Nanocomposite Fe2O3/SBA-15: An efficient and stable catalyst for the catalytic wet peroxidation of phenolic aqueous solutions

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

doi:10.1016/j.cej.2006.12.007

Cited by 128 publications

(69 citation statements)

References 24 publications

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“…The main handicap of the process is the low pH value. It is required to avoid iron precipitation that takes place at high pH [154,155].…”

Section: Assessment Of Aops Performance For Antibiotic Removalmentioning

confidence: 99%

Treatment of Antibiotics in Wastewater Using Advanced Oxidation Processes (AOPs)

Kurt¹,

Mert²,

Özengi̇n³

et al. 2017

Physico-Chemical Wastewater Treatment and Resource Recovery

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Antibiotics are nonbiodegradable, can survive at aquatic environments for long periods and they have a big potential bio-accumulation in the environment. They are extensively metabolized by humans, animals and plants. After metabolization, antibiotics or their metabolites are excreted into the aquatic environment. Removal of these compounds from the aquatic environment is feasible by different processes. But antibiotics are not treated in conventional wastewater treatment plants efficiently. During the last years studies with advanced oxidation processes (AOPs) for removal of these pharmaceuticals from waters has shown that they can be useful for removing them fully. Advanced oxidation processes (AOPs) can work as alternatives or complementary method in traditional wastewater treatment, and highly reactive free radicals, especially hydroxyl radicals (OH) generated via chemical (O 3 /H 2 O 2 ,O 3 /OH -), photochemical (UV/O 3 ,O 3 /H 2 O 2 ) reactions, serve as the main oxidant. This study presents an overview of the literature on antibiotics and their removal from water by advanced oxidation processes. It includes almost all types of antibiotics which are consumed by human and veterinary processes. It was found that most of the investigated advanced oxidation treatment processes for the oxidation of antibiotics in water are direct and indirect photolysis with the combinations of H 2 O 2 ,TiO 2 , ozone and Fenton's reagent.

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“…The main handicap of the process is the low pH value. It is required to avoid iron precipitation that takes place at high pH [154,155].…”

Section: Assessment Of Aops Performance For Antibiotic Removalmentioning

confidence: 99%

Treatment of Antibiotics in Wastewater Using Advanced Oxidation Processes (AOPs)

Kurt¹,

Mert²,

Özengi̇n³

et al. 2017

Physico-Chemical Wastewater Treatment and Resource Recovery

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“…Unlike a homogeneous catalyst they have relatively higher oxidation efficiency and lower sensitivity to pH under equal reaction conditions. However, during oxidation most of them suffer from deactivation caused by the leaching of a metal cation in contact with a hot acidic medium used in heterogeneous catalytic oxidation 13,14,16,23,[27][28][29] . Therefore, the preparation of efficient and durable catalysts is still a challenge to the development of an advantageous catalyst for the oxidation for phenolic wastes.…”

Section: Introductionmentioning

confidence: 99%

Phenol oxidation with hydrogen peroxide using Cu/ZSM5 and Cu/Y5 catalysts

Valkaj

Wittine

Margeta

et al. 2011

Polish Journal of Chemical Technology

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In this work, catalytic activity and stability of Cu/Y5 and Cu/ZSM5 zeolites in phenol oxidation with hydrogen peroxide were examined. The catalyst samples were prepared by the ion exchange method of the protonic form of commercial zeolites. The catalysts were characterized by the powder X-ray diffraction (XRD), AAS, while the adsorption techniques were used to measure the specific surface area. The thermal programmed desorption of NH3 (NH3-TPD) was used for measuring the total number of acid sites formed on the surface of zeolites. Catalytic performance of the prepared samples was monitored in terms of phenol, hydrogen peroxide and total organic carbon (TOC) conversion, by-product distribution and a degree of copper leached into the aqueous solution.It was found that the activity of Cu/Y5 catalyst was generally higher than that of Cu/ZSM5 and that unlike Cu/ ZSM5, Cu/Y5 catalyzed phenol oxidation more completely.

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“…33 Total organic carbon (TOC) degradation over 75% was achieved at 373 K, hydrogen peroxide concentration of 3.8 g/L and a catalyst load of 0.6 g/L. In the present work, Fe/SBA-15 could achieve phenol analogue conversion of 50-80% in presence and 60-85% in the absence of H 2 O 2 at a lower temperature of 353 K, despite a higher dosage being employed (2 g L…”

Section: Methodsmentioning

confidence: 63%

Catalytic Oxidation of Phenol Analogues in Aqueous Medium Over Fe/SBA-15

Mayani¹,

Mayani²,

Kim³

2012

Bulletin of the Korean Chemical Society

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This study evaluated the use of iron-impregnated SBA-15 (Fe/SBA-15) as a catalyst for the oxidative degradation of persistent phenol analogues, such as 2-chlorophenol (2-CP), 4-chlorophenol (4-CP), 2-nitrophenol (2-NP), 4-nitrophenol (4-NP) and 2,4,6-trichlorophenol (2,4,6-TCP) in water. The oxidation reactions were carried out with reaction time, concentration of the phenols, amount of the catalysts, reaction temperature, pH of the reaction mixture as the process variables with or without using hydrogen peroxide as the oxidizing agent. The conversion achieved with Fe/SBA-15 at 353 K for 2-CP, 4-CP, 2-NP, 4-NP, 2,4,6-TCP was 80.2, 71.2, 53.1, 62.8, 77.3% in 5h with a reactant to H2O2 mole ratio of 1:1, and 85.7, 65.8, 61.9, 63.7, 78.1% in the absence of H2O2, respectively. The reactions followed pseudo first order kinetics. The leachability study indicated that the catalyst released very little iron into water and therefore, the possibility of secondary pollution is negligible.

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Nanocomposite Fe2O3/SBA-15: An efficient and stable catalyst for the catalytic wet peroxidation of phenolic aqueous solutions

Cited by 128 publications

References 24 publications

Treatment of Antibiotics in Wastewater Using Advanced Oxidation Processes (AOPs)

Treatment of Antibiotics in Wastewater Using Advanced Oxidation Processes (AOPs)

Phenol oxidation with hydrogen peroxide using Cu/ZSM5 and Cu/Y5 catalysts

Catalytic Oxidation of Phenol Analogues in Aqueous Medium Over Fe/SBA-15

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