Synthesis and Th(IV) sorption characteristics of functionalised graphene oxide

Li, Yan; Wang, Chun Li; Liu, Chun Li

doi:10.1007/s10967-014-3196-9

Cited by 7 publications

(3 citation statements)

References 28 publications

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“…In general, membranes have proved to be efficient and selective in acidic conditions at a pH of 4 to 5.5 for recovery of uranium and lower than 4 to recover thorium. However, to increase the recovery of radioactive elements, it is required to functionalize the membrane using an additive with a higher selectivity towards target elements [114][115][116][117][118][119]. Membrane functionalization is done by polymer adsorption at the membrane surface.…”

Section: Separation By Membranesmentioning

confidence: 99%

Separation of Radioactive Elements from Rare Earth Element-Bearing Minerals

García

Latifi

Amini

et al. 2020

Metals

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Rare earth elements (REE), originally found in various low-grade deposits in the form of different minerals, are associated with gangues that have similar physicochemical properties. However, the production of REE is attractive due to their numerous applications in advanced materials and new technologies. The presence of the radioactive elements, thorium and uranium, in the REE deposits, is a production challenge. Their separation is crucial to gaining a product with minimum radioactivity in the downstream processes, and to mitigate the environmental and safety issues. In the present study, different techniques for separation of the radioactive elements from REE are reviewed, including leaching, precipitation, solvent extraction, and ion chromatography. In addition, the waste management of the separated radioactive elements is discussed with a particular conclusion that such a waste stream can be employed as a valuable co-product.

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Section: Separation By Membranesmentioning

confidence: 99%

Separation of Radioactive Elements from Rare Earth Element-Bearing Minerals

García

Latifi

Amini

et al. 2020

Metals

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“…[6] Graphene oxide (GO) is a two dimensional nano material with multiple oxygen containing functional groups such as carbonyl and carboxyl presumably at the plane edges, hydroxyl and epoxides in the basal plane capable of binding radionuclides by coordination and electrostatic interaction; hence responsible to be the primary chemical factor for enhancing the sorption properties. [7][8] Unlike carbon nanotubes (CNTs), graphene oxide poses an inherent advantage of high degree of functionalization and declining the tendency to aggregate via π-π interactions. [9] Solid phase extraction by adsorption is proven to be an effective and convenient method for separation/pre-concentration of radionuclides from aqueous solution as compared to ion exchange, precipitation and liquid-liquid extraction because of its easy implementation with several detection methods, cost effectiveness, reusability, reproducibility, high enrichment factor with rapid separation and high recovery with the target species.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, GO has been proven to be nontoxic and biodegradable [6] . Graphene oxide (GO) is a two dimensional nano material with multiple oxygen containing functional groups such as carbonyl and carboxyl presumably at the plane edges, hydroxyl and epoxides in the basal plane capable of binding radionuclides by coordination and electrostatic interaction; hence responsible to be the primary chemical factor for enhancing the sorption properties [7–8] . Unlike carbon nanotubes (CNTs), graphene oxide poses an inherent advantage of high degree of functionalization and declining the tendency to aggregate via π‐π interactions [9] …”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide as an Adsorbent for Ruthenium from Aqueous Solution

Mohanty

Yuvaraj²,

Jena

et al. 2022

ChemistrySelect

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Graphene oxide (GO) was synthesized by modified Hummers method and its adsorption behavior towards ruthenium (III) from aqueous solution was studied w.r.t contact time, pH, ruthenium (III) concentration, GO dosage, temperature and ionic strength. The synthesized GO and ruthenium(III) adsorbed graphene oxide (Ru‐GO) were characterized by various techniques such as Fourier Transform Infrared Spectroscopy (FTIR), Raman Spectroscopy, X‐Ray Diffraction (XRD), X‐ray Photoelectron Spectroscopy (XPS) and Scanning Electron Microscopy‐Energy Dispersive X‐ray Spectroscopy (SEM‐EDS). Pseudo second order kinetics and Langmuir isotherm model were best fitted in terms of standard deviation and regression coefficient. Adsorption of ruthenium (III) was pH dependent and maximum removal occurred at pH=2 with Kd=2.468×103 mL. g−1. Thermodynamic parameters such as enthalpy (ΔH°), entropy (ΔS°), Gibbs energy (ΔG°), activation energy (Ea) and sticking probability (SP*) were also calculated.Moreover, complete desorption of ruthenium (III) on GO could be achieved at an acidity of 8 M HNO3.

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Effect of pH, ionic strength, humic substances and temperature on the sorption of Th(IV) onto NKF-6 zeolite

Wang

Chen

et al. 2016

J Radioanal Nucl Chem

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Synthesis and Th(IV) sorption characteristics of functionalised graphene oxide

Cited by 7 publications

References 28 publications

Separation of Radioactive Elements from Rare Earth Element-Bearing Minerals

Separation of Radioactive Elements from Rare Earth Element-Bearing Minerals

Graphene Oxide as an Adsorbent for Ruthenium from Aqueous Solution

Effect of pH, ionic strength, humic substances and temperature on the sorption of Th(IV) onto NKF-6 zeolite

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