Heterogeneous catalytic oxidation for the degradation of p -nitrophenol in aqueous solution by persulfate activated with CuFe 2 O 4 magnetic nano-particles

Li, Jun; Ren, Yi; Ji, Fangzhou; Lai, Bo

doi:10.1016/j.cej.2017.04.104

Cited by 341 publications

(82 citation statements)

References 57 publications

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“…Second, results from former studies show the conversion of valence states between Fe and Cu in CuFe 2 O 4. The electron transfer capability was remarkably enhanced after the structural modification . The electro‐transformations between ≡Fe(II) and ≡Fe(III), ≡Cu(I) and ≡Cu(II), and ≡Fe(III) and ≡Cu(I) were strengthened.…”

Section: Resultssupporting

confidence: 87%

“…. The binding energies at 934.1 and 711.9 eV in CuFe 2 O were attributed to Cu (II) (Cu 2p3/2), Fe (III) (Fe 2p3/2), and the species of dominant Cu(II) oxide . Furthermore, Cu(I) and Fe(II) in the surface of CuFe 2 O 4 increased with varying degrees.…”

Section: Resultsmentioning

confidence: 99%

“…However, the application of CuFe 2 O 4 to activating PS is rarely investigated. Only Li et al . reported the remarkable efficiency of CuFe 2 O 4 in activating PS to degrade p ‐nitrophenol after addition of an amount of catalyst (30 g L −1 ) and the catalyst:contaminant ratio was reached 600.…”

Section: Introductionmentioning

confidence: 99%

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Structurally modified CuFe₂O₄/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition

Zhang

Dong

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND: Iron (Fe)-copper (Cu) bimetallic catalysts such as CuFe 2 O 4 , CuFeO 2 and CuO/Fe 3 O 4 have been widely applied in persulfate oxidization process. Among these catalysts, CuFe 2 O 4 has shown excellent performance in catalyzing peroxymonosulfate. However, because the catalytic effect of CuFe 2 O 4 on persulfate (PS) is not obvious, the application of CuFe 2 O 4 to activate persulfate has been investigated only rarely. Hence, structural modification has been applied in order to improve the catalytic activity of CuFe 2 O 4 on persulfate.RESULT: In this study, Oxygen (O)-deficient CuFe 2 O 4 was synthesized via the hydrogen reduction method and first used to activate PS for degrading acetaminophen (APAP) in aqueous solution with low catalyst concentration of 0.3 g L −1 . Results reveal that high-concentration APAP (100 mg L −1 ) could be efficiently removed by O-deficient CuFe 2 O 4 -activated PS, and 91% removal rate could be reached in 60 min using 0.8 g L −1 PS and 0.3 g L −1 catalyst under unadjusted pH. Dissolved O 2 and Cl − showed inhibitory effects on the degradation process. Radical scavenger experiments, in which methanol, tert-butyl alcohol (TBA) and nitrobenzene (NB) were used as radical trappers, indicated that SO 4 − and OH were the active radicals in the reaction, but the main radical was SO 4 − . Oxygen-deficient CuFe 2 O 4 showed strong reduction ability and could activate PS efficiently, and the electron transfer capability was remarkably enhanced after this structural modification. CONCLUSIONS: Results indicated that compared to the pristine crystal, the catalytic activity of CuFe 2 O 4 could be improved through structural modification. Additionally, the structurally modified catalyst showed high potential to treat wastewater with high antibiotic content under mild conditions. Romero A. Oxidation of priority and emerging pollutants with persulfate activated by iron: effect of iron valence and particle size. Chem Eng J 318:197-205 (2017).J Chem Technol Biotechnol 2019; 94: 785-794

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

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Structurally modified CuFe₂O₄/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition

Zhang

Dong

et al. 2018

J of Chemical Tech & Biotech

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“…Metals or metal-based materials are the common catalysts to activate PS for oxidizing organic pollutants [12,15]. However, the disadvantage of high cost, high toxicity and the reuse problem limit practical applications of metal catalysts [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…Spinel ferrite particles with formula MFe 2 O 4 (M=Mn, Co, Ni, and Cu, etc), have been suggested as powerful catalysts for organic pollutants treatment processes [17,[19][20][21]. Among these catalysts, copper ferrite (CuFe 2 O 4 ) has achieved more attention because it shows chemical and thermal stabilities, magnetically separable properties and high capability of producing active radicals [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Catalytic degradation of Acid Orange 7 in water by persulfate activated with CuFe₂O₄@RSDBC

Guan

Zhou

Zhang

et al. 2020

Mater. Res. Express

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In this study, a novel series of rectorite/sludge derived biochar (RSDBC) supporting CuFe 2 O 4 (CuFe 2 O 4 @RSDBC) composites were prepared as an effective catalyst to active persulfate (PS) for the removal of Acid Orange 7 (AO7) in water. The character of catalyst was analyzed by scanning electron microscope (SEM), transmission electron microscopy (TEM), fourier transform infrared spectroscopy (FTIR) and x-ray diffraction (XRD). Various influencing factors including initial pH, PS concentration, catalyst dosage, initial dye concentration and reaction temperature were investigated. The optimal reaction conditions were found to be: PS concentration 2 mM; catalyst dosage 0.6 g l −1 ; initial pH value 7.0 and 25°C of reaction temperature. Further radical quenching tests were performed by using ethanol, tert-butanol (TBA) and benzoquinone (BQ), which confirmed that sulfate radicals ( -SO 4 · ) and hydroxyl radicals (HO•−) were the reactive species in the degradation process. The Gas chromatography-mass spectrometry (GC-MS) analysis was employed to determine the intermediate products and a plausible degradation pathway is proposed. In addition, the CuFe 2 O 4 @RSDBC sample exhibited high color removal ability (95%) and stable performance after three successive runs. At last, the catalyst proved a good removal effect for actual dye wastewater. These results indicate that CuFe 2 O 4 @RSDBC hybrids could be as effective catalysts for PS activation on dye pollutants elimination. List of abbreviationsAcronyms RSDBC rectorite/sludge derived biochar AO7 acid orange 7 AOP advanced oxidation process SEM scanning electron microscope TEM transmission electron microscope FTIR fourier transform infrared spectroscopy GC-MS gas chromatography-mass spectrometer PS persulfate XRD x-ray diffraction GAC granular activated carbon REC rectorite SS sewage sludge BET Brunauer-Emmett-Teller

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Isolated iron/polyether sulfone catalytic membranes for rapid phenol removal

Huang

Wang

Chen

et al. 2021

J of Applied Polymer Sci

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Phenolic waster has a pervasive problem afflicting people throughout the word due to negative impacts for ecosystems and humans. Herein, isolated iron/ polyethersulfone (4A-Fe/PES) mixed-matrix membrane as a catalytic nonpermselective membrane reactor is developed for rapid reduction of phenol in continuous flow-through reaction. The forced flow of the reactants through the membrane intensifies the contact between reactants and immobilized catalysts, allowing for high catalytic activity with negligible mass transport resistances. In the presence of H 2 O 2 , the 4A-Fe/PES catalytic membrane can remove 99.9 ± 1.6% phenol after 6 min at pH 2 with a catalyst/phenol mass ratio of 1/3. The catalytic membranes show much higher performances than 4A-Fe particles even under neutral or alkaline conditions. In particular, at pH 9, the catalytic membrane exhibits a phenol degradation rate of 92.5 ± 3.4% after 12 h. This strategy provides guidance to the design of highperformance catalytic membranes for efficient removal of phenolic pollutants.

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Heterogeneous catalytic oxidation for the degradation of p -nitrophenol in aqueous solution by persulfate activated with CuFe 2 O 4 magnetic nano-particles

Cited by 341 publications

References 57 publications

Structurally modified CuFe₂O₄/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition

Structurally modified CuFe₂O₄/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition

Catalytic degradation of Acid Orange 7 in water by persulfate activated with CuFe₂O₄@RSDBC

Isolated iron/polyether sulfone catalytic membranes for rapid phenol removal

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Heterogeneous catalytic oxidation for the degradation of p -nitrophenol in aqueous solution by persulfate activated with CuFe 2 O 4 magnetic nano-particles

Cited by 341 publications

References 57 publications

Structurally modified CuFe2O4/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition

Structurally modified CuFe2O4/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition

Catalytic degradation of Acid Orange 7 in water by persulfate activated with CuFe2O4@RSDBC

Isolated iron/polyether sulfone catalytic membranes for rapid phenol removal

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Product

Resources

About

Structurally modified CuFe₂O₄/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition

Structurally modified CuFe₂O₄/persulfate process for acetaminophen scavenging: high efficiency with low catalyst addition

Catalytic degradation of Acid Orange 7 in water by persulfate activated with CuFe₂O₄@RSDBC