Effect of chelating agent on the oxidation rate of PCP in the magnetite/H2O2 system at neutral pH

Xue, Xiaofei; Hanna, Khalil; Despas, Christelle; Wu, Feng; Deng, Nansheng

doi:10.1016/j.molcata.2009.06.016

Cited by 232 publications

(95 citation statements)

References 39 publications

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“…BrO 3 À is also a strong oxidant that can be reduced to Br À in water by reduced iron species (Fe 2+ or Fe 0 ) [8]. Moreover, our and other studies have verified that more Fe(II) could be generated from the reaction of Fe(III) and HO 2 ÅÀ /O 2 ÅÀ due to the complexation of Fe(III) with the oxygen functional groups (-OH and -COOH) of intermediates [20,21] [22,23]. Thus, it is necessary to investigate the degradation process of organic compounds with different structure and its influence on the minimization of BrO 3 À formation in catalytic ozonation.…”

Section: Introductionsupporting

confidence: 65%

Enhanced inhibition of bromate formation in catalytic ozonation of organic pollutants over Fe–Al LDH/Al2O3

Nie

2015

Separation and Purification Technology

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a b s t r a c tFe-Al layered double hydroxides (Fe-Al LDH, the molar ratio of Fe(II) to Fe(III) was about 1:10) was successfully supported and highly dispersed on mesoporous Al 2 O 3 based on the X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis. Fe-Al LDH/Al 2 O 3 was more efficient in inhibiting BrO 3 À formation and removing organic pollutant taking ozonation alone as control. Further investigation indicated that BrO 3 À reduction by surface Fe(II) was responsible to the complete inhibition of BrO 3 À formation.

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Section: Introductionsupporting

confidence: 65%

Enhanced inhibition of bromate formation in catalytic ozonation of organic pollutants over Fe–Al LDH/Al2O3

Nie

2015

Separation and Purification Technology

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“…Among them, the application of magnetite magnetite provides high activity in oxidation processes. So far, it has been successfully tested in the oxidation of a wide variety of non-biodegradable organic pollutants such as trinitrophenol [40], pentachlorophenol [48], phenol [49], tetrabromobisphenol-A [50], various dyes [51] and polycyclic aromatic hydrocarbons [52]. Maghemite presents the same structure as magnetite, it is also spinel ferrite and ferromagnetic.…”

Section: Magnetic Natural Mineralsmentioning

confidence: 99%

“…The efficiency of CWPO with iron minerals has been found to depend greatly on the dissolution of iron from the solid [40,43,44,48,54]. Therefore, the iron mineral is used as dissolved iron source and the oxidation proceeds mostly via homogeneous Fenton.…”

Section: Magnetic Natural Mineralsmentioning

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

649

274

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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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“…Fe II -bearing minerals like magnetite (Fe 3 O 4 ) were found to be the most effective catalyst as compared to the only Fe III oxides for heterogeneous catalytic oxidation of organic pollutants (Ahmad et al, 2010;Matta et al, 2007Matta et al, , 2008bXue et al, 2009bXue et al, , 2009c. In addition, Fe 3 O 4 exhibited excellent structural and catalytic stabilities.…”

Section: Introductionmentioning

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%

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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Effect of chelating agent on the oxidation rate of PCP in the magnetite/H2O2 system at neutral pH

Cited by 232 publications

References 39 publications

Enhanced inhibition of bromate formation in catalytic ozonation of organic pollutants over Fe–Al LDH/Al2O3

Enhanced inhibition of bromate formation in catalytic ozonation of organic pollutants over Fe–Al LDH/Al2O3

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

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

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