Magnetic separation of uranium by CoFe2O4 hollow spheres

Wei, Jinbo; Zhang, Xiaofei; Liu, Qi; Li, Zhanshaung; Liu, Lianhe; Wang, Jun

doi:10.1016/j.cej.2013.12.035

Cited by 65 publications

(15 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It was observed that on increasing the pH beyond 4.5, wastewater gets precipitated. FTIR of precipitates (at pH 5.5 and at pH 12.0) was also studied to investigate the characteristics of the precipitate which can be helpful in the investigation of 12 wastewater characteristics. FTIR suggests that some of metallic species like Ni, Cu and Pb get precipitated in their hydroxide form in alkaline pH range (Fig.…”

Section: Characteristics Of Printing Press Wastewatermentioning

confidence: 99%

“…Cobalt ferrite (CoFe 2 O 4 ) is one of the most widely used ferrites because of its high coercivity, chemical stability, mechanical hardness, moderate saturation magnetization and photo-induced magnetic effects [1,[6][7][8][9].Though variety of applications of cobalt ferrite have been investigated, but its application as an adsorbent material for the treatment of metallic pollutants is not yet much explored. Some studies regarding the application of nanosized cobalt ferrite in the treatment of metals and dyes from simulated samples are available, but those regarding its application for industrial effluents are very rare [8,[10][11][12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Potential of cobalt ferrite nanoparticles (CoFe2O4) for remediation of hexavalent chromium from synthetic and printing press wastewater

Srivastava

Kohout

Sillanpää

2016

Journal of Environmental Chemical Engineering

View full text Add to dashboard Cite

Section: Characteristics Of Printing Press Wastewatermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Potential of cobalt ferrite nanoparticles (CoFe2O4) for remediation of hexavalent chromium from synthetic and printing press wastewater

Srivastava

Kohout

Sillanpää

2016

Journal of Environmental Chemical Engineering

View full text Add to dashboard Cite

“…As shown in Figure 3a, the uranium adsorption capacity of PIDO NFs is strongly affected by the pH of solution although all the PIDO NFs show a fast response for uranium uptake in the range of pH 4.0 to 9.0. [45] XPS spectra are recorded to confirm the chemical composition of adsorbents before and after uranium adsorption. The maximum uptake of 1187.05 ± 28.45 mg-U per g-Ads is achieved at pH 7.0 after soaking for 24 h. At the point of pH 8.0, which falls within the pH range of natural seawater, the PIDO NFs show an adsorption capacity of 860.58 ± 13.56 mg-U per g-Ads, suggesting the suitability of this adsorbent for uranium extraction from natural seawater directly.…”

Section: Effect Of Ph On Uranium Adsorptionmentioning

confidence: 99%

Significantly Enhanced Uranium Extraction from Seawater with Mass Produced Fully Amidoximated Nanofiber Adsorbent

Wang

Song

Wen

et al. 2018

Advanced Energy Materials

242

166

View full text Add to dashboard Cite

electricity on a large scale with ultralow greenhouse gases emission. [2] Uranium is the most critical ingredient for the production of nuclear power. In order for nuclear power to be a sustainable energy generation in the future, economically viable sources of uranium beyond terrestrial ores must be developed. [3] The oceans hold ≈4.5 billion tons of uranium, [4] making them a potential huge resource to support nuclear power production for hundreds of years. [5] All that is required is the ability to capture this element from seawater in cost-and energy-efficient ways. In the last decades, researchers worldwide have tried various methods to recover uranium from seawater and aqueous solution, such as coprecipitation, [6] ion-exchange, [7] adsorption via porous organic polymers, [8,9] and organic-inorganic hybrid adsorbents. [10][11][12][13][14][15][16] Among these technologies, the adsorption approach, particularly by using fiber-based adsorbents, is recognized as the most feasible process in terms of practicality, processability, cost, and environmental concerns. [3,17] In the 1990s, Japan Atomic Energy Agency (JAEA) research teams had successfully captured over 1083 g of uranium directly from ocean by using nonwoven fabric adsorbent, firmly establishing the practicality of uranium recovery from the oceans in appreciable quantities. [3,18] Uranium extraction from seawater via fiber adsorption has recentlyThe oceans contain hundreds of times more uranium than terrestrial ores. Fiber-based adsorption is considered to be the most promising method to realize the industrialization of uranium extraction from seawater. In this work, a pre-amidoximation with a blow spinning strategy is developed for mass production of poly(imide dioxime) nanofiber (PIDO NF) adsorbents with many chelating sites, excellent hydrophilicity, 3D porous architecture, and good mechanical properties. The structural evidences from 13 C NMR spectra confirm that the main functional group responsible for the uranyl binding is not "amidoxime" but cyclic "imidedioxime." The uranium adsorption capacity of the PIDO NF adsorbent reaches 951 mg-U per g-Ads in uranium (8 ppm) spiked natural seawater. An average adsorption capacity of 8.7 mg-U per g-Ads is obtained after 56 d of exposure in natural seawater via a flowthrough column system. Moreover, up to 98.5% of the adsorbed uranium can be rapidly eluted out and the adsorbent can be regenerated and reused for over eight cycles of adsorption-desorption. This new blow spun PIDO nanofabric shows great potential as a new generation adsorbent for uranium extraction from seawater.

show abstract

“…Using of nanoparticles (NPs) as adsorbents have been extensively studied because of their unique chemical and physical properties such as high surface area and chemical activity, compared to classical adsorbent materials [16]. Synthesis of nanometer scale mixed oxide particles, such as spinel ferrite, magnetite, titanium-based various binary and ternary mixed oxides have been reported for their remarkable magnetic and conducting properties [17][18][19][20]. The use of iron oxide NPs has found many applications in a variety of fields.…”

Section: Introductionmentioning

confidence: 99%

CeO2–TiFe2O4 nanocomposite for effective removal of uranium ions from aqueous waste solutions

et al. 2019

View full text Add to dashboard Cite

The present work deals with the preparation of Cerium oxide Titanium Ferrite (CTF) nanocomposite using a simple solvothermal method. The synthesized CTF nanocomposites were characterized using FT-IR, XRD, BET surface area, VSM and TEM. The adsorption action of CTF nanocomposite towards U(VI) was optimized using batch experiments by varying solution pH, initial concentration, sorbent dosage and rate of adsorption. The loaded uranium was efficiently desorbed using 0.1 M HNO 3. The Kinetic studies indicated that the adsorption process follows pseudo-second-order equation. Freundlich and Halsey adsorption isotherm was modeled, it proves the multilayers adsorption process. The calculated thermodynamic parameters show that the adsorption process of U(VI) onto CTF nanocomposite was spontaneous and endothermic in nature. The fabricated nanocomposite was applied successfully for removal of uranium species from waste solutions. The obtained results indicated that CTF nanocomposite was a promising and excellent adsorbent for uranium ions removal in comparison with other reported ones. Moreover, the process was very simple, fast and easily reusable several times.

show abstract

Magnetic separation of uranium by CoFe2O4 hollow spheres

Cited by 65 publications

References 29 publications

Potential of cobalt ferrite nanoparticles (CoFe2O4) for remediation of hexavalent chromium from synthetic and printing press wastewater

Potential of cobalt ferrite nanoparticles (CoFe2O4) for remediation of hexavalent chromium from synthetic and printing press wastewater

Significantly Enhanced Uranium Extraction from Seawater with Mass Produced Fully Amidoximated Nanofiber Adsorbent

CeO2–TiFe2O4 nanocomposite for effective removal of uranium ions from aqueous waste solutions

Contact Info

Product

Resources

About