Fenton-like oxidation of azo dye in aqueous solution using magnetic Fe 3 O 4 -MnO 2 nanocomposites as catalysts

Fang, Zhaosong; Zhang, Kai; Liu, Jie; Fan, Junyu; Zhao, Zhiwei

doi:10.1016/j.wse.2017.10.005

Cited by 45 publications

(22 citation statements)

References 35 publications

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“…It was previously reported that 56% TOC removal was achieved after 4 h of treatment on an improved wet oxidation system . Besides, Fang et al . reported that the TOC removal rate of AO7 was 46.5% after treatment for 120 min on an Fe 3 O 4 ‐MnO 2 core‐shell nanocomposite heterogeneous Fenton‐like system.…”

Section: Resultsmentioning

confidence: 94%

“…It was previously reported that 56% TOC removal was achieved after 4 h of treatment on an improved wet oxidation system. 56 Besides, Fang et al 57 reported that the TOC removal rate of AO7 was 46.5% after treatment for 120 min on an Fe 3 O 4 -MnO 2 core-shell nanocomposite heterogeneous Fenton-like system. Therefore these findings revealed that the reactions could not completely decompose AO7 into CO 2 and H 2 O but formed some intermediates which need further study.…”

Section: Catalytic Evaluationmentioning

confidence: 99%

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Efficient degradation of Acid Orange 7 by persulfate activated with a novel developed carbon‐based MnFe₂O₄ composite catalyst

Liu

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND A novel carbon‐based modified MnFe2O4 catalyst was first developed to produce sulfate radicals (SO4−•) by activation of persulfate (PS). The catalyst was fabricated with a mixture of MnFe2O4 nanoparticles and chitosan (which could form a large amount of carbon‐based biomass after pyrolysis) annealed at 600 °C and was referred to as CM‐600. RESULTS The microstructure of the composite catalyst CM‐600 showed that MnFe2O4 was supported on the surface of carbon‐based sheets. After modification by pyrolysis, the specific surface area of MnFe2O4 enlarged significantly and thus the contact area between catalyst and PS increased. X‐ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy and X‐ray photoelectron spectroscopy were used to characterize the components of CM‐600. In comparison with the MnFe2O4/PS system, the activation of PS by CM‐600 was enhanced prominently, while 99.0% Acid Orange 7 (AO7) removal was achieved after reacting for 30 min. Investigations of influencing factors indicated the optimal treatment parameters. The two reactive species in the degradation process, namely free radicals (SO4−• and hydroxyl radicals (•OH)) and non‐radicals (singlet oxygen, 1O2), were confirmed by quenching tests and electron spin resonance spectroscopy. The corresponding degradation mechanism was proposed and SO4−• was generated primarily via the activation of PS by MnII and FeII. CONCLUSION The research demonstrated that the composite catalyst CM‐600 improved the property of MnFe2O4 for catalyzing PS and thus enlarged the practical application of SO4−• oxidation technology in pollutant degradation in aqueous environments. © 2019 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 94%

Section: Catalytic Evaluationmentioning

confidence: 99%

Efficient degradation of Acid Orange 7 by persulfate activated with a novel developed carbon‐based MnFe₂O₄ composite catalyst

Liu

et al. 2019

J of Chemical Tech & Biotech

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“…Additionally, the intermediates which were produced during the reaction may cause the generation of the secondary radicals, thus consuming SO 4 −• . This may have an effect on the competition between dye molecules and its byproducts in reacting with reactive radicals [47]. Therefore, the removal of dye declined at high dye concentrations in the process of the PF like-AC/CFO; kinetics of degradation is necessary for the optimization of conditions.…”

Section: Effect Of Initial Dye Concentration and Kinetics Of Degradatmentioning

confidence: 99%

Photo-Fenton like Catalyst System: Activated Carbon/CoFe2O4 Nanocomposite for Reactive Dye Removal from Textile Wastewater

et al. 2019

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The removal of dye from textile industry wastewater using a photo-Fenton like catalyst system was investigated wherein the removal efficiency of phenol and chemical oxygen demand (COD) was studied by varying various parameters of pH (3–11), reaction time (1–50 min), activated Carbon/CoFe2O4 (AC/CFO) nanocomposite dosage (0.1–0.9 g/L), and persulfate amount (1–9 mM/L). The highest removal rates of reactive red 198 and COD were found to be 100% and 98%, respectively, for real wastewater under the optimal conditions of pH = 6.5, AC/CFO nanocomposite dosage (0.3 g/L), reaction time, 25 min, and persulfate dose of 5 mM/L up on constant UV light irradiation (30 W) at ambient room temperature. The result showed that this system is a viable and highly efficient remediation protocol relative to other advanced oxidation processes; inexpensive nature, the ease of operation, use of earth-abundant materials, and reusability for removal of organic pollutants being the salient attributes.

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“…Previous studies included various methods for paraquat removal, such as adsorption on modified zeolites, activated carbon, and organoclay (Guégan et al, 2015;Sieliechi and Thue, 2015;Keawkumay et al, 2016;Pukcothanung et al, 2018). On the other hand, physicochemical processes using titanium dioxide, ozone, and various advanced oxidation processes showed potential for paraquat removal and reduction of the physical and chemical effects of this pesticide on the environment and health (Florêncio et al, 2004;Mandal et al, 2010;Wang and Xu, 2012;Deng and Zhao, 2015;Hamad et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…The advanced oxidation process (AOP) is a conventional method for paraquat degradation based on the generation of highly reactive and non-selective hydroxyl radicals (•OH) (Poyatos et al, 2009;Deng and Zhao, 2015;de Guimarães et al, 2016;Vagi and Petsas, 2017;Garrido-Cardenas et al, 2020). The high oxidative power of this radical can oxidize organic compounds to CO 2 and H 2 O in aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

Paraquat Degradation by Biological Manganese Oxide (BioMnOx) Catalyst Generated From Living Microalga Pediastrum duplex AARL G060

Thongpitak

Pumas

2020

Front. Microbiol.

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Paraquat is a non-selective fast-acting herbicide used to control weeds in agricultural crops. Many years of extensive use has caused environmental pollution and food toxicity. This agrochemical degrades slowly in nature, adsorbs onto clay lattices, and may require environmental remediation. Studies have shown that biosynthesized manganese oxide (BioMnO x) successfully degraded toxic synthetic compounds such as bis-phenol A and diclofenac, thus it has potential for paraquat degradation. In this experiment, P. duplex AARL G060 generated low (9.03 mg/L) and high (42.41 mg/L) concentrations of BioMnO x. The precipitated BioMnO x was observed by scanning electron microscopy (SEM), and the elemental composition was identified as Mn and O by energy-dispersive x-ray spectroscopy (EDS). The potential for BioMnO x to act as a catalyst in the degradation of paraquat was evaluated under three treatments: (1) a negative control (deionized water), (2) living alga with low BioMnO x plus hydrogen peroxide, and (3) living alga with high BioMnO x plus hydrogen peroxide. The results indicate that BioMnO x served as a catalyst in the Fenton-like reaction that could degrade more than 50% of the paraquat within 72 h. A kinetic study indicated that paraquat degradation by Fenton-like reactions using BioMnO x as a catalyst can be described by pseudo-first and pseudosecond order models. The pH level of the BioMnO x catalyst was neutral at the end of the experiment. In conclusion, BioMnO x is a viable and environmentally friendly catalyst to accelerate degradation of paraquat and other toxic chemicals.

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Fenton-like oxidation of azo dye in aqueous solution using magnetic Fe 3 O 4 -MnO 2 nanocomposites as catalysts

Cited by 45 publications

References 35 publications

Efficient degradation of Acid Orange 7 by persulfate activated with a novel developed carbon‐based MnFe₂O₄ composite catalyst

Efficient degradation of Acid Orange 7 by persulfate activated with a novel developed carbon‐based MnFe₂O₄ composite catalyst

Photo-Fenton like Catalyst System: Activated Carbon/CoFe2O4 Nanocomposite for Reactive Dye Removal from Textile Wastewater

Paraquat Degradation by Biological Manganese Oxide (BioMnOx) Catalyst Generated From Living Microalga Pediastrum duplex AARL G060

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Fenton-like oxidation of azo dye in aqueous solution using magnetic Fe 3 O 4 -MnO 2 nanocomposites as catalysts

Cited by 45 publications

References 35 publications

Efficient degradation of Acid Orange 7 by persulfate activated with a novel developed carbon‐based MnFe2O4 composite catalyst

Efficient degradation of Acid Orange 7 by persulfate activated with a novel developed carbon‐based MnFe2O4 composite catalyst

Photo-Fenton like Catalyst System: Activated Carbon/CoFe2O4 Nanocomposite for Reactive Dye Removal from Textile Wastewater

Paraquat Degradation by Biological Manganese Oxide (BioMnOx) Catalyst Generated From Living Microalga Pediastrum duplex AARL G060

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Efficient degradation of Acid Orange 7 by persulfate activated with a novel developed carbon‐based MnFe₂O₄ composite catalyst

Efficient degradation of Acid Orange 7 by persulfate activated with a novel developed carbon‐based MnFe₂O₄ composite catalyst