Wastewater Treatment by Heterogeneous Fenton-Like Processes in Continuous Reactors

Esteves, Bruno M.; Rodrigues, Carmen S.D.; Madeira, Luís M.

doi:10.1007/698_2017_81

Cited by 7 publications

(9 citation statements)

References 122 publications

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“…Besides the good perspective of heterogeneously catalyzed Fenton system at batch scale, further engineering research must be performed in continuous systems (fixed-bed, fluidized-bed and continuous stirred-tank reactors) in order to allow large-scale applications [2,11,16].…”

Section: A C C E P T E D Mmentioning

confidence: 99%

“…In recent years, more attention has been given towards their use in continuous treatment systems. configuration, along with a complete revision of the most relevant operating parameters [16].…”

Section: A C C E P T E D Mmentioning

confidence: 99%

“…However, it should be noted that this PZC value expands the possibilities of using the catalyst within a wider range of pH, closer to neutrality. This might allow its application in the treatment of real wastewaters (with typically neutral pH values), minimizing additional steps of pH adjustments [16,68]. In the following sections some other relevant aspects are also considered, as the incidence of different deactivation processes.…”

Section: Influence Of Main Operating Parametersmentioning

confidence: 99%

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Highly dispersed Fe3+-Al2O3 for the Fenton-like oxidation of phenol in a continuous up-flow fixed bed reactor. Enhancing catalyst stability through operating conditions

Luca

Massa

Grau

et al. 2018

Applied Catalysis B: Environmental

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Section: A C C E P T E D Mmentioning

confidence: 99%

Section: A C C E P T E D Mmentioning

confidence: 99%

Section: Influence Of Main Operating Parametersmentioning

confidence: 99%

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Highly dispersed Fe3+-Al2O3 for the Fenton-like oxidation of phenol in a continuous up-flow fixed bed reactor. Enhancing catalyst stability through operating conditions

Luca

Massa

Grau

et al. 2018

Applied Catalysis B: Environmental

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“…However, the CWPO process operated in batch reactors in the industry shows several drawbacks, such as low processing capacity arising from the intermittent operation, poor stability of catalysts due to excess accumulation of intermediates, mechanical wear of catalysts during reaction, and low recovery rate of catalysts from post‐treatment filtration 15‐17 . For continuous process that is industrially more preferable, the CWPO process in a fixed bed reactor (FBR) allows achieving high conversion per unit mass of catalysts and low operating cost, short residence time, and persistent‐usage of pelletized catalysts without post‐treatment filtration 18,19 …”

Section: Introductionmentioning

confidence: 99%

Degradation of MO and H₂O₂ on Cu/γ‐Al₂O₃ pellets in a fixed bed reactor: Kinetics and transport characteristics

et al. 2020

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Pelletized Cu catalysts (Cu/γ-Al 2 O 3) with different diameters (d p = 1.1-4.2 mm) were prepared and examined kinetically for methyl orange (MO) degradation using a fixed bed reactor. A Cu/γ-Al 2 O 3 catalyst (d p = 2.3 mm) exhibited high degradation activity (Conv. MO > 95%) and superior leaching resistance (Cu leaching <0.6 mg/L in 200 hr). Apparent kinetics showed that both MO degradation and H 2 O 2 decomposition were mainly controlled by internal mass transfer. A plug-flow reactor model with masstransfer coefficients was developed, and a modified empirical correlation for external mass transfer (Sh = 1.5Re' 1.10 Sc 0.42) was proposed to accurately describe the species transport from/to the catalyst pellets in the low Reynolds number regime. The model was verified against conversions of pollutants degradation and H 2 O 2 decomposition separately in a fixed bed with relative errors <5% compared with experimental data; thus, it could be used as an effective tool for further design and optimization of reactor configuration and reaction conditions for the continuous catalytic wet peroxide oxidation process.

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“…AOPs generate the hydroxyl radical (HO • ), responsible for oxidizing refractory organic compounds into non-toxic products, such as CO 2 and H 2 O [10,[25][26][27]. Given the high efficiency of the hydroxyl radical, the AOPs have been widely used, not only in wastewater treatment [9,19,[28][29][30], but also in soil and sediment remediation [31,32], decontamination of gaseous effluents containing volatile organic compounds and elimination of odors [33][34][35][36], water and groundwater treatment [37][38][39], and conditioning of municipal sludge [40,41].…”

Section: Introductionmentioning

confidence: 99%

Wastewater Treatment by Catalytic Wet Peroxidation Using Nano Gold-Based Catalysts: A Review

et al. 2019

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Nowadays, there is an increasing interest in the development of promising, efficient, and environmentally friendly wastewater treatment technologies. Among them are the advanced oxidation processes (AOPs), in particular, catalytic wet peroxidation (CWPO), assisted or not by radiation. One of the challenges for the industrial application of this process is the development of stable and efficient catalysts, without leaching of the metal to the aqueous phase during the treatment. Gold catalysts, in particular, have attracted much attention from researchers because they show these characteristics. Recently, numerous studies have been reported in the literature regarding the preparation of gold catalysts supported on various supports and testing their catalytic performance in the treatment of real wastewaters or model pollutants by CWPO. This review summarizes this research; the properties of such catalysts and their expected effects on the overall efficiency of the CWPO process, together with a description of the effect of operational variables (such as pH, temperature, oxidant concentration, catalyst, and gold content). In addition, an overview is given of the main technical issues of this process aiming at its industrial application, namely the possibility of using the catalyst in continuous flow reactors. Such considerations will provide useful information for a faster and more effective analysis and optimization of the CWPO process.

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Wastewater Treatment by Heterogeneous Fenton-Like Processes in Continuous Reactors

Cited by 7 publications

References 122 publications

Highly dispersed Fe3+-Al2O3 for the Fenton-like oxidation of phenol in a continuous up-flow fixed bed reactor. Enhancing catalyst stability through operating conditions

Highly dispersed Fe3+-Al2O3 for the Fenton-like oxidation of phenol in a continuous up-flow fixed bed reactor. Enhancing catalyst stability through operating conditions

Degradation of MO and H₂O₂ on Cu/γ‐Al₂O₃ pellets in a fixed bed reactor: Kinetics and transport characteristics

Wastewater Treatment by Catalytic Wet Peroxidation Using Nano Gold-Based Catalysts: A Review

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Wastewater Treatment by Heterogeneous Fenton-Like Processes in Continuous Reactors

Cited by 7 publications

References 122 publications

Highly dispersed Fe3+-Al2O3 for the Fenton-like oxidation of phenol in a continuous up-flow fixed bed reactor. Enhancing catalyst stability through operating conditions

Highly dispersed Fe3+-Al2O3 for the Fenton-like oxidation of phenol in a continuous up-flow fixed bed reactor. Enhancing catalyst stability through operating conditions

Degradation of MO and H2O2 on Cu/γ‐Al2O3 pellets in a fixed bed reactor: Kinetics and transport characteristics

Wastewater Treatment by Catalytic Wet Peroxidation Using Nano Gold-Based Catalysts: A Review

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Degradation of MO and H₂O₂ on Cu/γ‐Al₂O₃ pellets in a fixed bed reactor: Kinetics and transport characteristics