Adsorption and oxidation of PCP on the surface of magnetite: Kinetic experiments and spectroscopic investigations

Xue, Xiaofei; Hanna, Khalil; Abdelmoula, Mustapha; Deng, Nansheng

doi:10.1016/j.apcatb.2008.12.024

Cited by 235 publications

(109 citation statements)

References 39 publications

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“…In the present work, the high concentration of Fe 3 O 4 may have scavenged the SO 4 • − , leading to the transformation of the radical into the sulfate anion (SO 4 2− ). This scavenging effect was also observed in previous studies for the heterogeneous Fenton reaction at a high loading of Fe 3 O 4 (Xue et al, 2009a(Xue et al, , 2009b). …”

Section: Oxidation Of Ibpsupporting

confidence: 88%

“…The Tristar 3000 from Quantachrome Instruments was used to determine the specific surface area of Fe 3 O 4 by Nitrogen Brunauer-Emmett-Teller (N 2 -BET) analysis. The point of zero charge (pzc) of Fe 3 O 4 was determined through potentiometric titrations (Xue et al, 2009a).…”

Section: Characterization Of Iron(ii Iii) Oxidementioning

confidence: 99%

“…1a. Five diffraction peaks at 2θ = 21.2°, 35°, 41.2°, 50.4°and 62.8°could be assigned to Fe 3 O 4 , (Schwertmann and Cornell, 2000 (Xue et al, 2009a). It has a cubic spinel structure with iron in both tetrahedral and octahedral sites.…”

Section: Characterization Of Fe 3 Omentioning

confidence: 99%

“…In order to determine the role of Fe 3 O 4 on the kinetics of IBP removal, oxidation experiments were carried out using a higher oxidant concentration (10 mM) over a longer time frame (48 h) as proposed in a previous work (Xue et al, 2009a). As illustrated in Fig.…”

Section: Kinetic Of Ibp Removal Using Fe 3 Omentioning

confidence: 99%

“…In addition, Fe 3 O 4 exhibited excellent structural and catalytic stabilities. Fe 3 O 4 can be magnetically recovered and reused for several oxidation cycles; it is abundant in environmental settings and has a low solubility in aqueous solution (Schwertmann and Cornell, 2000;Xue et al, 2009aXue et al, , 2009c. To date, the use of Fe 3 O 4 (the most stable mixed valence oxide), to activate PS or H 2 O 2 , has not been tested for IBP removal.…”

Section: Introductionmentioning

confidence: 99%

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Chemical oxidation of ibuprofen in the presence of iron species at near neutral pH

Sabri

Hanna

Yargeau

2012

Science of The Total Environment

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The objective of this work was to evaluate the removal of ibuprofen (IBP) using the oxidants hydrogen peroxide (H 2 O 2 ) and sodium persulfate (Na 2 S 2 O 8 ). The ability of magnetite (Fe 3 O 4 ) to activate persulfate (PS) and H 2 O 2 for the oxidation of IBP at near neutral pH was evaluated as well. The use of soluble Fe 2+ to activate H 2 O 2 and Na 2 S 2 O 8 was also investigated. H 2 O 2 and Na 2 S 2 O 8 were inactive during the sixty-minute experiments when used alone. However, activation using Fe 2+ increased the removal to 95% in the presence of H 2 O 2 (Fenton reaction) and 63% in the presence of Na 2 S 2 O 8 at pH 6.6. Chemical oxygen demand (COD) removal was also greater for Fenton oxidation (65%) than for iron-activated PS oxidation (25%). Activation of H 2 O 2 and PS by Fe 3 O 4 was only observed at a high oxidant concentration and over 48 h of reaction time. A second order rate kinetic constant was determined for H 2 O 2 (3.0 * 10 − 3 M − 1 s − 1 ) and Na 2 S 2 O 8 (1.59 * 10 − 3 M − 1 s − 1 ) in the presence of Fe 3 O 4 . Finally, several of the degradation products formed during oxidation of IBP in the presence of H 2 O 2 and Na 2 S 2 O 8 (activated by Fe 2+ ) were identified. These include oxalic acid, pyruvic acid, formic acid, acetic acid, 4-acetylbenzoic acid, 4-isobutylacetophenone (4-IBAP) and oxo-ibuprofen.

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Section: Oxidation Of Ibpsupporting

confidence: 88%

Section: Characterization Of Iron(ii Iii) Oxidementioning

confidence: 99%

Section: Characterization Of Fe 3 Omentioning

confidence: 99%

Section: Kinetic Of Ibp Removal Using Fe 3 Omentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chemical oxidation of ibuprofen in the presence of iron species at near neutral pH

Sabri

Hanna

Yargeau

2012

Science of The Total Environment

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Nanocatalytic Wastewater Treatment System for the Removal of Toxic Organic Compounds

Sadjadi

2014

Nanomaterials for Environmental Protection

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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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Adsorption and oxidation of PCP on the surface of magnetite: Kinetic experiments and spectroscopic investigations

Cited by 235 publications

References 39 publications

Chemical oxidation of ibuprofen in the presence of iron species at near neutral pH

Chemical oxidation of ibuprofen in the presence of iron species at near neutral pH

Nanocatalytic Wastewater Treatment System for the Removal of Toxic Organic Compounds

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

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Adsorption and oxidation of PCP on the surface of magnetite: Kinetic experiments and spectroscopic investigations

Cited by 235 publications

References 39 publications

Chemical oxidation of ibuprofen in the presence of iron species at near neutral pH

Chemical oxidation of ibuprofen in the presence of iron species at near neutral pH

Nanocatalytic Wastewater Treatment System for the Removal of Toxic Organic Compounds

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

Contact Info

Product

Resources

About

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