Advanced oxidation and adsorptive bubble separation of dyes using MnO2-coated Fe3O4 nanocomposite

Kang, Yu-Gyeong; Yoon, Hakwon; Lee, Chung-Seop; Kim, Eunju; Chang, Yoon Seok

doi:10.1016/j.watres.2018.12.038

Cited by 75 publications

(18 citation statements)

References 56 publications

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“…The wide range of their application is based on the possibility of obtaining nanostructured composites with large specific surface area, functional groups, and resistance to degradation [ 6 , 7 ]. Magnetic characteristics such as coercivity and saturation magnetization in turn allow the use of nanoparticles for purification of aqueous media by adsorption of contaminants on its surface and subsequent removal from solution by magnetic separation [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…Among the variety of metal oxide nanocomposites and nanoparticles FeCeO x structures of the type have great potential in photocatalysis, biomedicine, purification of aqueous media, etc. [ 7 , 8 , 9 , 10 , 11 , 12 ]. Methods for preparing FeCeO x nanostructures are quite numerous, and in most of them multiphase amorphous-like structures are obtained, which makes their own adjustments for their application [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Efficiency of Detection and Capture of Manganese in Aqueous Solutions of FeCeOx Nanocomposites Doped with Nb2O5

Kozlovskiy

Egizbek

Здоровец

et al. 2020

Sensors

293

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: The main purpose of this work is to study the effectiveness of using FeCeOx nanocomposites doped with Nb2O5 for the purification of aqueous solutions from manganese. X-ray diffraction, energy–dispersive analysis, scanning electron microscopy, vibrational magnetic spectroscopy, and mössbauer spectroscopy were used as research methods. It is shown that an increase in the dopant concentration leads to the transformation of the shape of nanoparticles from spherical to cubic and rhombic, followed by an increase in the size of the nanoparticles. The spherical shape of the nanoparticles is characteristic of a structure consisting of a mixture of two phases of hematite (Fe2O3) and cerium oxide CeO2. The cubic shape of nanoparticles is typical for spinel-type FeNbO4 structures, the phase contribution of which increases with increasing dopant concentration. It is shown that doping leads not only to a decrease in the concentration of manganese in model solutions, but also to an increase in the efficiency of adsorption from 11% to 75%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of the Efficiency of Detection and Capture of Manganese in Aqueous Solutions of FeCeOx Nanocomposites Doped with Nb2O5

Kozlovskiy

Egizbek

Здоровец

et al. 2020

Sensors

293

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“…Kang, Yoon, Lee, Kim, and Chang (2019) used MnO 2coated Fe 3 O 4 nanocomposite (Fe 3 O 4 @MnO 2 ) as catalyst to treat dyes via AOPs and adsorptive bubble separation (ABS).…”

Section: Advanced Oxidation Processes (Aops)mentioning

confidence: 99%

“…Kang, Yoon, Lee, Kim, and Chang (2019) used MnO 2 ‐coated Fe 3 O 4 nanocomposite (Fe 3 O 4 @MnO 2 ) as catalyst to treat dyes via AOPs and adsorptive bubble separation (ABS). Results indicated that H 2 O 2 could reduce the MnO 2 shell of catalyst to Mn 2 O 3 , leading to radicals and O 2 gas to remove dyes.…”

Section: Chemical Processesmentioning

confidence: 99%

Physico‐chemical processes

Yu¹,

Yao²,

Pan³

et al. 2020

Water Environment Research

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By summarizing 187 relevant research articles published in 2019, the review is focused on the research progress of physicochemical processes for wastewater treatment. This review divides into two sections, physical processes and chemical processes. The physical processes section includes three subsections , that is, adsorption, granular filtration, and dissolved air flotation, whereas the chemical processes section has five subsections , that is, coagulation/flocculation, advanced oxidation processes, electrochemical, capacitive deionization, and ion exchange.

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“…Recently, worldwide attention has been brought to the fact that dyes, the toxic effects of which threaten the lives of humans, animals and the environment, are directly discharged into the environment [4]. Various methods have been designed to treat dye wastewater, such as adsorption [5][6][7][8][9][10], oxidation [11][12], membrane separation [13][14], electrochemical techniques [15][16] and ion exchange [17]. However, none of these methods have been successful in completely removing dyes from wastewater and all have limitations including high cost, secondary pollutant generation and poor removal efficiency.…”

Section: Introductionmentioning

confidence: 99%

Isotherm, kinetic and thermodynamic studies of methylene blue adsorption using Leucaena leucocephala

Kul

Aldemır

2021

Environmental Research and Technology

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In recent years, great focused has been placed on the development of low-cost adsorbents to be used for applications regarding treatment of wastewater. In this study, Leucaena leucocephala peel (LLP) was used for adsorption of methylene blue from aqueous solutions. The experiments were conducted at seven concentrations (15, 30, 45, 60, 75, 90, 105 mg L-1) and three temperatures (298, 308, 318 K). The obtained data were applied to adsorption isotherm, kinetic and thermodynamic calculations. The results showed that Freundlich isotherm was more appropriate compared to Langmuir and Temkin isotherms. The kinetic results indicated that the process fitted pseudo second order model with higher R 2 values compared to pseudo first order and intra-particle diffusion models. Gibbs free energy, enthalpy and entropy values were calculated for 298 K as 2.776 kJ mol-1 , 6.262 kJ mol-1 and 11.699 J mol-1 , respectively.

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Advanced oxidation and adsorptive bubble separation of dyes using MnO2-coated Fe3O4 nanocomposite

Cited by 75 publications

References 56 publications

Evaluation of the Efficiency of Detection and Capture of Manganese in Aqueous Solutions of FeCeOx Nanocomposites Doped with Nb2O5

Evaluation of the Efficiency of Detection and Capture of Manganese in Aqueous Solutions of FeCeOx Nanocomposites Doped with Nb2O5

Physico‐chemical processes

Isotherm, kinetic and thermodynamic studies of methylene blue adsorption using Leucaena leucocephala

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