Rapid recovery of uranium with magnetic-single-molecular amidoxime adsorbent

Zhao, Shilei; Feng, Tiantian; Feng, Lijuan; Yan, Bingjie; Sun, Weiling; Luo, Guangsheng; Wang, Man; Jian, Yaping; Liu, Tao; Yuan, Yihui; Wang, Ning

doi:10.1016/j.seppur.2022.120524

Cited by 42 publications

(4 citation statements)

References 70 publications

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“…In comparison with their cousins, POPs exhibit the merits of easy postfunctionalization and robust chemical and environmental stability, giving them potential for the practical application. 15−17 To promote the absorption performance, various organic groups have been integrated onto the skeleton of the adsorbents, including imidazole, 18 phosphate, 8,19 phenolic hydroxyl, 20 amidoxime groups, 21,22 etc. Among them, amidoxime groups receive tremendous attention due to their excellent binding capacity and selectivity for uranyl ions.…”

Section: ■ Introductionmentioning

confidence: 99%

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Uranium Adsorbents Based on Hypercross-Linked Asphalt Polymers via a Cyanide-Free Strategy

Chen,

Wang,

Lin

et al. 2024

ACS Appl. Polym. Mater.

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The preparation of highly selective and cost-effective uranium adsorbents still remains challenging. Amidoxime-based adsorbents are well known for their targeting effects on uranyl ions. However, the formation of amidoxime groups requires the use of toxic cyanides. In this work, a family of amidoxime-based uranium adsorbents derived from asphalt has been prepared successfully with a cyanide-free strategy. Hypercross-linked asphalt polymers (HAPs) were prepared by using formaldehyde dimethylacetal as the external cross-linker. Then, cyano groups were grafted onto HAPs via the reaction with dichloromethyl methyl ether, followed by the treatment with aqueous ammonia and iodine. Eventually, the cyano groups were converted into amidoxime groups with hydroxylamine to obtain uranium adsorbents (HAP-AOs). The optimum cyanation reaction parameters and HAPs have been screened, and the optimal HAP-AO exhibits a maximum absorption capacity of 485 mg g −1 with high selectivity and excellent recyclability. It should be noted that this preparation procedure of uranium adsorbents can be further extended to other raw materials containing aromatic rings, including coal tar, coumarone-indene resin, and toluene. This work not only provides a cyanide-free strategy for preparing amidoxime-based adsorbents but also sheds light on the value-added utilization of massive byproducts of the petrochemical industry in a sustainable development protocol.

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Section: ■ Introductionmentioning

confidence: 99%

“…To promote the absorption performance, various organic groups have been integrated onto the skeleton of the adsorbents, including imidazole, phosphate, , phenolic hydroxyl, amidoxime groups, , etc . Among them, amidoxime groups receive tremendous attention due to their excellent binding capacity and selectivity for uranyl ions .…”

Section: Introductionmentioning

confidence: 99%

Uranium Adsorbents Based on Hypercross-Linked Asphalt Polymers via a Cyanide-Free Strategy

Chen,

Wang,

Lin

et al. 2024

ACS Appl. Polym. Mater.

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“…In order to extract uranium from water, the commonly used methods are ion exchange, chemical precipitation, coagulation and adsorption [12][13][14][15][16]. However, the first three methods have inevitable defects, for example the ion exchange method is faced with low extraction capacity and a complicated regeneration process; the chemical precipitation method often causes secondary pollution; and the coagulation method is accompanied by poor selectivity [17,18].…”

Section: Introductionmentioning

confidence: 99%

The Efficient and Convenient Extracting Uranium from Water by a Uranyl-Ion Affine Microgel Container

Shen

Xie

et al. 2022

Nanomaterials

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Uranium is an indispensable part of the nuclear industry that benefits us, but its consequent pollution of water bodies also makes a far-reaching impact on human society. The rapid, efficient and convenient extraction of uranium from water is to be a top priority. Thanks to the super hydrophilic and fast adsorption rate of microgel, it has been the ideal adsorbent in water; however, it was too difficult to recover the microgel after adsorption, which limited its practical applications. Here, we developed a uranyl-ion affine and recyclable microgel container that has not only the rapid swelling rate of microgel particles but also allows the detection of the adsorption saturation process by the naked eye.

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“…Because it contains O and N atoms of lone pair electrons, it is very easy to combine with metal ions to form chelates, such as U, Au, Ag, Fe, and so forth. At the same time, it is also an extremely important metal chelating agent, which is widely used in cleaning, materials, chemical industries, and has also been introduced into the pharmaceutical industry for anti-malaria drugs research. − Due to its excellent metal chelation, amidoxime polymer is often used to extract uranium from seawater and subsequently introduced into flotation reagents successively. − In addition, it also has good effects on the photocatalysis of semiconductor materials …”

Section: Introductionmentioning

confidence: 99%

Adsorption Mechanism of Amidoxime Collector on the Flotation of Lepidolite: Experiment and DFT Calculation

Huang

et al. 2022

Langmuir

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Lepidolite is an important mineral resource of lithium. With the increase in awareness of low-carbon and green travel, the demand for lithium has increased dramatically. Therefore, how to increase the output of lithium has to turn into high precedence. In this paper, amidoxime (DPA) was synthesized and used for the efficient collection of lepidolite. Dodecylamine (DA), a commonly used collector of lepidolite ore, was used for comparison. The collecting performances of DA and DPA for lepidolite were studied by the micro-flotation experiment, and the adsorption mechanism of DPA on lepidolite was verified by contact angle, zeta potential tests, FTIR spectra, and density functional theory (DFT) calculations. The results of flotation experiments showed that at the same collector dosage (3 × 10–4 mol/L), the recovery of lepidolite could reach 90%, while the recovery of lepidolite with DA was only 52.5%, and to achieve the maximum recovery of DA (77.5%), only half of the DPA was added. The contact angle test results showed that DPA could effectively improve the hydrophobicity of lepidolite than DA. FTIR spectra and zeta potential tests suggested that DPA molecules were adsorbed on the lepidolite surface by electrostatic attraction. DFT calculations revealed that DPA reacted with the nucleophilic reagent (lepidolite) by the reactive site of the −CH2NH(CH2)2C(NOH)N+H3 group and more easily absorbed on the surface of lepidolite than DA. Therefore, our new finding will provide an important prospect for the sustainable development and utilization of lithium resources.

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Rapid recovery of uranium with magnetic-single-molecular amidoxime adsorbent

Cited by 42 publications

References 70 publications

Uranium Adsorbents Based on Hypercross-Linked Asphalt Polymers via a Cyanide-Free Strategy

Uranium Adsorbents Based on Hypercross-Linked Asphalt Polymers via a Cyanide-Free Strategy

The Efficient and Convenient Extracting Uranium from Water by a Uranyl-Ion Affine Microgel Container

Adsorption Mechanism of Amidoxime Collector on the Flotation of Lepidolite: Experiment and DFT Calculation

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