Iron–alumina synergy in the heterogeneous Fenton-type peroxidation of phenol solutions

Luca, Carla di; Ivorra, Fernando Daniel; Massa, Paola; Fenoglio, Rosa Juana

doi:10.1016/j.cej.2015.01.074

Cited by 43 publications

(27 citation statements)

References 43 publications

(56 reference statements)

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“…The reaction rate in the heterogeneous system is about 3.5 times higher than that in the homogeneous system and there also exists an induction time in Cu 2+ ‐H 2 O 2 , resulting in a relative low initial degradation rate. The Lewis acid sites on Al 2 O 3 can attract the electrons from copper atoms, leading to the increase in copper oxidation potential and thus facilitating the reduction of Cu 2+ by H 2 O 2 ; therefore, 5Cu/Al 2 O 3 ‐750 exhibited a superior activity toward H 2 O 2 for RhB degradation.…”

Section: Resultsmentioning

confidence: 99%

Fenton‐like degradation of rhodamine B over highly durable Cu‐embedded alumina: Kinetics and mechanism

Sheng

Sun

et al. 2017

AIChE Journal

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in Wiley Online Library (wileyonlinelibrary.com)Cu-embedded mesoporous alumina, as a Fenton-like catalyst prepared via a sol-gel method, showed excellent activity and durability for the degradation of refectory compounds. The origin of active sites for the generation of hydroxyl radicals (•OH) were thoroughly studied using multitechniques. Cu, as the only active element, could be penetrated into the bulk of alumina and some Cu atoms were embedded into the framework. The dynamic structure of surface Cu species (the variety of Cu 1 /Cu 21 ratio) during the reaction were determined as well. Furthermore, the structure plasticity of catalyst has proved by optimizing preparation and reaction conditions. A 98.53% degradation of RhB was recorded within 30 min, following a pseudo-first-order reaction rate expression. Electron spin resonance spectra and •OH scavenging experiments have confirmed that •OH is the main reactive oxidant for the elimination of RhB. By the surfaceenhanced Raman spectroscopy and gas chromatography-mass spectrometer results, plausible pathways of RhB degradation were elaborated.

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Section: Resultsmentioning

confidence: 99%

Fenton‐like degradation of rhodamine B over highly durable Cu‐embedded alumina: Kinetics and mechanism

Sheng

Sun

et al. 2017

AIChE Journal

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“…Catalysts were added into 20 mL of a phenol solution with a concentration of 250 ppm and 0.5 mL of H 2 O 2 (30% v/v), according to di Luca and collaborators (2015). 16 Tests were realized using 20, 10, 5 and 1 mg of catalysts, with duration varying from 1 to 4 h. A blank tested was realized using phenol (Sigma-Aldrich, 99%) and H 2 O 2 solutions, without the catalysts. 21 Further tests were performed by varying the phenol concentrations, using 1000, 500 and 125 ppm, in the reaction time of 4 hours.…”

Section: Catalytic Testmentioning

confidence: 99%

“…Figure 5 presents the Fenton tests done using 20 mg of catalyst ranging from 1 to 4 h. Results showed a high activity even in the first hours of reaction with almost 100 % of degradation of 4 h, similarly to results obtained in literature, who used Fe 2 O 3 supported on mesoporous -Al 2 O 3 , a material with very high surface area. 16 A blank test (phenol + H 2 O 2 , without catalyst) showed low phenol degradation (7% after 4 hours of reaction), suggesting that the H 2 O 2 decomposition occurs mainly on the surface of the material (Fe5 catalyst), since in the first hour of reaction, the phenol concentration was reduced to 94%, due to the consumption of approximately 20% of the initial H 2 O 2 , and consequently the phenol degradation was associated to the initial consumption of H 2 O 2 (3%). the greatest amount of OH radicals.…”

Section: Catalytic Test and Phenol Quantificationmentioning

confidence: 99%

Iron-doped Alfa-Alumina Applied in the Degradation of Phenol Solutions

Souza

Meireles²,

Cordeiro

et al. 2017

Rev. Virtual Quim.

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Resumo: Neste trabalho buscou-se avaliar a atividade catalítica de alumina dopada com ferro na degradação do fenol, pelo processo Fenton heterogêneo, que foi quantificado por dois métodos diferentes, Folin-Ciocalteu e cromatografia líquida de alta eficiência. A alumina foi caracterizada por difração de raios-X, espectroscopia de infravermelho, fluorescência de raios-X e área superficial pelo método de BET. Após os testes catalíticos, foi observado que houve degradação de 94 % do fenol com duas horas de reação, chegando ao máximo de 99 % com quatro horas. Esta alumina foi reutilizada por três vezes para o mesmo processo catalítico, mantendo o percentual de degradação após quatro horas de reação. A estabilidade química do material foi avaliada e observou-se que não há lixiviação do ferro. Palavras-chave:Alumina dopada com ferro; Fenol; Degradação. AbstractThis work aimed at evaluating the catalytic activity of alumina doped with iron in phenol degradation by Fenton heterogeneous process, which was quantified by two different methods, Folin-Ciocalteu and high-performance liquid chromatography. The alumina was characterized by X-ray diffraction, infrared spectroscopy, X-ray fluorescence, and surface area measurement by the BET method. After the catalytic tests, the phenol degradation of 94 % was obtained after two hours of reaction, reaching a maximum of 99 % after four hours. This alumina was reused three times for the same catalytic process, maintaining the percentage of degradation after four hours of reaction. The chemical stability of the material was assessed no iron leaching was noticed.

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“…Similarly, Fenoglio et al. experimented iron oxide supported alumina as heterogeneous Fenton catalyst for the degradation of high concentration of phenol up to 5000 ppm . It was observed that under a constant iron loading (4 wt%) the increased alumina support favors the iron oxide dispersion which led to the high degradation of phenol due to the synergistic effect of Fe/Al interactions with improved leaching stability of the catalyst.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Stability of Abundant Amorphous Iron (III) oxide Grafted AlSBA‐15 as Highly Efficient Heterogeneous Fenton Catalyst for the Destruction of Phenol

Thirumoorthy

Satishkumar

2019

ChemistrySelect

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24 wt% of iron has been successfully grafted as amorphous iron oxide over mesoporous channels of SBA‐15 and 10 wt% alumina coated SBA‐15 (AlSBA‐15) using selective extraction deposition (SED) technique. The synthesized materials have been characterized using XRD, N2 adsorption studies, SEM‐EDS, 27Al MAS NMR, XPS, H2‐TPR, and HR‐TEM techniques. 27Al MAS NMR and XPS characterization results revealed that iron has been preferentially grafted over alumina. The increased binding energy of the Fe2p electron (XPS) in the 24wt %Fe/AlSBA‐15 confirms the existence of strong donor‐acceptor interaction between grafted iron oxide and an alumina support. In TPR studies, unlike silica support, AlSBA‐15 tuned the reduction property of various grafted oxidic iron species, which is evidenced by shifting of iron reduction peak to a high temperature of 436 °C. In the destruction of 200 ppm of phenol 24wt %Fe/AlSBA‐15 catalyst demonstrated 100% phenol conversion and 86% TOC removal with 0.4 ppm (0.1%) iron leaching within 30 minutes of reaction. 24wt %Fe/SBA‐15 catalyst also exhibited similar performance however, leaching of iron was found to be up to 20 ppm (8%). The 24wt %Fe/AlSBA‐15 catalyst was recycled successfully five times without loss in the catalytic activity and stability.

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Iron–alumina synergy in the heterogeneous Fenton-type peroxidation of phenol solutions

Cited by 43 publications

References 43 publications

Fenton‐like degradation of rhodamine B over highly durable Cu‐embedded alumina: Kinetics and mechanism

Fenton‐like degradation of rhodamine B over highly durable Cu‐embedded alumina: Kinetics and mechanism

Iron-doped Alfa-Alumina Applied in the Degradation of Phenol Solutions

Enhanced Stability of Abundant Amorphous Iron (III) oxide Grafted AlSBA‐15 as Highly Efficient Heterogeneous Fenton Catalyst for the Destruction of Phenol

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