Amidoxime-grafted multiwalled carbon nanotubes by plasma techniques for efficient removal of uranium(VI)

Wang, Yun; Gu, Zhonghua; Yang, Jijun; Liao, Jiali; Yang, Yuanyou; Liu, Ning; Tang, Jun

doi:10.1016/j.apsusc.2014.08.182

Cited by 215 publications

(110 citation statements)

References 45 publications

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“…Wang et al [86] prepared amidoxime-grafted MWCNTs (AO-g-MWCNTs) to adsorb U(VI) from nuclear industrial effluents. Oxidized MWCNTs were first treated by N 2 plasma and then grafted with acrylonitrile (AN) to produce AN-gMWCNTs.…”

Section: Carbon Nanotube-based Nanoadsorbentsmentioning

confidence: 99%

Carbon nanotubes, graphene, and their derivatives for heavy metal removal

Guo

et al. 2017

Adv Compos Hybrid Mater

178

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Carbon nanoadsorbents have attracted tremendous interest for metal ion removal from wastewater due to their extraordinary aspect ratios, surface areas, porosities, and reactivities. However, challenges still exist as they suffer from subpar dispersion and recovery, tending to aggregate, and so on. Thus, significant research efforts focus on modification of these carbon nanomaterials to increase the dispersions and recoveries, while maintaining or even enhancing the desirable properties. This review aims to give an in-depth look at recent and impactful advances in metal ion adsorption applications involving these modified carbon nanostructures. Here, the advanced design and testing of modified carbon nanostructures for metal ion removal are emphasized with comprehensive examples, and various adsorption behaviors and mechanisms are discussed, which are hoped to help the development of more effective adsorbents for water treatment.

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Section: Carbon Nanotube-based Nanoadsorbentsmentioning

confidence: 99%

Carbon nanotubes, graphene, and their derivatives for heavy metal removal

Guo

et al. 2017

Adv Compos Hybrid Mater

178

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“…The MWCNT-g-AO [13] has previously been reported of the uranium sorption capacity of 145 mg•g −1 and a strong selectivity at pH 4.5. The electrospun polyvinyl alcohol/titanium oxide nanofiber adsorbents modified with mercapto groups show larger capacity for thorium than uranyl in aqueous solution [14].…”

Section: Introductionmentioning

confidence: 96%

“…UHM-WPE fiber alone does not have any capability to capture metal ion from aqueous solution, and functional ligands have to be anchored to the surface of UHMWPE fiber. Recently, numerous scientists have focused on sorbents combined with organic functional groups such as amino [9], polyhydroxyethylmethacrylate [10] [11], amidoxime (AO) [7] [12] [13], mercapto [14] etc. The sorbents with binding groups are promising candidates for sorption of actinides.…”

Section: Introductionmentioning

confidence: 99%

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An Amidoximated-UHMEPE Fiber for Selective and High Efficient Removal of Uranyl and Thorium from Acid Aqueous Solution

Jin¹,

Hu²,

Wang³

et al. 2017

ACES

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High efficient removal and recovery of uranium and thorium from nuclear waste solution are essential for environmental preservation and fuel recycle. A new polymer fiber adsorbent (UHMEPE-g-PAO fiber), prepared by amidoximation of grafted polyacrylonitrile onto Ultra High Molecular Weight Polyethylene (UHMWPE) fiber, was used to remove the uranyl and thorium ions from acid aqueous solutions and its performance was carefully investigated. It was found that uranyl ion can penetrate the fiber through the connected pore structures, forming (UO 2 ) (R-C(NH 2 )-NO) 2 chelates with the amidoxime groups within the fiber. Two amidoxime groups (U-N and U-O eq ) and two water molecules (U-O eq2 ) are bound to uranyl ion in the fiber. On the contrary, thorium ions are adsorbed mainly on the fiber surface in the form of Th(OH) 4 precipitate that blocks the entrance of Th 4+ ion into fiber pores. The maximum included other two capacities of uranyl and thorium ions were estimated to be 262.01 mg/g and 160 mg/g at room temperature with pH 3.0, respectively. The results also indicate that the UHMWPE-g-PAO fiber has higher adsorption selectivity for uranyl ion than thorium ion. Uranium and thorium oxide particles were obtained as the ultimate product after sintering of the fiber adsorbent. This novel and environmentally friendly adsorption process is feasible to extract uranium or thorium from acidic aqueous solution.

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“…Recent studies show that nanomaterials, especially carbon-based nanocomposites, exhibit better sorption performance in comparison with non-nanomaterials [3][4][5][6][7][8][9][10][11]. However, the high dispersibility of nanomaterials in aqueous solutions makes it difficult to separate sorbents from aqueous phase after sorption, which restricts the real application in large volumes of waters [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

The removal of uranium(VI) from aqueous solution by graphene oxide–carbon nanotubes hybrid aerogels

Wang

Tang

et al. 2014

J Radioanal Nucl Chem

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Novel graphene oxide-carbon nanotubes (GOCNTs) hybrid aerogels were fabricated via a freeze-drying method using aqueous solutions of GO and CNTs. The resulting aerogels were characterized by scanning electron microscopy, X-ray diffraction, Fourier transformed infrared spectroscopy and thermal gravity analysis. The threedimensional GO-CNTs aerogels were used to remove uranium(VI) from aqueous solutions. The results showed that GO-CNTs aerogels had high removal ability to uranium(VI) and could be a promising sorbent for many environment applications.

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Amidoxime-grafted multiwalled carbon nanotubes by plasma techniques for efficient removal of uranium(VI)

Cited by 215 publications

References 45 publications

Carbon nanotubes, graphene, and their derivatives for heavy metal removal

Carbon nanotubes, graphene, and their derivatives for heavy metal removal

An Amidoximated-UHMEPE Fiber for Selective and High Efficient Removal of Uranyl and Thorium from Acid Aqueous Solution

The removal of uranium(VI) from aqueous solution by graphene oxide–carbon nanotubes hybrid aerogels

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