JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2024
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IF 1.5
Li Qi,Wang Jiaqi,Hou Hairui,Wang Min,Yu Shujun,Xu Huan,Fu Dong,Wang Xiangxue
In this work, an amidoxime functionalized graphitic carbon nitride (g–C 3 N 4 –AO) was prepared by grafting amidoxime groups onto graphitic carbon nitride (g–C 3 N 4 ). The results of the kinetic and isotherm studies conducted on g–C 3 N 4 –AO indicate it exhibits rapid sorption kinetics by achieving equilibrium in 30 min with a homogeneous surface which performed a maximum sorption capacity of 67.1 mg g −1 . The zeta potential values of the g–C 3 N 4 –AO are between 35 to − 44.3 mV in the pH range of 2.0–11.0. It was further observed that it complexes with uranium ions, which act as bidentate ligands, utilizing the lone pairs on O and N atoms. The empirical evidence strongly suggests that the utilization of g–C 3 N 4 –AO in uranium water remediation can be a promising solution. Graphical abstract
研究领域:
环境科学
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材料科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2024
·Vol. 48
·期 43
·18546-18557
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IF 2.7
Jiaxin Hu,Qihang Sun,Baoyu Li,Yunwen Liao,Juan Zhang,Jinming Chang,Hejun Gao,Hongquan Fu
The recovery of uranium from uranium-containing wastewater is crucial for the nuclear energy industry. Despite the effectiveness of photocatalytic reduction of uranium from U(VI) to U(IV) in treating uranium-containing wastewater, conventional organic conjugated semiconductors face challenges due to their high cost and reliance on inert gases. This study introduces an economical and eco-friendly approach using trimeric cyanuric chloride to construct a nitrogen-rich porous polymer (Py-NPP) with a short-range conjugated π unit and a pyrrole end-cap. Py-NPP demonstrated a remarkable removal efficiency of 93% in a 100 mg L−1 U(VI) solution, even reaching 89% under ambient air. Py-NPP demonstrated good stability, with a uranium removal rate still over 80% after being cycled four times. Moreover, it still exhibited a good removal rate under 500-fold salt concentration. The nitrogen-containing functional groups enhanced chelation with U(VI), while the triazine structure and short-range conjugation of the π unit boosted photocatalytic activity, facilitating charge separation and transfer. This study offers a promising strategy for efficient U(VI) reduction using short-range conjugated catalysts under ambient conditions.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Hao Liang,Wei Tian,Nana Wang,Hongping Zhang,Cuicui Li,Ruibin Guo,Nijuan Liu,Zunli Mo
Uranium extraction from seawater and the treatment of radioactive wastewater has traditionally been a hot topic. Herein, p(VPA-AM) n solid hydrogels with high uranium extraction properties based on vinylphosphonic acid (VPA) were successfully prepared by one-step copolymerization for the first time. The batch adsorption experiments demonstrated that p(VPA-AM) n has strong uranium chelating ability, fast uranium adsorption kinetics (within 200 min) and high uranium adsorption capacity (644.67 mg/g), and its adsorption behavior conforms to the pseudo-second-order kinetic model and the Langmuir adsorption isotherm model, which is a spontaneous heat-absorbing chemical monolayer adsorption process. After 15 adsorption–desorption tests, the adsorption capacity was kept above 96 % of the original capacity, and the uranium extracted from the salt lake water achieved at 3.56 mg/g, which showed superb behavior in treating complex uranium systems. Mechanism studies revealed that the strong interaction between UO 2 2 + and −PO 4 3- dominated the adsorption and the robust complexation might have led to the electron transfer in the structure. The maximum uranium removal rate of p(VPA-AM) n in simulated seawater reached 90 %, and the simple in situ zinc oxide-modified p(VPA-AM) n hydrogel showed good anti-biosludge properties against three common bacteria ( E. coli , B. subtilis and S. aureus ), which has a great potential for application in seawater uranium extraction and uranium wastewater treatment.
研究领域:
材料科学
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环境科学
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核能工程
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DOI
高影响因子
DESALINATION
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2024
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IF 8.3
Meng Cheng,Yuqi Liu,Hao Jiang,Chunling Li,Shuangqing Sun,Songqing Hu
Uranium extraction from seawater is critical for the development of nuclear energy, but the progress is still seriously limited by the performance and cost of current adsorbents. Herein, a convenient and general co-condensation process is designed to prepare amidoximated multi-shelled hollow mesoporous organosilica adsorbent (AO-HMO), which exhibits a high uranium extraction capacity of 862.07 mg·g −1 in uranium-spiked simulated seawater and 9.67 mg·g −1 in natural seawater. The run-through mesoporous structure and multi-shelled surface provide fast diffusion channels and more active sites for uranium adsorption. Moreover, AO-HMO exhibits a long service life due to its robust structure, maintaining an ideal adsorption capacity over 10 adsorption-desorption cycles. Coupled with the synthesis-cost advantage, AO-HMO will surely show great application potential in uranium extraction form seawater in future.
研究领域:
材料科学
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核能工程
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环境科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Tianhang Shan,Xin Ma,Hui Li,Chuntai Liu,Changyu Shen,Peipei Yang,Songwei Li,Zhenxing Wang,Zhong Liu,Hongguang Sun
It is critical for resource sustainability and environmental security to develop simple and dependable seawater uranium (VI) (U(VI)) enrichment technology. Membrane materials show excellent performance in the field of adsorption due to their pore structure and recyclability. In this study, a functional coating primarily composed of plant-derived tannic acid (TA) and polyethyleneimine was easily decorated on polyvinylidene fluoride (PVDF) microporous membranes for highly efficient uranium extraction via filtration. The synergistic effect of amino group from PEI and polyphenol structure plays an important role to achieve high adsorption capacity and rapid adsorption kinetics toward U(VI). Furthermore, the higher the molecular weight of PEI , the greater the modified membrane's adsorption capacity to U(VI). The membrane adorned with the optimized functional coating demonstrates outstanding removal rates (91%) and adsorption capacity (164.1 mg g −1 at C 0 = 99.55 mg L −1 ) under extremely high permeate flux (11324.54 L m −2 h −1 ) due to its high adsorption capacity and quick adsorption kinetics . Moreover, the functional coating also possesses excellent reusability, antifouling performance, high flux recovery rate (FRR) (∼ 98%) and low flux decay rate (FDR) (<5%) after ten cycles. Particularly, the membrane's U(VI) adsorption capability in natural seawater can increase to 6.86 mg g −1 . Considering the facile and mild modification process, as well as the green and low costing materials, the plant-derived hybrid coatings have a great application prospect in the field of seawater U(VI) extraction.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Wansheng Zhang,Yangyang Xin,Changlong Fang,Xingyong Han,Yifan Liu,Huimin Li,Fengwei Li,Yun Fa,Huizhou Liu
Selective extraction of uranium from seawater presents significant challenges due to the competing ions, bio-fouling and price. Inspired by the branching structure of plants, a multi-site synergistic adsorption strategy was proposed. Utilizing affordable and available sodium alginate (SA) and carboxymethyl chitosan (CMC) as the scaffold, and incorporating dendritic molecules, a phosphorylated multidentate coordination aerogel adsorbent (named CSPP) has been developed. Within hours CSPP achieved an impressive capacity of 723.4 mg g −1 , surpassing the performance of most standalone SA, CMCs, and phosphate-based materials. Additionally, CSPP demonstrates an outstanding selectivity ( K d = 4.0 × 10 4 ) in natural seawater, along with excellent stability, resistance to microbial contamination, and affordability (∼$200/kg U). The adsorption reaction accords with the pseudo-second-order model and is a spontaneous endothermic reaction. Both experimental and theoretical computational simulations have revealed a perfect tetradentate chelation: P O delivers the initial electrostatic attraction, C O tightens the angle, and the crown ether locks the equatorial plane of UO₂ 2+ . This bio-mimetic, multi-site blueprint redefines the economic frontier uranium adsorption from seawater, and illustrates the broad applicability of biomimetic design and multisite synergistic adsorption of valuable target ions.
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DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2022
·Vol. 331
·期 4
·1645-1658
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IF 1.754
Zhang Rui,Hou Wei,Wang Hongqiang,Hu Eming,Lei Zhiwu,Hu Fang,Zhou Wen,Wang Qingliang
The oxidation efficiency and leaching rate of ozone micro-nano bubbles (OMNBs) on UO 2 and sandstone uranium ore were explored and evaluated through a batch oxidation experiment of sandstone uranium ore and a continuous flow oxidation experiment of UO 2 . OMNBs can accelerate the rate of oxidative leaching. Oxidation mainly relies on ozone oxidation. Oxidation of sandstone uranium ore by OMNBs was feasible, and OMNBs may solve current problems encountered in production practice. The continuous flow experiment verified the feasibility of the large-scale experiment and provided a new method for CO 2 + O 2 ISL of uranium under normal pressure in the future.
研究领域:
化学工程
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环境科学
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矿业工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Zhongyue Li,Ruomeng Zhu,Pengling Zhang,Mei Yang,Ruiqi Zhao,Yanlong Wang,Xing Dai,Wei Liu
Selective uranium extraction from aqueous solution is critical for both radioactive contamination remediation and uranium recovery from seawater. Herein, amidoxime (−AO) and carboxyl (–COOH) groups are equipped on a polyarylether-based covalent organic framework (COF) for fabrication of post-modified adsorbents, JUC-505-AO and JUC-505-COOH. The maximum adsorption capacities (Q m ) of JUC-505-AO and JUC-505-COOH are 395 mg⋅g −1 and 464 mg⋅g −1 , respectively. JUC-505-COOH shows preponderant uranium extraction efficiencies of 36–95% at low pH 2–4, and its removal performances are almost unaffected at high temperature ranging from 25 to 80 °C. Whereas, JUC-505-AO exhibits an impressive adsorption kinetics with the adsorption process equilibrates within 20 min (C 0 = 20 mg⋅L -1 ) , and marked sorption selectivity toward uranium against coexisting metal ions. JUC-505-AO also capable of extracting uranium with fast kinetics and capacity (Q m = 4604 μg⋅g −1 ) from real seawater. U L 3 edge X-ray absorption spectra analysis reveals that uranyl ions in JUC-505-AO are anchored by coordinating with O and N from the oxime groups by η 2 mode with the coordination numbers of 5 or 6. Meanwhile, HOH⋅⋅⋅O hydrogen bonds between the coordinated water of the hydrated uranyl ions and the oxygen atoms on the skeleton of JUC-505-AO were observed by density functional theory simulations.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
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IF 3.141
Hui Zhang,Zhongran Dai,Yang Sui,Nieying Wang,Haiying Fu,Dexin Ding,Nan Hu,Guangyue Li,Yongdong Wang,Le Li
The impregnated water at a uranium tailings repository has characteristics that its uranium concentration is low and it contains many other interfering ions. In order to develop an efficient adsorbent for such wastewater, Mg-Al layered double hydroxide (Mg-Al-NO3-LDH) and tripolyphosphate intercalated LDH (TPP-LDH-1 and TPP-LDH-2) were synthesized by an anion exchange method and characterized by using multiple analysis techniques, and their behavior and mechanism for U(VI) removal from aqueous solutions were investigated. It is found that their adsorption capacities for U(VI) follow the order Mg-Al-NO3-LDH < TPP-LDH-1 < TPP-LDH-2. The maximum sorption capacities of Mg-Al-NO3-LDH, TPP-LDH-1, and TPP-LDH-2 for U(VI) at pH 5.0 and 298.15 K derived from the Langmuir model are 201.27, 399.01, and 501.76 mg/g, respectively. In addition, tripolyphosphate intercalated LDH show a higher sorption selectivity toward U(VI) over other metal cations and anions. X-ray photoelectron spectroscopy (XPS) and Fourier transform-infrared spectroscopy (FT-IR) characterizations suggest that the higher adsorption capacity and sorption selectivity of TPP-LDH-2 are probably due to the inner-sphere surface complexes resulting from the phosphate groups (P═O, −PO3) with U(VI). The applicability of TPP-LDH-2 for scavenging of U(VI) from the impregnated water at a uranium tailings repository in South China was further evaluated. It is found that TPP-LDH-2 shows excellent removal efficiency for U(VI). The results indicate that tripolyphosphate intercalated LDH is a promising adsorbent for scavenging of U(VI) from the impregnated water at the uranium tailings repository.
研究领域:
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
Journal of Water Process Engineering
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2022
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IF 7.34
Xiying Zhu,Lijia Liu,Yudan Wang,Fuqiu Ma,Yao Tian,Hongxing Dong,Chunhong Zhang
Seawater contains abundant uranium, which could provide a long–term supply for developing the nuclear power industry. Developing an efficient uranium–selective adsorbent is therefore an urgent requirement. In this work, we used a simple Friedel–Crafts alkylation reaction and a subsequent phosphorylation reaction to prepare porous phosphorylated hyper-crosslinked calix[4]arene (C4HP) for potential use in the recovery of uranium from seawater. The effect of the initial pH, adsorbent composition, sorbent dose and contact time on the sorption of uranyl ions was investigated. Because of the introduction of the phosphate groups , C4HP shows an excellent adsorption capacity of 336.4 mg·g −1 for uranium, which is much higher than that of hyper-crosslinked calix[4]arene (C4H) without phosphorylation. Meanwhile, C4HP functioned as a promising adsorbent for uranyl extraction with fast capture kinetics (the adsorption equilibrium can be reached in 150 min). After 6 cycles, C4HP maintained its original adsorption capacity of 76.2 % (255.4 mg·g −1 ). Furthermore, C4HP possesses excellent adsorption selectivity for uranium in artificial seawater, with a K d U of ~4.1 × 10 4 mL·g −1 , much higher than that of other metals. This makes it useful for broad applications and capturing uranium from natural seawater. The effective extraction of uranyl was primarily attributed to the chelation of uranyl ions with phosphate groups .
研究领域:
材料科学
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环境科学
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核能技术
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Yun-Han Mao,Qun-Yan Wu,Yu-Qian Zhong,Jian-Hui Lan,Hong-Bin Qi,Wei Jin,Zhi-Wei Huang,Kong-Qiu Hu,Wei-Qun Shi,Lei Mei
To mitigate ecological and public health threats of radionuclides, functional metal–organic frameworks (MOFs) can serve as ideal platforms for separation of radionuclides, but bioderived MOFs with low-cost, environmentally friendly organic blocks are still desiring. In this work, a new kind of bioderived ellagic acid (EA)-based thorium-organic framework materials is proposed for the first time. It is demonstrated that Th-EA with π–π stacking interactions for supporting the robust framework possesses excellent structural stability in aqueous solutions at pH 2–11 and achieves a maximum adsorption capacity of 229.1 mg·g −1 at pH 5 for uranyl ion through an ion-exchange process. Notably, such a bioderived material can serve a photocatalyst to produce a large amount of hydrogen peroxide (H 2 O 2 ) (≈170.2 µmol·g −1 ·h −1 ) from water and oxygen under visible light irradiation, which is able to greatly improve the uranyl removal rate to 96.2% by transforming adsorbed uranyl into the insoluble studtite phase. Furthermore, Th-EA can also serve as both excellent adsorbents and photocatalysts to achieve high-efficiency and selective removal of uranium from radio-contaminated tailing groundwater. This work demonstrates the feasibility of bioderived MOF materials for enhanced nuclide separation and will inspire the development of more low-cost, environment-friendly functional materials.
研究领域:
环境科学
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材料化学
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放射化学
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光催化
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核废料管理
✓ 已验证
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2025
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IF 1.6
Zhao Hongling,Fang Ranjie,Hu Maosong,Luo Jianqiang,Meng Cheng,Liu Shujuan,Ma Jianguo
In this work, a novel Fe/ND-CN composite was synthesized by anchoring iron single atoms onto nitrogen-deficient g-C 3 N 4 (ND-CN) using Fe-ZIF-8 as a precursor via calcination. This material served as a photoelectrocatalytic working electrode for U(VI) reduction under light and applied voltage. Remarkably, it achieved near-complete U(VI) removal (99.2%) at pH 5.0. The elucidated mechanism provides a highly efficient technique and theoretical foundation for low-concentration uranium wastewater treatment.
研究领域:
环境科学
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材料工程
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核化学
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水处理技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）