Rapid and facile preparation of zinc ferrite (ZnFe2O4) oxide by microwave-solvothermal technique and its catalytic activity in heterogeneous photo-Fenton reaction

Anchieta, Chayene G.; Severo, Eric da Cruz; Rigo, Caroline; Mazutti, Márcio A.; Kuhn, Raquel C.; Müller, Edson I.; Flores, Érico M.M.; Moreira, Regina de Fátima Peralta Muniz; Foletto, Edson Luiz

doi:10.1016/j.matchemphys.2015.04.016

Cited by 68 publications

(20 citation statements)

References 56 publications

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“…Some methods used for dye removal from industrial wastewater are flotation 3 , filtration 4 , adsorption [5][6][7][8] and photocatalysis 9,10 . Among the various available methods, the adsorption process is one of the most effective techniques, which has been successfully employed for dye removal from wastewater [11][12][13][14][15][16][17] .…”

Section: Introductionmentioning

confidence: 99%

Use of Brazilian Kaolin as a Potential Low-cost Adsorbent for the Removal of Malachite Green from Colored Effluents

et al. 2017

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This study investigated the potential of Brazilian kaolin as a low-cost adsorbent for the removal of Malachite Green (MG) from colored effluents. The morphology, chemical structure and surface properties of the adsorbent were investigated by characterization techniques such as X-ray diffraction, N2 adsorption-desorption isotherms, Fourier transform infrared spectroscopy, X-ray fluorescence spectrometry, scanning electron microscopy, thermogravimetric analysis and particle size distribution. A possible technological application of raw kaolin is the MG removal from aqueous media, which was investigated using batch adsorption experiments. The adsorption kinetics was studied using the pseudo-first order, pseudo-second order and Elovich models. The adsorption isotherms were studied using the Langmuir, Freundlich and Sips models. The Elovich model was the more adequate to represent the adsorption kinetic, while the equilibrium was well represented by the Langmuir model. The maximum adsorption capacity, at pH of 6.3 and temperature of 25ºC, was 128 mg g -1 , and this satisfactory result may be associated with some adsorbent properties. Therefore, the results revealed that raw kaolin can be utilized as a promising low-cost adsorbent to remove MG from colored effluents.

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Section: Introductionmentioning

confidence: 99%

Use of Brazilian Kaolin as a Potential Low-cost Adsorbent for the Removal of Malachite Green from Colored Effluents

et al. 2017

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“…Heterogeneous photo-Fenton reaction has proved to be an emerging and promising technology for remediation of organic pollutant containing in liquid industrial effluents 1,2 . The technique consist in the use of iron-based catalysts which, in contact with hydrogen peroxide, and in the presence of light irradiation, produce highly oxidative radicals (HO • ) in aqueous solution 3 , leading to degradation of organic molecules.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Mesoporous Fe2O3-Supported ZSM-5 Zeolites by Carbon-Templating and their Evaluation as Photo-Fenton Catalysts to Degrade Organic Pollutant

et al. 2016

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Mesoporous Fe 2 O 3 -supported ZSM-5 zeolites were prepared by carbon-templating and subsequently evaluated as photo-Fenton catalysts to degrade a dye used as a model heavy organic pollutant. The synthesis procedure of the mesoporous ZSM-5 zeolites was performed employing a nucleating gel and carbon particles as mesopores template. Thereafter, the precursor salt of the iron oxide (Fe 2 O 3 ) was impregnated and then calcined to obtain the final catalyst. For comparison purposes, a conventional Fe 2 O 3 -supported ZSM-5 zeolite was also prepared. The results showed that the amount of intracrystalline mesopores formed in the ZSM-5 crystals was influenced by the amount of carbon added into the synthesis mixture. In comparison to the conventional prepared catalyst, the mesoporous Fe 2 O 3 /ZSM-5 ones showed an improved performance in the degradation of the target organic pollutant by the photo-Fenton reaction, which was attributed to the improvement of their textural properties as consequence of the mesopores generation.

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“…ZnFe 2 O 4 particles were synthesized by the microwave-assisted solvothermal route, which was recently developed in our laboratory [26]. Zn(NO 3 ) 2 ·6H 2 O and Fe(NO 3 ) 3 ·9H 2 O were used as precursor salts and ethylene glycol was used as a solvent.…”

Section: Synthesis and Characterization Of Znfe 2 O 4 Oxidementioning

confidence: 99%

“…The dye solutions (50 mL) with different initial concentrations (according to the statistical optimization; see Table 1) had the pH adjusted (according to the experimental design; Table 1) and, 0.025 g of ZnFe 2 O 4 was added. It is known that the acidic condition is required for a promising performance of the Fenton reaction [14,26]. The solutions were stirred in the dark at 100 rpm and 25˚C, until reaching the adsorption equilibrium.…”

Section: Photo-fenton Assaysmentioning

confidence: 99%

Statistical optimization of Reactive Red 141 removal by heterogeneous photo–Fenton reaction using ZnFe2O4 oxide prepared by microwave irradiation

Anchieta

Dotto

Mazutti

et al. 2016

Desalination and Water Treatment

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A B S T R A C TA statistical optimization of Reactive Red 141 (RR141) removal by heterogeneous photoFenton reaction using ZnFe 2 O 4 particles was performed. ZnFe 2 O 4 oxide was synthesized by microwave-assisted solvothermal route and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and N 2 adsorption-desorption isotherms. This material was used as a catalyst for the removal of RR141 dye from aqueous solution. Statistical optimization for the RR141 removal was performed using a 2 4−1 fractional experimental design, followed by the response surface methodology. Effects of pH, reaction time, dye concentration, and H 2 O 2 concentration were evaluated. ZnFe 2 O 4 particles presented a mesoporous structure with surface area of 65 m 2 g −1 . It was found that the more adequate conditions for the RR141 dye removal were pH 2.0, reaction time of 60 min, dye concentration of 60 mg L −1 , and H 2 O 2 concentration of 10 mM. In these conditions, 90% of color removal was achieved. The results demonstrate that the ZnFe 2 O 4 oxide is an efficient catalyst for the removal of RR141dye from aqueous solution through the heterogeneous photo-Fenton reaction.

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Rapid and facile preparation of zinc ferrite (ZnFe2O4) oxide by microwave-solvothermal technique and its catalytic activity in heterogeneous photo-Fenton reaction

Cited by 68 publications

References 56 publications

Use of Brazilian Kaolin as a Potential Low-cost Adsorbent for the Removal of Malachite Green from Colored Effluents

Use of Brazilian Kaolin as a Potential Low-cost Adsorbent for the Removal of Malachite Green from Colored Effluents

Preparation of Mesoporous Fe2O3-Supported ZSM-5 Zeolites by Carbon-Templating and their Evaluation as Photo-Fenton Catalysts to Degrade Organic Pollutant

Statistical optimization of Reactive Red 141 removal by heterogeneous photo–Fenton reaction using ZnFe2O4 oxide prepared by microwave irradiation

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