Magnetic Fe2MO4 (M:Fe, Mn) activated carbons: Fabrication, characterization and heterogeneous Fenton oxidation of methyl orange

Nguyen, T. D.; Phan, Ngoc Hoa; Huy, Manh; Ngo, Kim Tham

doi:10.1016/j.jhazmat.2010.09.068

Cited by 305 publications

(98 citation statements)

References 59 publications

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“…The magnetization reaches zero when the magnetic field is removed because the iron oxide particles are of single-crystal domain with one orientation of the magnetic moment. The saturation magnetization values, found to be rs = 0.1 emu g −1 and rs = 0.35 emu g −1 for NF and NFM impregnated carbons, respectively, are less than those for Fe 3 O 4 nanoparticles (Ms = 58.94 emu g −1 ) [38], and bare Fe 2 MnO 4 nanoparticles (Ms = 70 emu g −1 ) [39]. This decrease can be attributed to the existence of graphitic layers on the surface of magnetic nanoparticles [35].…”

Section: Materials Characterizationmentioning

confidence: 79%

“…The position and relative intensity of diffraction peaks presented in Figure 4 can be indexed to the standard data for Fe 2 MO 4 bulk magnetite (JCPDS file No. 10-0319) [38]. There was not detected peak for manganese oxide implying incorporation of manganese ions into the crystal structure of Fe 3 O 4 [39] leading to the formation of Fe 2 MO 4 (M:Fe and/or Mn).…”

Section: Materials Characterizationmentioning

confidence: 95%

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Adsorption of Arsenate by Nano Scaled Activated Carbon Modified by Iron and Manganese Oxides

et al. 2017

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Abstract:The presence of arsenic in water supplies is a major problem for public health and still concerns large parts of population in Southeast Asia, Latin America and Europe. Removal of arsenic is usually accomplished either by coagulation with iron salts or by adsorption with iron oxides or activated alumina. However, these materials, although very efficient for arsenic, normally do not remove other undesirable constituents from waters, such as chlorine and organo-chlorine compounds, which are the results of water chlorination. Activated carbon has this affinity for organic compounds, but does not remove arsenic efficiently. Therefore, in the present study, iron modified activated carbons are investigated as alternative sorbents for the removal of arsenic(V) from aqueous solutions. In addition, modified activated carbons with magnetic properties can easily be separated from the solutions. In the present study, a simple and efficient method was used for the preparation of magnetic Fe 3 (Mn 2+ )O 4 (M:Fe and/or Mn) activated carbons. Activated carbons were impregnated with magnetic precursor solutions and then calcinated at 400 • C. The obtained carbons were characterized by X-ray diffraction (XRD), nitrogen adsorption isotherms, scanning electron microscopy (SEM), vibrating sample magnetometer (VSM), Fourier Transform Infrared Spectrometry (FTIR) and X-ray photoelectron spectroscopy (XPS) measurements. Their adsorption performance for As(V) was evaluated. The iron impregnation presented an increase in As(V) maximum adsorption capacity (Q max ) from about 4 mg g −1 for the raw carbon to 11.05 mg g −1 , while Mn incorporation further increased the adsorption capacity at 19.35 mg g −1 .

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Section: Materials Characterizationmentioning

confidence: 79%

Section: Materials Characterizationmentioning

confidence: 95%

Adsorption of Arsenate by Nano Scaled Activated Carbon Modified by Iron and Manganese Oxides

et al. 2017

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“…Throughout the reaction, Solutions of dye were prepared by using ultrapure water (MILLIPORE, direct-Q, UV3 With Pump) and the reactant solution was adjusted to constant pH with dilute aqueous HCl 0.01M or NaOH 0.01M solutions. the taking away were carried out by filtered using a syringe filter of diameter 0,45μm (Minisart, sartorium stedim biotech).The degradation progress was monitored by spectrometric measurements using a spectrophotometer (Jasco V530) with its adsorption at 465nm for samples that had pH> 3 and at 500nm for samples that had pH≤3 [15].The effects of various experimental parameters such as the temperature, catalyst dosage, and H 2 O 2 amount were investigated. The average degradation in terms of the percentage of MO in solution was calculated using the following formula:…”

Section: Ii-5 Experimental Procedures and Analytical Methodsmentioning

confidence: 99%

Preparation and Characterisation A Catalytic System Cu-Clay for Catalytic Oxidation of Methyl Orange with H2O2

Idrissi¹,

Miyah²,

Lahrichi³

et al. 2014

IJIRSET

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ABSTRACT:In this work, the decolorization of Methyl Orange was conducted using catalysts prepared by impregnation of copper on natural clay in the presence of H 2 O 2 . The catalysts Cu-clay, prepared from the concentrated metal precursor of (impregnation ratio, W(Cu(NO 3 ) 2 )/W(clay) = 1,5%-7,5%) were characterized by several methods such as X-ray diffraction (XRD), electronic scan microscopy (SEM), x-ray fluorescence (FX), and Brunauer-EmmettTeller (BET). Important factors affecting catalyst activity and methyl orange removal efficiencies were studied: the effects of temperature, oxidant concentration, and catalyst dosage. The results showed, a very significant activation of hydrogen peroxide by the catalyst, the Methyl Orange depletion percentage reaching 94 % after 2 h, and very stability of the catalyst. It was also observed that the best catalyst, at a reaction temperature of 25°C. 2,5ml of H 2 O 2 and 4.0 g/L of 5% Cu-clay, 94% decolorization was achieved within 120 min treatment. Although the Cu show high activity, their stability and reusability still need improvement.

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“…Treatment with HNO 3 (Ultrex Baker) for GAC was important [22], as it was intended to insert oxygen to structural surface of the coals, following the ideas of Nguyen [23] and Shi [24], who studied that oxygen complexes can be formed on surface of activated carbon by modifying its surface chemistry. GAC's were contacted with concentrated HNO 3 in a proportion of 100 g of carbon and 300 ml of acid; it was stirred for 8 h as in HCl case.…”

Section: The Gac Pre-treatment With Hno3mentioning

confidence: 99%

Leachate Treatment by Heterogeneous Fenton on an Activated Carbon Substrate with Fe(II) Impregnated

May-Marrufo¹,

Méndez-Novelo²,

Quintal³

et al. 2017

JEP

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Organic components contained in leachates resulting from decomposition of waste are difficult to degrade. They also contain inorganic components, as nitrogen compounds, phosphates, and chlorides, also Ca, Mg, K, and heavy metals. Leachate volume and its composition vary depending on biogeochemistry of type site of deposited residues, and age of sanitary landfill. In this study, it conducted a Heterogeneous Fenton, advanced oxidation process using lignitic activated carbon as solid matrix, with and without Fe 2+ impregna-

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Magnetic Fe2MO4 (M:Fe, Mn) activated carbons: Fabrication, characterization and heterogeneous Fenton oxidation of methyl orange

Cited by 305 publications

References 59 publications

Adsorption of Arsenate by Nano Scaled Activated Carbon Modified by Iron and Manganese Oxides

Adsorption of Arsenate by Nano Scaled Activated Carbon Modified by Iron and Manganese Oxides

Preparation and Characterisation A Catalytic System Cu-Clay for Catalytic Oxidation of Methyl Orange with H2O2

Leachate Treatment by Heterogeneous Fenton on an Activated Carbon Substrate with Fe(II) Impregnated

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