Adsorption and heterogeneous Fenton degradation of 17α-methyltestosterone on nano Fe3O4/MWCNTs in aqueous solution

Hu, Xiaobin; Liu, Benzhi; Deng, Yulin; Chen, Hongzhe; Luo, Si; Sun, Cheng; Yang, Po Wei; Yang, Shaogui

doi:10.1016/j.apcatb.2011.07.025

Cited by 399 publications

(185 citation statements)

References 59 publications

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“…Some researchers believe that high-valent iron species, i.e., ferryl(IV), are produced in heterogeneous Fenton systems, especially at neutral or basic pH or in the presence of ligands (Gonzalez-Olmos et al, 2011;Hu et al, 2011;Katsoyiannis et al, 2008;Keenan and Sedlak, 2008;Luo et al, 2010), where high-valent iron is more stable (Diane and Virender, 2008). Though the generation mechanism of surface Fe(IV) (e.g., ≡Fe IV = O) in heterogeneous Fenton systems remains unknown, Eq.…”

Section: High-valent Iron Speciesmentioning

confidence: 99%

Interfacial mechanisms of heterogeneous Fenton reactions catalyzed by iron-based materials: A review

Yang

Men

et al. 2016

Journal of Environmental Sciences

424

153

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The heterogeneous Fenton reaction can generate highly reactive hydroxyl radicals (UOH) from reactions between recyclable solid catalysts and H 2 O 2 at acidic or even circumneutral pH. Hence, it can effectively oxidize refractory organics in water or soils and has become a promising environmentally friendly treatment technology. Due to the complex reaction system, the mechanism behind heterogeneous Fenton reactions remains unresolved but fascinating, and is crucial for understanding Fenton chemistry and the development and

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Section: High-valent Iron Speciesmentioning

confidence: 99%

Interfacial mechanisms of heterogeneous Fenton reactions catalyzed by iron-based materials: A review

Yang

Men

et al. 2016

Journal of Environmental Sciences

424

153

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“…In the range below 800 cm −1 , some bands including 215.9, 273.3, 390.7, 482.3 and 642.1 cm −1 appear in the spectrum of M3. These bands are also observed in the composite of Fe 3 O 4 /MWCNTs and attributed to the vibration modes of Fe-O and Fe-C bonds [5]. There is no observable Raman mode at around 300 or 410 cm −1 , indicating the absence of hematite phase in the composite [38,39].…”

Section: Characterizations Of Adsorbentsmentioning

confidence: 70%

“…The superparamagnetic Fe 3 O 4 nanoparticles possess excellent adsorption capacity for arsenic removal [17], and the performance was much improved when they are dispersed over RGO to form a hybrid adsorbent [23]. In addition, considering the accumulated organic molecules at the interface layer by adsorption is similar to a concentrated process, combining Fenton-like oxidation after adsorption would significantly enhance the reaction kinetics and possibly develop into a new regeneration approach [5].…”

Section: Introductionmentioning

confidence: 99%

“…One is to realize selective adsorption, which is the prerequisite for recovering valuable substances from wastewater without being disturbed by coexisting matters [3,4]. Another is to obtain adsorbents possessing excellent adsorption performance and the ability to be facilely separated and regenerated, which is significant to lower the operating cost [5,6].…”

Section: Introductionmentioning

confidence: 99%

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RhB Adsorption Performance of Magnetic Adsorbent Fe₃O₄/RGO Composite and Its Regeneration through A Fenton-like Reaction

et al. 2014

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Abstract:Adsorption is one of the most effective technologies in the treatment of colored matter containing wastewater. Graphene related composites display potential to be an effective adsorbent. However, the adsorption mechanism and their regeneration approach are still demanding more efforts. An effective magnetically separable absorbent, Fe3O4 and reduced graphene oxide (RGO) composite has been prepared by an in situ coprecipitation and reduction method. According to the characterizations of TEM, XRD, XPS, Raman spectra and BET analyses, Fe3O4 nanoparticles in sizes of 10-20 nm are well dispersed over the RGO nanosheets, resulting in a highest specific area of 296.2 m 2 /g. The rhodamine B adsorption mechanism on the composites was investigated by the adsorption kinetics and isotherms. The isotherms are fitting better by Langmuir model, and the adsorption kinetic rates depend much on the chemical components of RGO. Compared to active carbon, the composite shows 3.7 times higher adsorption capacity and thirty times faster adsorption rates. Furthermore, with Fe3O4 nanoparticles as the in situ catalysts, the adsorption performance of composites can be restored by carrying out a Fenton-like reaction, which could be a promising regeneration way for the adsorbents in the organic pollutant removal of wastewater. Abbreviation Q e -Equilibrium adsorption capacity of adsorbent, mg/g; C i -The initial aqueous phase concentration of absorbates, mg/L; C e -The equilibrium concentration of absorbates, mg/L; V -The volume of solution, mL; M s -The mass of adsorbent, g; Q max -The maximum adsorption capacity of adsorbent, mg/g; Keywords:

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“…The efficiency of materials such as graphite felt, carbon nanotube, active carbon, stainless steel, platinum, titanium and boron doped diamond were investigated in the electro-Fenton process (19,20). The spectacular magnetic properties in the form of permanent magnetization and Fe content in both divalent and trivalent states (21,22) (17,23,24). The properties of graphene oxide (GO) are easy functionalization, electrical insulator, the large specific surface area and easy dispersion in water and other organic solvents owing to the presence of oxygen functionalities (25).…”

Section: Mxt + Ohmentioning

confidence: 99%

Mitoxantrone removal by electrochemical method: A comparison of homogenous and heterogenous catalytic reactions

Jafarizad

Rostamizadeh

Zarei

et al. 2017

Environ Health Eng Manag

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Background: Mitoxantrone (MXT) is a drug for cancer therapy and a hazardous pharmaceutical to the environment which must be removed from contaminated waste streams. In this work, the removal of MXT by the electro-Fenton process over heterogeneous and homogenous catalysts is reported. Methods: The effects of the operational conditions (reaction medium pH, catalyst concentration and utilized current intensity) were studied. The applied electrodes were carbon cloth (CC) without any processing (homogenous process), graphene oxide (GO) coated carbon cloth (GO/CC) (homogenous process) and Fe3O4@GO nanocomposite coated carbon cloth (Fe3O4@GO/CC) (heterogeneous process). The characteristic properties of the electrodes were determined by atomic force microscopy (AFM), field emission scanning electron microscopy (FE-SEM) and cathode polarization. MXT concentrations were determined by using ultraviolet-visible (UV-Vis) spectrophotometer. Results: In a homogenous reaction, the high concentration of Fe catalyst (>0.2 mM) decreased the MXT degradation rate. The results showed that the Fe3O4@GO/CC electrode included the most contact surface. The optimum operational conditions were pH 3.0 and current intensity of 450 mA which resulted in the highest removal efficiency (96.9%) over Fe3O4@GO/CC electrode in the heterogeneous process compared with the other two electrodes in a homogenous process. The kinetics of the MXT degradation was obtained as a pseudo-first order reaction. Conclusion:The results confirmed the high potential of the developed method to purify contaminated wastewaters by MXT. Keywords: Mitoxantrone, Electrodes, Nanocomposite, Organic chemicals, Carbon Citation: Jafarizad A, Rostamizadeh M, Zarei M, Gharibian S. Mitoxantrone removal by electrochemical method: A comparison of homogenous and heterogenous catalytic reactions.

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Adsorption and heterogeneous Fenton degradation of 17α-methyltestosterone on nano Fe3O4/MWCNTs in aqueous solution

Cited by 399 publications

References 59 publications

Interfacial mechanisms of heterogeneous Fenton reactions catalyzed by iron-based materials: A review

Interfacial mechanisms of heterogeneous Fenton reactions catalyzed by iron-based materials: A review

RhB Adsorption Performance of Magnetic Adsorbent Fe₃O₄/RGO Composite and Its Regeneration through A Fenton-like Reaction

Mitoxantrone removal by electrochemical method: A comparison of homogenous and heterogenous catalytic reactions

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Adsorption and heterogeneous Fenton degradation of 17α-methyltestosterone on nano Fe3O4/MWCNTs in aqueous solution

Cited by 399 publications

References 59 publications

Interfacial mechanisms of heterogeneous Fenton reactions catalyzed by iron-based materials: A review

Interfacial mechanisms of heterogeneous Fenton reactions catalyzed by iron-based materials: A review

RhB Adsorption Performance of Magnetic Adsorbent Fe3O4/RGO Composite and Its Regeneration through A Fenton-like Reaction

Mitoxantrone removal by electrochemical method: A comparison of homogenous and heterogenous catalytic reactions

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RhB Adsorption Performance of Magnetic Adsorbent Fe₃O₄/RGO Composite and Its Regeneration through A Fenton-like Reaction