showed good adjustment to the kinetic model. The monitoring of the absorption spectrum of the dyes showed a reduction in amplitude of the peaks related to the chromophoric groups in both compounds, confirming the levels of efficiency achieved. The analysis of removal of organic matter in terms of Chemical Oxygen Demand (COD) did not follow the same rate of decrease of decoloration, resulting in reductions of 40.9% for MB and 25.5% for the RB.

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Section: Introductionunclassified

Estudo de oxidação avançada de corantes básicos via reação Fenton (Fe2+/H2O2)

Paulino

Araújo

Salgado

2015

Eng. Sanit. Ambient.

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“…Segundo Coughlin, Kinkle e Bishop (2003), cerca de 4% da produção de corantes orgânicos decorrente dos processos de síntese e aplicação se perde para o meio ambiente, produzindo águas residuárias fortemente coloridas. O desenvolvimento de tecnologias eficientes e baratas para o tratamento de efluentes contendo corantes constitui uma necessidade, e consideráveis esforços estão sendo dedicados a esse campo de pesquisa (ZAZO et al, 2006). Neste contexto, processos oxidativos avançados (POAs) se apresentam como tecnologias capazes de reduzir os problemas ambientais gerados por estes efluentes (FORGACS; NANSHENG; HELIN, 2004;SHU;CHANG, 2005).…”

Section: Introductionunclassified

Descoloração de efluentes aquosos sintéticos e têxtil contendo corantes índigo e azo via processos Fenton e foto-assistidos (UV e UV/H2O2)

Salgado¹,

Nogueira²,

Rodrigues

et al. 2009

Eng. Sanit. Ambient.

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ResumoNo presente trabalho, processos de oxidação avançada, Fe 2+ /H 2 O 2 e UV/H 2 O 2 , e de fotólise (UV) foram empregados na descoloração de dois efluentes sintéticos, contendo corantes tipo índigo e azo, e de um efluente de lavanderia industrial. Experimentalmente, soluções em concentração de 20 mg/L dos corantes índigo carmim e vermelho congo, respectivamente 43 µmol/L e 29 µmol/L, e o efluente têxtil (pH = 3) foram submetidos a diferentes condições oxidantes sob temperatura ambiente (27 ºC). As remoções de cor e de DQO foram avaliadas em cada sistema oxidativo estudado. Em geral, os resultados obtidos mostraram que os processos utilizados são muito promissores na descoloração dos efluentes. A descoloração completa das soluções foi alcançada nos processos Fenton e com UV/H 2 O 2 . Estudos cinéticos revelam que a taxa de descoloração em meio aquoso segue uma cinética de pseudo-primeira ordem em relação à concentração do corante.Palavras-chave: corantes sintéticos; efluente têxtil; processos de oxidação avançada; descoloração; cinética. AbstractIn the present work, advanced oxidation processes, Fe 2+ /H 2 O 2 and UV/H 2 O 2 , and direct photolysis (UV light) have been applied in the decolorization of two synthetic wastewater containing indigo and azo dyes and laundry effluent. Individual aqueous solutions containing 20 mg/L indigo carmine and congo red dyes (43 µmol/L and 29 µmol/L, respectively) and textile laundry wastewater at pH 3 were subjected to different experimental conditions in the oxidation reactions at room temperature (27 o C). Color and COD removals were evaluated for each oxidation systems. The results showed that the utilized processes are able to successfully decolorize the wastewaters. Complete bleaching was achieved by Fenton and UV/H 2 O 2 . Also, kinetics investigations revealed that the decolorization follows pseudo-first order kinetic with respect to the dye concentration.

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“…The main reasons are related to poisoning, reduction of the catalyst surface and, overall, leaching of iron [28][29][30][31][32]. Thus, the development of more active and stable catalysts represents nowadays one of the most important challenges in CWPO.…”

Section: Heterogeneous Fenton Processmentioning

confidence: 99%

“…Activated carbon has been, by far, the most studied support, probably due to its favorable properties such as high surface area, well developed porous structure, variable surface composition, good chemical resistance and acceptable cost [29,30]. 2.4 x 10 -3 min -1 , respectively).…”

Section: Magnetic Catalysts Prepared By In-situ Synthesis Of Magnetitementioning

confidence: 99%

Preparation of magnetite-based catalysts and their application in heterogeneous Fenton oxidation – A review

Muñoz

Pedro

Casas

et al. 2015

Applied Catalysis B: Environmental

625

268

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Esta es la versión de autor del artículo publicado en: This is an author produced version of a paper published in: AbstractThis study presents a critical review on the application of magnetite-based catalysts to industrial wastewater decontamination by heterogeneous Fenton oxidation. The use of magnetic materials in this field started only around 2008 and continues growing increasingly year by year. The potential of these materials derives from their higher ability for degradation of recalcitrant pollutants compared to the conventional iron-supported catalysts due to the presence of both Fe(II) and Fe(III) species. In addition, their magnetic properties allow their easy, fast and inexpensive separation from the reaction medium. The magnetic materials applied up to now can be classified in three general groups: magnetic natural minerals, in-situ-produced magnetic materials and ferromagnetic nanoparticles. A survey of the catalysts investigated so far is presented paying attention to their nature and competitive features in terms of activity and durability.2

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Catalytic wet peroxide oxidation of phenol with a Fe/active carbon catalyst

Cited by 287 publications

References 21 publications

Estudo de oxidação avançada de corantes básicos via reação Fenton (Fe2+/H2O2)

Estudo de oxidação avançada de corantes básicos via reação Fenton (Fe2+/H2O2)

Descoloração de efluentes aquosos sintéticos e têxtil contendo corantes índigo e azo via processos Fenton e foto-assistidos (UV e UV/H2O2)

Preparation of magnetite-based catalysts and their application in heterogeneous Fenton oxidation – A review

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