Magnetic graphene oxide based nano-composites for removal of radionuclides and metals from contaminated solutions

Lujaniené, G.; Šemčuk, Sergej; Lečinskytė, A.; Kulakauskaitė, I.; Mažeika, Kęstutis; Valiulis, D.; Pakštas, Vidas; Skapas, Martynas; Tumėnas, Saulius

doi:10.1016/j.jenvrad.2016.02.014

Cited by 53 publications

(15 citation statements)

References 42 publications

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“…Centrifugation, sedimentation, filtration, and other traditional separation methods deem to be ineffective and time consuming. On the other hand, magnetic GO (mGO) is synthesized via impregnation or co-precipitation methods [23][24][25][26][27] and can be easily separated by the aid of magnetic materials like Fe 3 O 4 or Fe 3 S 4. mGO is synthesized via impregnation or co-precipitation methods [23][24][25][26][27]. In the co-precipitation method, mGO is synthesized via the hydrothermal process by an in-situ reduction/decomposition of a metal precursor such as Fe 3 O 4, FeSO 4 , Fe(NO) 3 , or iron acetate on the surface of dispersed GO under sonication, see Figure 4.…”

Section: Magnetic Nanocomposites and Nanocomposites With Other Metalsmentioning

confidence: 99%

Recent Advances in Applications of Hybrid Graphene Materials for Metals Removal from Wastewater

2020

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The presence of traces of heavy metals in wastewater causes adverse health effects on humans and the ecosystem. Adsorption is a low cost and eco-friendly method for the removal of low concentrations of heavy metals from wastewater streams. Over the past several years, graphene-based materials have been researched as exceptional adsorbents. In this review, the applications of graphene oxide (GO), reduce graphene oxide (rGO), and graphene-based nanocomposites (GNCs) for the removal of various metals are analyzed. Firstly, the common synthesis routes for GO, rGO, and GNCs are discussed. Secondly, the available literature on the adsorption of heavy metals including arsenic, lead, cadmium, nickel, mercury, chromium and copper using graphene-based materials are reviewed and analyzed. The adsorption isotherms, kinetics, capacity, and removal efficiency for each metal on different graphene materials, as well as the effects of the synthesis method and the adsorption process conditions on the recyclability of the graphene materials, are discussed. Finally, future perspectives and trends in the field are also highlighted.

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Section: Magnetic Nanocomposites and Nanocomposites With Other Metalsmentioning

confidence: 99%

Recent Advances in Applications of Hybrid Graphene Materials for Metals Removal from Wastewater

2020

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“…The separation factor, R L , values revealed a favorably sorption process, and the higher values of Freundlich constant, K F , obtained for CGCS_CPLH + , irrespective of the investigated HMI, supported the capacity enhancement by addition of CPLH + onto CGCS cryogel network. Parameter n indicated the strong sorption of Cu 2+ and Fe 3+ ions onto sorbents as it lies in the range 2-4 (Tables S1-S3), indicating chemisorption as the main mechanism of sorption process [24,44]. The values of the mean free energy of sorption, E (kJ mol −1 ), evaluated taking into account the D-R isotherm constant (Equation (10), Supporting Information) of Cu 2+ , Zn 2+ , Ni 2+ , Fe 3+ , and Cr 3+ ions onto CPLH + sorbent (Table S1) were ranging from 12.5 to 15.15 kJ mol −1 , indicating a process which occurs by an ion exchange mechanism.…”

Section: +mentioning

confidence: 99%

A Comparative Study on Cu2+, Zn2+, Ni2+, Fe3+, and Cr3+ Metal Ions Removal from Industrial Wastewaters by Chitosan-Based Composite Cryogels

Humelnicu

Drăgan²,

Ignat

et al. 2020

Molecules

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Materials coming from renewable resources have drawn recently an increased attention in various applications as an eco-friendly alternative in the synthesis of novel functional materials. Polysaccharides, with their prominent representative – chitosan (CS), are well-known for their sorption properties, being able to remove metal ions from dilute solutions either by electrostatic interactions or chelation. In this context, we proposed here a comparative study on Cu2+, Zn2+, Ni2+, Fe3+, and Cr3+ metal ions removal from industrial wastewaters by CS-based composite cryogels using batch technique. The composite cryogels consisting of CS embedding a natural zeolite, namely clinoptilolite, were synthesized by cryogelation, and their sorption performance were compared to those of CS cryogels and of acid-activated zeolite. A deeper analysis of thermodynamics and kinetics sorption data was performed to get insights into the sorption mechanism of all metal ions onto sorbents. Based on the optimized sorption conditions, the removal of the above-mentioned ions from aqueous solutions by the composite sorbent using dynamic technique was also evaluated.

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“…The peak at 553 cm −1 showed Fe-O bond from Fe 3 O 4 . The peak around 1400 cm -1 can be explained by symmetric vibration of COO-groups which indicates the carboxylate groups of GO coordination with the iron cations[21] .The magnetic properties of the Fe 3 O 4 nanoparticles, GO and the M-GO nanocomposite were determined at room temperature. The hysteresis loop of magnetite, GO and M-GO composite are shown in Fig.…”

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confidence: 99%

Preparation and characterization of magnetic graphene oxide nanocomposite (GO-Fe3O4) for removal of strontium and cesium from aqueous solutions

Aytaş

Yusan

Sert

et al. 2018

CMR

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<p>Magnetic graphene oxide nanocomposites (M-GO) were successfully synthesized by partial reduction co-precipitation method and used for removal of Sr(II) and Cs(I) ions from aqueous solutions. The structures and properties of the M-GO was investigated by X-ray diffraction, Fourier transformed infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, scanning electron microscopy, vibrating sample magnetometer (VSM) and N<sub>2</sub>-BET measurements. It is found that M-GO has 2.103 mg/g and 142.070 mg/g adsorption capacities for Sr(II) and Cs(I) ions, respectively. The adsorption isotherm matches well with the Freundlich for Sr(II) and Dubinin–Radushkevich model for Cs(I) and kinetic analysis suggests that the adsorption process is pseudo-second-ordered.</p>

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Magnetic graphene oxide based nano-composites for removal of radionuclides and metals from contaminated solutions

Cited by 53 publications

References 42 publications

Recent Advances in Applications of Hybrid Graphene Materials for Metals Removal from Wastewater

Recent Advances in Applications of Hybrid Graphene Materials for Metals Removal from Wastewater

A Comparative Study on Cu2+, Zn2+, Ni2+, Fe3+, and Cr3+ Metal Ions Removal from Industrial Wastewaters by Chitosan-Based Composite Cryogels

Preparation and characterization of magnetic graphene oxide nanocomposite (GO-Fe3O4) for removal of strontium and cesium from aqueous solutions

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