JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2019
·Vol. 319
·期 3
·1251-1259
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IF 1.186
Hui Junjie,Wang Youqun,Liu Yuhui,Cao Xiaohong,Zhang Zhibin,Dai Ying,Liu Yunhai
With the aim of gathering uranium from ground aquatic environment in which uranium mainly occurs in negative species, the montmorillonite (MT) intercalated with cetyltrimethylammonium bromide (CTAB) was fabricated. X-ray diffraction and Fourier transform infrared spectroscopy were utilized to prove the entrance of CTAB into MT. Adsorption of uranium onto CTAB-MT was studied with respect to effect of pH, carbonate, calcium, humic acid, contact time, initial uranium concentration, and temperature. The adsorption negatively depended on pH, carbonate and calcium ion and humic acid concentrations. CTAB-MT had a higher uranium adsorption ability. The maximum monolayer uranium adsorption amount of CTAB-MT calculated by well fitted Langmuir model was determined as 213.31 mg g −1 , preceding 82.17 mg g −1 of MT. The adsorption kinetics was well fitted by pseudo-second-order model. The uptake mechanism involved ion exchange and electrostatic attraction. The adsorption was endothermic and spontaneous. The results demonstrated CTAB-MT was promising to separate uranium from ground water.
研究领域:
环境科学
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化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Shizong Wang,Jiazhuo Wang,Yu Tian,Jianlong Wang
Priestia sp. WW1 was isolated from a uranium-contaminated mining soil and identified. The uranium removal characteristics and mechanism of Priestia sp. WW1 were investigated. The results showed that the removal efficiency of uranium decreased with the increase of initial uranium concentration. When the uranium initial concentration was 5 mg/L, the uranium removal efficiency achieved 92.1%. The increase of temperature could promote the uranium removal. Carbon source could affect the removal rate of uranium, which was the fastest when the methanol was used as carbon source. The solution pH had significant effect on the uranium removal efficiency, which reached the maximum under solution pH 5.0. The experimental results and FTIR as well as XPS demonstrated that Priestia sp. WW1 could remove uranium via both adsorption and reduction. The common chloride ions, sulfate ions, Mn(II) and Cu(II) enhanced the uranium removal, while Fe(III) depressed the uranium removal. The Priestia sp. WW1 could effectively remove the uranium in the actual mining groundwater, and the increase of initial biomass could improve the removal efficiency of uranium in the actual mining groundwater. This study provided a promising bacterium for uranium remediation in the groundwater.
研究领域:
环境微生物学
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生物修复
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水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Yucheng Song,Hui Li,Tianhang Shan,Peipei Yang,Songwei Li,Zhong Liu,Chuntai Liu,Changyu Shen
In this study, a composite hydrogel with a low swelling ratio, excellent mechanical properties, and good U (VI) adsorption capacity was developed by incorporating a metal-organic framework (MOF) with a poly (acrylamide- co -acrylic acid)/chitosan (P(AM-co-AA)/CS) composite. The CS chain, which contains NH 2 , reduces the swelling ratio of the hydrogel to 4.17 after 5 h of immersion in water. The coordinate bond between the MOF and carboxyl group on the surface of P(AM-co-AA)/CS improves the mechanical properties and stability of P(AM-co-AA)/CS. The U(VI) adsorption capacity of P(AM-co-AA)/CS/MOF-808 is 159.56 mg g −1 at C 0 = 99.47 mg L −1 and pH = 8.0. The adsorption process is well fitted by the Langmuir isotherm and pseudo-second-order model. The P(AM-co-AA)/CS/MOF-808 also exhibits good repeatability and stability after five adsorption–desorption cycles. The uranium adsorption capacity of the developed adsorbent after one month in natural seawater is 6.2 mg g −1 , and the rate of uranium adsorption on the hydrogel is 0.21 mg g −1 day −1 .
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2022
·Vol. 331
·期 11
·4635-4648
·
IF 1.754
Liu Chang,Li Ye,Liu Shuang,Zhou Yuzhi,Liu Dongxue,Fu Chengbin,Ye Lingfeng
In this work, an inexpensive PEI-AC sorbent was synthesized by facile hydrothermal grafting method and used to uranium capture from seawater. Batch experimental demonstrated that the optimal operation pH of PEI-AC was 6.0. The adsorption process is conformed to pseudo-second-order kinetic model and Langmuir monolayer adsorption isotherm, and the maximum equilibrium adsorption capacity reached 50.27 mg/g. The PEI-AC samples exhibited better selective and efficiency in various competing ions and uranium-spiked seawater. Furthermore, the removal efficiency remained 88.52% after five sequence adsorption/desorption experiments. By the analysis of XPS, the interaction of UO 2 2+ with N/O-containing ligands were the primary immobilization mechanism.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Xin Zhong,Wen Liang,Zhipeng Lu,Baowei Hu
In this investigation, TpPa-1 were synthesized and exploited for radionuclides ions elimination. According to Langmuir model, at pH 6.5 and 298 K, the maximum adsorption quantity of TpPa-1 were 1194.07 mg(U(VI))/g and 1107.63 mg(Eu(III))/g, respectively. The superior adsorption performance could be attributed to: (i) a great quantity of heteroatom activated sites on the pore wall could conduct as cation receptors; (ii) the forming intramolecular C N … H … O hydrogen bonding in the network of TpPa-1, which was U(VI) and Eu(III) ions adsorption sites; (iii) hydrogen bonding could adjust the electron density of the complex and abate the total charge of radionuclides. The outcomes of this work suggest that TpPa-1 is a promising adsorbent, which is appropriate to enrichment and separation radionuclides from polluted wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
·
IF 14.7
Lin Tao,Chen Tao,Jiao Chi,Zhang Haoyu,Hou Kai,Jin Hongxiang,Liu Yan,Zhu Wenkun,He Rong
Electrochemical uranium extraction from nuclear wastewater represents an emerging strategy for recycling uranium resources. However, in nuclear fuel production which generates the majority of uranium-containing nuclear wastewater, fluoride ion (F − ) co-exists with uranyl (UO 2 2+ ), resulting in the complex species of UO 2 F x and thus decreasing extraction efficiency. Herein, we construct Ti δ+ -PO 4 3− ion pair extraction sites in Ti(OH)PO 4 for efficient electrochemical uranium extraction in wastewater from nuclear fuel production. These sites selectively bind with UO 2 F x through the combined Ti-F and multiple O-U-O bonds. In the uranium extraction, the uranium species undergo a crystalline transition from U 3 O 7 to K 3 UO 2 F 5 . In real nuclear wastewater, the uranium is electrochemically extracted with a high efficiency of 99.6% and finally purified as uranium oxide powder, corresponding to an extraction capacity of 6829 mg g −1 without saturation. This work paves an efficient way for electrochemical uranium recycling in real wastewater of nuclear production.
研究领域:
环境科学
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核工程
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Huanhuan Dong,Xudong Wu,Lei Li,Ruixiang Wang,Qingqing Liu,Yihao Wang,Xun Yang,Mao Hu,Tao Chen
Advances in nuclear energy have led to steady accumulation of radioactive uranium wastewater, requiring the worldwide implementation of safe and efficient disposal methods. Adsorption has become a viable solution for purifying uranium-contaminated wastewater and recovering uranium resources due to its efficiency, environmental compatibility, and simplicity. This study utilized konjac glucomannan’s (KGM) gel properties to create a ZIF-8@KGM aerogel. Liquid nitrogen-induced rapid directional freezing combined with KGM’s exceptional plasticity yielded an aerogel with a uniform layered structure and directional channels. ZIF-8 (2-Methylimidazolezincsalt) particles are dispersed uniformly within the aerogel pores, significantly improving adsorption site accessibility. Compared with ZIF-8, the [email protected] aerogel achieved improved kinetics and adsorption capacity for uranium separation. After 90 min in a 200 mg/L acidic U(VI) solution, it achieved 96.4 % removal efficiency and a maximum capacity of 687.8 mg/g. Mechanistic studies revealed synergistic adsorption: KGM’s oxygen-containing functional groups coordinated with uranyl ions, together with the nitrogen-containing groups and hydroxyl Zn(Ⅱ) sites on ZIF-8 particles. Overall, this approach provides a promising strategy for uranium wastewater remediation that exhibits broader applicability in water treatment.
研究领域:
环境科学
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材料科学
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核工程
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化学工程
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水处理技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Miao Lei,Jun Zhang,Junhang Huang,Junpeng Guo,Chang Liu,Bolin Li,Ye Li
It is of great strategic value for the recovery of uranium resources in seawater. In this work, Fe 3 S 4 /Fe 7 S 8 was synthesized by hydrothermal method to extract the radioactive nuclides of U(Ⅵ). Results of batch experiment discovered that Fe 3 S 4 /Fe 7 S 8 exhibited good U(Ⅵ) removal performance in a wide pH response range, and also had satisfactory selectivity towards uranyl ions even in the presence of co-existing ions (such as K + , Na + , Mg 2+ , Ca 2+ , Cl - , SO 4 2- ). At the temperature of 25°C and pH of 9, the adsorption achieved equilibrium after 120 min with the maximum adsorption capacity of 257.07 mg/g. In addition, the 5 successive adsorption-regeneration experiment and the real seawater experiment of trace U(Ⅵ) adsorption implied that Fe 3 S 4 /Fe 7 S 8 had outstanding reusability and practical application potential in U(Ⅵ) extraction. XRD results showed that the magnetic adsorbent was composed of Fe 3 S 4 and Fe 7 S 8 , with a high crystallinity and stable structure. The ratio of iron to sulfur was close to 7:8 according to semi-quantitative results of SEM-EDS . Further characterization analysis of FTIR and XPS revealed that the removal mechanism of Fe 3 S 4 /Fe 7 S 8 towards U(Ⅵ) mainly included the complexation of S(-Ⅱ), and the reduction of S 2− , S 2 2- and Fe(Ⅱ).
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
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2019
·Vol. 321
·期 2
·671-681
·
IF 1.186
Xiu Taoyuan,Liu Zhirong,Yang Lingfang,Wang Yun
The hydrated manganese dioxide (HMO) was synthesized by hydrothermal process using MnSO 4 and KMnO 4 . The adsorption of HMO for Th(IV) and U(VI) were investigated by batch static adsorption experiments. The HMO and MnO 2 were characterized by FT-IR, XRD and SEM. At the same time, the adsorption mechanism is discussed. The adsorption process was in line with the pseudo-second-order kinetic model and Langmuir isothermal model. The maximum adsorption capacities were Th ( T = 308 K, C 0 = 200 mg L −1 , q max = 218.34 mg g −1 ) and U ( T = 308 K, C 0 = 200 mg L −1 , q max = 55.19 mg g −1 ).
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 SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Yu Liu,Changting Chen,Jianqiang Luo,Shujuan Liu,Jianguo Ma
Photoelectrocatalytic (PEC) reduction of soluble U(VI) to insoluble U(IV) represents a highly promising strategy for uranium removal. The design of photoelectrode materials with superior photoelectrochemical performance is crucial for enhancing PEC efficiency. In this study, an MXene-supported Co-NC (Co-NC/MXene) photoelectrode was successfully fabricated through electrostatic self-assembly. Compared to individual electrocatalytic (EC) and photocatalytic (PC) systems, the PEC system achieved an optimal U(VI) removal efficiency of 99.1 % with a rate constant of 0.116 min −1 , demonstrating reaction rates 13.4 times and 29.3 times higher than those of EC and PC systems, respectively. The Co-NC/MXene electrode exhibited exceptional adsorption capacity (3993.54 mg g −1 for 500 ppm) and maintained over 80 % removal efficiency after six consecutive cycles, highlighting its outstanding stability. This work provides novel insights into the application of MOF-derived/MXene materials for highly efficient U(VI) removal from aqueous solutions.
研究领域:
环境科学
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材料科学
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核化学
·
电化学
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Zhang Qing Yun,Zhang Lin Juan,Zhu Jian Qiu,Gong Le Le,Huang Zhe Cheng,Gao Feng,Wang Jian Qiang,Xie Xian Qing,Luo Feng
With the rapid development of nuclear energy, problems with uranium supply chain and nuclear waste accumulation have motivated researchers to improve uranium separation methods. Here we show a paradigm for such goal based on the in-situ formation of π - f conjugated two-dimensional uranium-organic framework. After screening five π -conjugated organic ligands, we find that 1,3,5-triformylphloroglucinol would be the best one to construct uranium-organic framework, thus resulting in 100% uranium removal from both high and low concentration with the residual concentration far below the WHO drinking water standard (15 ppb), and 97% uranium capture from natural seawater (3.3 ppb) with a record uptake efficiency of 0.64 mg·g −1 ·d −1 . We also find that 1,3,5-triformylphloroglucinol can overcome the ion-interference issue such as the presence of massive interference ions or a 21-ions mixed solution. Our finds confirm the superiority of our separation approach over established ones, and will provide a fundamental molecule design for separation upon metal-organic framework chemistry.
研究领域:
核能
·
材料科学
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环境科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Zhineng Wu,Zengyuan Li,Xiajie Liu,Peng Zhang,Yingzhe Du,Peng Lin,Min Zhao,Xiaojing Lu,Duoqiang Pan,Wangsuo Wu
Efficient uranium removal from strongly acidic nuclear waste is crucial for sustainable nuclear energy, yet extreme acidity greatly challenges extraction. In order to provide a solution for uranium removal from strongly acidic waste, a phosphonic acid polymer, P(VPA-TEGDMA), was synthesized via solvothermal copolymerization of vinylphosphonic acid (VPA) and triethylene glycol dimethacrylate (TEGDMA). P(VPA-TEGDMA) demonstrated exceptional acid stability and outstanding adsorption performance for uranium in strongly acidic conditions. P(VPA-TEGDMA) achieved a maximum uranium adsorption capacity of 339.6 mg·g–1 in 4 mol L–1 HNO3, surpassing most reported adsorbents. In addition, the adsorbent exhibited good selectivity and maintained a high adsorption performance for uranium after 5 adsorption–desorption cycles. An adsorption mechanism study revealed that uranyl ions were coordinated tightly by P═O groups in the polymer. This work offers insights for designing robust phosphonic acid polymer adsorbents for uranium extraction to tackle nuclear waste management challenges in highly acidic environments.
研究领域:
核废料管理
·
环境修复
·
聚合物化学
·
吸附技术
·
无机化学
✓ 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）