SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Junhan Luo,Qi Qing,Shuang Liu,Bo Liang,Jingyu Wang,Zhe Wang,Jing Chen,Yuexiang Lu
The efficient extraction and recovery of uranium from spent fuel is crucial for the sustainable development of nuclear energy. Pyrochemical reprocessing based on chloride molten salt electrolysis shows promise in addressing this challenge but still has several key issues remain unresolved. The non-contact microplasma gas electrode may be an ideal anode in this system, which can solve the problem of anode corrosion. Herein, we propose combining microplasma anodes with molten salt electrochemistry to explore the feasibility of separating U 4+ and UO 2 2+ from chloride molten salts and to investigate the effects of electrochemical parameters on the separation of U 4+ and UO 2 2+ . Experimental results demonstrate that microplasma anodes exhibit excellent performance in separating U 4+ and UO 2 2+ from molten salts to form Al-U intermetallic and UO 2 solids, respectively. The composition of the products and the deposition rate of the uranium were significantly influenced by electrolysis temperature and current, whereas the initial concentration of reactants had a minimal overall impact on the experiments. Under conditions of prolonged electrolysis, the microplasma anode achieves high separation efficiencies for both U 4+ and UO 2 2+ (>96 %).
研究领域:
核能工程
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Zhengxing Jiang,Hua Li,Rui Ai,Yuequan Deng,Yi He
Artificial enzyme mimics are more stable and cost-effective than bioenzymes, but they usually lack substrate recognition function. Here, we report that uranyl (UO22+) features efficient artificial peroxidase activity with a high specificity and can catalyze the oxidation of 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium (ABTS) by H2O2 to yield green ABTS radical (ABTS•+), whereas other common substrates such as 3,3′-diaminobenzidine (DAB), 3,3′,5,5′-tetramethylbenzidine (TMB), o-phenylenediamine (OPD), and dopamine (DA) are not oxidized. The high specificity of UO22+ peroxidase mimic is ascribed to the electrostatic-driven coordination interaction between ABTS anion and UO22+ cation, and the orthorhombic metastudtite from the reaction between H2O2 and UO22+ rather than reactive radicals is identified as the key intermediate, which accounts for ABTS oxidation. On the basis of the UO22+ peroxidase mimic, a facile, low-cost, and reliable colorimetric assay is fabricated. The resulting colorimetric assay displays a good analytical performance for UO22+ detection in a linear range of 10–100 μM, along with a limit of detection of 0.5 μM. Further, the present colorimetric assay has a good selectivity toward UO22+ over common metal ions, which is applied for determination of UO22+ in natural water samples with satisfactory recovery results.
研究领域:
分析化学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2025
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IF 6
Huan Yang,Danyan Lin,Jie Yang,Jiahuang Qiu,Juxiao Li,Tianxin Li,Yubo Wei,Wen Yao,Xinrong Guo
Background Uranium is a vital element in energy and military applications but poses significant environmental and health risks due to its toxicity, radioactivity, and long half-life. During its use, uranium waste is released into the environment, often in the form of uranyl ions (UO 2 2+ )—the most stable and water-soluble uranium species. These ions can contaminate water sources, threatening both ecosystem safety and human health. Thus, developing rapid and sensitive methods for detecting UO 2 2+ in aquatic environments is crucial for ensuring water security and public health. Results In this study, water-phase tellurium-doped silver sulfide quantum dots (AgTe 0 . 08 S 1.67 QDs) were synthesized using a simple and rapid one-pot method. It exhibits monodisperse spherical morphology, with a uniform average particle size of 1.92 nm. Additionally, Te doping significantly improved the fluorescence performance of this material. UO 2 2+ can quickly quench the fluorescence of AgTe 0 . 08 S 1.67 QDs, with a quench time as low as 1 min. The quenching mechanism is primarily attributed to the synergistic effects of electrostatic interaction and electron transfer. Meanwhile, Te doping provided binding sites and increased the electron transfer efficiency from the O and N atoms of AgTe 0 . 08 S 1.67 QDs to the UO 2 2+ . Using this QDs as a fluorescent probe to detect UO 2 2+ , the detection limit was 3.65 nM, which is better than most fluorescent probes reported in the literature. Significance A new fluorescence sensor based on AgTe 0 . 08 S 1.67 QDs was successfully developed and used to rapidly detect UO 2 2+ with high sensitivity. This method was also successfully applied to detect UO 2 2+ in lake water, river water and seawater, offering a new approach for the rapid detection of uranium pollutants in environmental water.
研究领域:
环境科学
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分析化学
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纳米技术
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荧光光谱学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2019
·Vol. 321
·期 3
·977-984
·
IF 1.186
Wu Xiandong,Li Kaiwen,Ying Sujunheng,Liu Li,Wang Meng,Liao Yun
In this paper, three-dimensional graphene (3DG) electrode material was prepared by hydrothermal reduction using graphene oxide as precursor. Its morphology and structure were characterized by SEM, BET, XRD, Raman, FTIR and TG, and its electrochemical performance was also measured. The results showed that 3DG possessed hierarchical pore structure, large specific surface area, high specific capacitance and low impedance. Using 3DG as electrode material for electrosorption of UO 2 2+ , it showed that the saturated adsorption capacity can reach up to 113.80 mg g −1 and the adsorption rate is 0.32 mg g −1 min −1 at a given optimal applied voltage of 1.8 V.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Liwen Tang,Shaobo Ren,Tingting Zhang,Xin Wei,Mengting Li,Xueqiong Yin,Suying Wei
A sodium alginate (ALG)-based UO 2 2+ -imprinted thermoresponsive hydrogel (SUIT) was prepared, with NIPAM as the starting monomer. On this basis, another hydrogel (SPUIT) was prepared with ɛ -polylysine ( ɛ -PL) as a co-matrix to improve UO 2 2+ adsorption capacity and stability of the hydrogel. The SUIT and SPUIT were characterized with FTIR, DSC, SEM, TGA, XPS, and Raman spectroscopy. The maximum adsorption capacity of SUIT and SPUIT to UO 2 2+ was 137.43 mg/g and 205.99 mg/g, respectively. After simply washing the adsorbents with cold water, the desorption efficiency of SUIT and SPUIT reached 96.46% and 97.21%, respectively. The desorption efficiency of SUIT and SPUIT slightly decreased to 82.42% and 84.99% after 10 cycles of adsorption–desorption procedure. In the presence of other metal ions (Pb 2+ , Cu 2+ , Mg 2+ , Ca 2+ , UO 2 2+ , Cd 2+ , Na + , K + ), the selectivity coefficients of SUIT and SPUIT for UO 2 2+ /M n+ were in the range of 9.1–15.8 and 7.4–13.3. When tested with a 20 L real sea water, the adsorption capacity reached 58.24 µg/g for SUIT and 59.69 µg/g for SPUIT, demonstrating a high potential in accumulation of uranium. Moreover, the introduction of ɛ -PL enhanced the antibacterial activity and resistance to degradation of the hydrogel.
研究领域:
材料科学
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环境科学
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核能工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2015
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IF 4.097
Xiao-Hong Cao,Hao-Yan Zhang,Ru-Chao Ma,Qian Yang,Zhi-Bin Zhang,Yun-Hai Liu
A simple and selective colorimetric sensor based on o-phosphorylethanolamine-functionalized gold nanoparticles (OPA–Au NPs) as an optical probe has been developed for the detection of UO 2 2+ . OPA–Au NPs rapidly aggregate in the presence of UO 2 2+ , thereby causing a visual color change from red to blue, which is easily detectable by eye. The proposed sensing system possesses a selective response for UO 2 2+ over other heavy metal ions. The current method shows application potential for UO 2 2+ detection in real water samples.
研究领域:
分析化学
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环境科学
✓ 已验证
DOI
高影响因子
Applied Sciences-Basel
·
2021
·Vol. 11
·期 20
·9684
·
IF 2.679
Wei Luo,Huiting Lin,Zhihao Wu,Jingteng Chen,Ruiyang Chi,Xiaoxia Ye,Jie Chen
Plant tannins have the ability to form stable complexes with metal ions, while microporous membranes have low pressure drop and high flux characteristics. Combining these two materials, a new type of tannin-immobilized membrane (M-TAN) adsorption material has been developed. The PA-BWT, PVDF-BWT, CELL -BWT, and PA-AA-BWT were prepared using different types of microporous membranes as substrates, which maintained the porous structure of the membranes and had the characteristics of high flux and fast filtration rate. The surface contact angle and pure water flux analysis showed that the introduction of tannin with multi-phenolic hydroxyl groups increased the hydrophilicity and water flux of the M-TANs. The adsorption performance shows that the adsorption capacity of four kinds of M-TANs for UO22+is in the order of PA-BWT > PA-AA-BWT > PVDF-BWT > CELL-BWT, and PA-BWT has the largest adsorption capacity of 0.398 mmol g−1. In addition, the adsorption isothermal and kinetic data of PA-BWT were well fitted by the Langmuir equation and the Elovich model, respectively. The negative values of ΔG for UO22+adsorption on PA-BWT indicated that adsorption is a spontaneous and favorable process. These facts indicate that PA-BWT can be used as a low-cost adsorbent for effective removal of UO22+from aqueous solutions.Keywords:plant tannins;microporous membranes;immobilized tannins;membrane adsorption
研究领域:
环境科学
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Jiayi Chen,Wei Han,Yixuan Cai,Xudong Wang,Rugeng Liu,Meng Zhang,Mei Li,Weiqun Shi
Studied the electrochemical behavior of Ce(III) ions on Bi film electrodes and liquid Bi electrode. • Studied the effect of Ce (III) ions on the electrochemical behavior of UO 2 2+ at Bi film electrode and liquid Bi electrode. • Ce(III) ions and UO 2 2+ ions were separated via potentiostatic and galvanostatic electro-deposition on a liquid Bi electrode. • Found that better separation of Ce(III) ions and UO 2 2+ can be achieved at relatively low potentials. • The extraction efficiency and separation efficiency were calculated for electrolytic separation at lower potentials. To achieve the separation of uranium and fission products, a liquid Bi electrode was employed to study the electrochemical separation of the fission product Ce(III) ions and UO 2 2+ ions. The electrochemical reduction mechanism of Ce(III) ions was investigated at a Bi film electrode using three electrochemical testing methods: CV, SWV and CP, The results showed that a series of reduction peaks related to the formation of Ce-Bi intermetallic compounds appeared at potentials more positive than the reduction potential of Ce(III) ions. Meanwhile, the electro-reduction mechanism of Ce(III) ions at a liquid Bi electrode was also explored. A reduction peak associated with the formation of Bi-Ce solid solution was recorded. The impacts of Ce(III) ions on the electro-reduction mechanism of UO 2 2+ at a Bi film electrode were examined, and found that the electro-reduction of UO 2 2+ was two-step single-electron transfer process before and after the addition of Ce(III) ions. Furthermore, electrochemical separation of UO 2 2+ and Ce(III) ions was performed at a liquid Bi electrode at -0.7 V/-1.3 mA cm -2 . XRD results confirmed that the separation product included not only UO 2 , but also Ce 2 O 3 and Bi-Ce alloy. Nevertheless, constant potential electrolysis experiment was conducted at the potential of -0.3 V, and the product analyzed by XRD, SEM and EDS demonstrated that only spherical UO 2 with a regular morphology was obtained. The separation factor between UO 2 2+ and Ce(III) ions and extraction efficiency of UO 2 were calculated to be 34.4 and 97.76 %, respectively. Download: Download high-res image (184KB) Download: Download full-size image
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Jiaxin Yang,Yang Qiu,Junyuan Liang,Yanhui Wang,Jun Zhou,Zhaoyang Wu
To address the urgent need for on-site and rapid detection of uranyl ions (UO 2 2+ ), we developed a visual sensing platform based on the structural color of a lamellar photonic crystal. A periodic lamellar structure was fabricated via surfactant-directed self-assembly of dodecyl glyceryl itaconate (DGI) and subsequently immobilized in a polyacrylamide (PAAm) network, yielding an anisotropic, amidoxime-functionalized h-PAO-PDGI/PAAm hydrogel. The hydrogel exhibited an equilibrium swelling ratio of 2296% and excellent mechanical properties, with a tensile strength of 0.014 MPa and elongation at break of 281.21%. It contains abundant amidoxime, carboxyl, and amide groups that serve as specific binding sites for UO 2 2+ coordination. Binding of UO 2 2+ induces hydrogel shrinkage, decreasing the interlayer spacing and causing a blueshift of the diffraction peak. This blueshift shifts the structural color from red to blue within 25 min. The sensor exhibits a linear response to UO 2 2+ in the 0.01–100 μM range, with a detection limit of 9.7 nM. Featuring instrument-free operation, visual readout, and good reusability, this sensor provides a promising approach for on-site monitoring and pollution control of UO 2 2+ in environmental waters.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Ming Zhang,Yan Zhang,Xuede Li,Jie Li,Yufeng Liu
The efficient simultaneous extraction of radioactive metal cations and anions from radioactive waste is crucial for the proper disposal of spent fuel and environmental protection. Modifying metal-organic frameworks (MOFs) into multifunctional materials with tailored properties offers a promising strategy to enhance their practical applications. In this study, polyaniline (PANI)-modified MOF nanosheets (NM53P) are synthesized through a simple, low-cost method and employed to uptake uranium (UO 2 2+ ) and rhenium (ReO 4 - ) from aqueous solutions. The adsorption performance of NM53P-3 composites is evaluated by studying the effects of solution pH, contact time, initial UO 2 2+ /ReO 4 - concentrations, ionic strength, and interfering ions. The maximum adsorption amounts for UO 2 2+ and ReO 4 - are 293.91 and 526.32 mg/g, which surpass most reported adsorbents. Adsorption of UO 2 2+ /ReO 4 - is pH-dependent, spontaneous, and endothermic, and best fit the pseudo-second-order (PSO) kinetic model and Freundlich isotherm. Batch experiments and X-ray photoelectron spectroscopy (XPS) analysis confirm that adsorption is primarily influenced by the abundant amine functionalities and unsaturated metal sites in the NM53P-3 adsorbents. Furthermore, NM53P-3 demonstrates excellent recycling performance. This study highlights the potential of NM53P-3 composites for effectively extracting various radionuclides from aqueous solutions, paving the way for the development of new multifunctional materials for wastewater treatment.
研究领域:
环境科学
·
核化学与放射化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xubing Yang,Wei Liu,Pengfei Han,Yin You,Ju Lv,Xinyue Zhang,Ziyu Qin,Xueqiong Yin
Uranium recovery from wastewater or seawater is important for both pollution control and uranium supply. Due to the complexity of the water body, it requires that the adsorbent should not only be highly efficient for selective adsorption but also have good antimicrobial properties. In this study, an antimicrobial thermosensitive hydrogel (UITAC) for uranium adsorption was prepared by one-step ion-imprinted polymerization using chitosan as a substrate and allyl trimethylammonium chloride as the antimicrobial modifier. UITAC showed excellent antibacterial rate against Escherichia coli and Staphylococcus aureus , being 98.8 % and 89.1 %, respectively. Endothermic and exothermic peaks respectively showed up at 36.3–38.5 °C and 30.5–34.1 °C in the DSC curves. UITAC quickly achieved its adsorption equilibrium in 30.0 min at 50 °C, pH 5.0 in the 0.8 mg/mL UO 2 2+ solution, with an adsorption capacity of 81.2 mg/g. The adsorption capacity could remain at 80 % after 5 cycles of repeated use. UITAC showed better adsorption selectivity to UO 2 2+ than vanadium and other metal ions, with selectivity coefficients α(UO 2 2+ /M n+ ) being 1.4–10.3. The pseudo-second-order kinetics and Langmuir adsorption model had a better fit for UO 2 2+ adsorption by UITAC. The adsorption was a spontaneous process. The Gibbs Free Energy change, enthalpy change, and entropy change at 323.2 K were − 16.0 kJ/mol, 64.3 kJ/mol, and 248.4 J/mol·K, respectively. UITAC showed high potential in practical application environment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yu Liu,Qiuhui Deng,Yao Yu,Hong Chen,Chunlin Liu,Le Li,Qingyun Cai,Deshuai Zhen
Efficient enrichment and recycling of uranyl ion (UO 2 2+ ) from wastewater are crucial for preventing radioactive contamination and protecting human health. Herein, two novel covalent organic frameworks (Tp-PDAN and Tp-PDAN-AO) were synthesized by a simple two-step method. Tp-PDAN-AO exhibits excellent hydrophilicity, thermal stability, and chemical stability, making it suitable for UO 2 2+ removal from acidic wastewater. The high-density amidoxime chelate groups in Tp-PDAN-AO confer high adsorption capacity and selectivity for UO 2 2+ , with a maximum adsorption capacity of 565.30 mg g −1 , reaching equilibrium within 2 h. Additionally, Tp-PDAN-AO exhibits strong photocatalytic activity under UV irradiation, which further enhances U(VI) reduction, boosting both adsorption kinetics and capacity. The maximum adsorption capacity increases to 757.62 mg g −1 with photocatalytic reduction. Density functional theory (DFT) calculations reveal six distinct COF-U(VI) interaction modes, explaining the chelation mechanism between hydrated uranyl ions and Tp-PDAN-AO (ƞ 2 mode), providing insights into the application of COFs with customizable functional groups for UO 2 2+ adsorption.
研究领域:
环境科学
·
材料科学
·
放射性污染治理
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）