INORGANIC CHEMISTRY
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2017
·
IF 4.857
Jian Lin,Meiying Qie,Linjuan Zhang,Xiaomei Wang,Yuejian Lin,Wei Liu,Hongliang Bao,Jianqiang Wang
Systematic control of the molar ratio between thorium hydroxides and selenic acid and their reaction temperature under hydrothermal conditions results in four novel thorium-based selenate complexes, namely, [Th8O4(OH)8(SeO4)6(H2O)16]·(SeO4)2·13H2O (Th-1), [Th8O4(OH)8(SeO4)8(H2O)13]·7H2O (Th-2), Th(OH)2(SeO4)H2O (Th-3), and Th3(SeO4)6(H2O)6·2.5H2O (Th-4), as well as the thorium mixed selenite selenate compound Th(SeO3)(SeO4) (Th-5). Smaller [H2SeO4]/[Th(IV)] ratio or lower temperature give rise to the formation of octameric [Th8(μ3-O)4(μ2-OH)8]16+ cores in Th-1/Th-2 and infinite [Th(μ2-OH)2H2O]2+ chains in Th-3, respectively. Increasing the [H2SeO4]/[Th(IV)] ratio or elevating the temperature generates a microporous (11.3 Å voids) open-framework Th-4, a monomeric thorium species without oxo/hydroxyl ligands, and a three-dimensional thorium structure Th-5. Formation of these compounds suggests that variables including acidity and temperature play a critical role in the hydrolysis and oligomerization of ThIV ions. Increasing acidity limits the deprotonation of water molecules and formation of nucleophilic hydroxo/oxo-aquo Th species, and high temperature appears to suppress the olation/oxolation hydrolysis reactions, which in both ways limit the formation of the thorium oligomers.
研究领域:
无机化学
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放射化学
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材料科学
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水热合成
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核材料
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2023
·Vol. 332
·期 6
·1953-1960
·
IF 1.6
Luo Qingyun,Wang Chongshi,Zhu Wei,Yu Hongchao,Wang Chunyan,Chen Chuanhong
Due to its high adsorption capacity and adsorption efficiency, polymer gel shows excellent performances in the treatment of wastewater containing thorium. In this work, glutaraldehyde cross-linked N -(4-Aminobenzoyl)-ʟ-glutamic acid modified chitosan (CCS-AGA) was used to adsorb Th(IV) ions from aqueous solutions for the first time. FT-IR and SEM results revealed the chemical structure and surface morphology of this material. The influence of solution pH, contact time and initial concentration of Th ions on the adsorption of Th(IV) by CCS-AGA was investigated. The experimental data suggest that the adsorption behavior of CCS-AGA could be accurately predicted by the Langmuir model. The maximum theoretical adsorption capacity of CCS-AGA for Th(IV) was 162 mg/g. Moreover, this material exhibited excellent reusability and adsorption selectivity for Th(IV).
研究领域:
环境科学
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材料科学
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NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Shangjie Zhao,Long Chen,Jicong Li,Xiaofan Ding,Ke Ma,Jing Zhao,Ran Zhang,Ke Wang,Jinping Liu,Songtao Xiao
Efficient separation and recovery of thorium(IV) are essential for a sustainable nuclear fuel cycle and environmental protection. Imine-based covalent organic frameworks (COFs) often face challenges due to mismatches between pore structures and mass-transfer processes during adsorption. To tackle this issue, we used 1,3,6,8-tetrakis(4-formylphenyl)pyrene (TFPPy) as a building block, incorporating large PyTTA and small BDA as linkers. We synthesized two COFs with varying pore sizes, COF-1 and COF-2, using a solvothermal method to create distinct pore environments. We systematically examined their impact on Th(IV) adsorption behavior. COF-1, with its dense skeleton, maximized active-site density and achieved excellent pore-size matching, resulting in high selectivity and a saturated adsorption capacity of approximately 200 mg·g⁻¹ at pH 4.5 and 298 K. In contrast, COF-2 formed an open framework with larger pores, enhancing mass transfer and providing faster adsorption kinetics. These findings highlight the distinct influence of pore-size engineering on adsorption capacity and kinetics, demonstrating a differentiation strategy.
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高影响因子
ENVIRONMENTAL POLLUTION
·
2019
·
IF 5.714
Zhi-Wei Huang,Zi-Jie Li,Li-Rong Zheng,Wang-Suo Wu,Zhi-Fang Chai,Wei-Qun Shi
One of the most important reasons for the controversy over the development of nuclear energy is the proper disposal of spent fuel . Separation of actinide and lanthanide ions is an important part of safe long-term storage of radioactive waste . Herein, a three-dimensional (3D) graphene-based macrostructure (GOCS) was utilized to remove actinide thorium and lanthanide europium ions from aqueous solutions. The adsorption of Eu(III) and Th(IV) on the GOCS was evaluated as a function of adsorption time, solution pH, initial ion concentrations , and ionic strength. The experimentally determined maximum adsorption capacities of this GOCS for Eu(III) (pH 6.0) and Th(IV) (pH 3.0) are as high as 150 and 220 mg/g, respectively. By using Fourier transformation infrared (FT-IR), X-ray photoelectron (XPS), and extended X-ray absorption fine structure (EXAFS) spectroscopy, we concluded that the Eu(III) and Th(IV) adsorption was predominantly attributed to the inner-sphere coordination with various oxygen- and nitrogen-containing functional groups on GOCS surfaces. Our selective adsorption results demonstrate that the actinide and lanthanide ions can be effectively separated from transition metal ions . This study provides new clues to the overall recycling of actinide and lanthanide ions in radioactive environmental pollution treatments.
研究领域:
环境科学
·
放射化学
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Lijun Guo,Liangqiong Peng,Jiheng Li,Wenhua Zhang,Bi Shi
Thorium (Th) and uranium (U) separation remains a huge challenge due to their high similarity in chemical behavior. In this study, lignin-derived magnetic biochar (AL-Fe/BC), which can provide functional sites for adsorbing Th(IV) and U(VI), was synthesized for the selective extraction of Th(IV) from the binary U(VI)-Th(IV) matrix. Characterizations results confirm the successful zero-valent iron loading, and the AL-Fe/BC exhibited a developed polyporous structure, high surface area, stable crystallinity, high defects degree, and advantageous magnetic feature of expedient recovery from water without energy consumption. The optimist AL-Fe/BC-800 showed an outstanding adsorption capacity with a maximal Th(IV) uptake of 2000 mg/g, and a small absorption of 3 mg/g of U(VI) (Th(IV) = 180 mg/L, U(VI) = 20 mg/L, AL-Fe/BC-800 = 0.05 g/L). Moreover, the separation factor of Th(IV) from the Th(IV)-U(VI) matrix reached 90,000 even concomitant with high a concentration of co-existing ions. The active adsorption sites on AL-Fe/BC-800, such as COOH, C-OH, C=O, pyridinic N, graphitic N, and pyrrolic N, exhibited a stronger binding affinity with Th(IV) than U(VI), achieving selective Th(IV) adsorption via a chemisorption process on the basis of competitive adsorption. In summary, AL-Fe/BC-800 is a potential adsorbent in industrial application for the superefficient separation of Th(IV) and U(VI) with high-performance magnetic recovery, promoting the sustainable development of nuclear industry, especially considering the necessary development of Th(IV) fuel.
研究领域:
环境科学
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材料科学
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2016
·
IF 4.836
Ning Pan,Long Li,Jie Ding,Shengke Li,Ruibing Wang,Yongdong Jin,Xiangke Wang,Chuanqin Xia
Manganese dioxide decorated graphene oxide (GOM) was prepared via fixation of crystallographic MnO 2 (α, γ) on the surface of graphene oxide (GO) and was explored as an adsorbent material for simultaneous removal of thorium/uranium ions from aqueous solutions. In single component systems (Th(IV) or U(VI)), the α-GOM 2 (the weight ratio of GO/α-MnO 2 of 2) exhibited higher maximum adsorption capacities toward both Th(IV) (497.5 mg/g) and U(VI) (185.2 mg/g) than those of GO. In the binary component system (Th(IV)/U(VI)), the saturated adsorption capacity of Th(IV) (408.8 mg/g)/U(VI) (66.8 mg/g) on α-GOM 2 was also higher than those on GO. Based on the analysis of various data, it was proposed that the adsorption process may involve four types of molecular interactions including coordination, electrostatic interaction, cation-pi interaction, and Lewis acid-base interaction between Th(IV)/U(VI) and α-GOM 2 . Finally, the Th(IV)/U(VI) ions on α-GOM 2 can be separated by a two-stage desorption process with Na 2 CO 3 /EDTA. Those results displayed that the α-GOM 2 may be utilized as an potential adsorbent for removing and separating Th(IV)/U(VI) ions from aqueous solutions.
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
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2020
·
IF 10.257
Min Qing,Sheng Liang Chen,Lei Han,Yu Zhu Yang,Hong Qun Luo,Nian Bing Li
Herein, an innovative photocathodic enzymatic biosensor is proposed with poly {4,8-bis[5-(2-ethylhexyl)thiophen-2-yl]-benzo[1,2-b:4,5-b']dithiophene-2,6-diyl-alt-3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophene-4,6-diyl} (PTB7–Th) as donor–acceptor–type photoactive material and three–dimensional (3D) polyaniline hydrogels (PAniHs) as both electron transfer layer and biomolecule carrier. Based on the enhancement effect of PAniHs on the charge separation and electron transfer of PTB7–Th and the competitive consumption of dissolved oxygen (O 2 ) between the xanthine oxidase (XOD)–guanine catalytic reaction and O 2 –sensitive PTB7–Th/PAniHs, the proposed photocathodic enzymatic biosensor has been demonstrated to detect guanine with the advantages of low limit of detection (0.02 μM), wide linear range (from 0.1 to 80 μM), simple and convenient preparation process, satisfactory stability, and photochemical signal amplification independent of any exogenous electron donor/acceptor or sensitizer. Remarkably, the proposed photocathodic enzymatic biosensor can not only be extended to other aerobic enzymatic bioanalyses, but also pave a horizon for the application of environmentally friendly conductive hydrogel materials in photoelectrochemical bioanalysis .
研究领域:
分析化学
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生物化学
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材料科学
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DOI
PubMed
高影响因子
TALANTA
·
2009
·
IF 3.206
Canrong Lin,Hongqing Wang,Yuyuan Wang,Zhiqiang Cheng
A new pyrazole derivative 1-phenyl-3-methylthio-4-cyano-5-acrylicacidcarbamoyl-pyrazole (PMTCAACP) was synthesized and chosen as a complexing monomer for the preparation of surface-grafted ion-imprinted polymers for selective solid-phase extraction of thorium(IV). The silica gel, modified with maleic anhydride , was prepared as a carrier material. In the ion-imprinting process, Th(IV) was complexed with PMTCAACP, and then imprinted in the polymers grafted to the surface of modified silica gel. Subsequently, the template Th(IV) ions were removed with 6 mol/L HCl solution. The obtained ion-imprinted particles for Th(IV) showed specific recognition, and rapid adsorption and desorption kinetics process. The maximum static and total dynamic adsorption capacity of the ion-imprinted polymers (IIPs) for Th(IV) was 64.8 and 37.4 mg/g, respectively. The relative selectivity coefficient values of the imprinted adsorbent for Th(IV)/U(VI), Th(IV)/Ce(III), Th(IV)/La(III), and Th(IV)/Zr(IV) were 72.9, 89.6, 93.8, and 137.2 times greater than non-imprinted matrix, respectively. The interference effect of common cations tested did not interfere with the recovery of Th(IV). The enhancement factor of 20.2, the detection limit of 0.43 μg/L, and the precision of 2.47% ( n = 7) of the method under the optimized conditions were obtained. Additionally, the calibration curve ( r = 0.9993) was linear in the range of 1.43–103 μg/L of thorium(IV). The prepared IIPs were shown to be promising for solid-phase extraction coupled with UV–vis spectrophotometry for determination of trace Th(IV) in real samples.
研究领域:
化学
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材料科学
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分析化学
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高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2017
·Vol. 315
·期 1
·103-110
·
IF 1.282
Wang Zhongtang,Lin Jinxian,Li Sixuan,Guo Qiuju,Huang Wenna,Wen Wei,Dan Guiping,Tan Zhaoyi
To rapidly assess the contamination of actinides in emergency water, a method was developed to simultaneously analyze U, Th, Pu and Am. The method consists of two steps: extraction chromatographic separation using UTEVA and DGA resins and isotopic determination of actinides by inductively coupled plasma mass spectrometry (ICPMS). The whole analytical procedure takes only 8 h and high chemical recoveries of actinides were obtained. The cross spectral interferences between actinides in ICPMS measurement were sufficiently removed. The accuracy was validated by analyzing IAEA-443 seawater sample. The low limits of detection of actinides allow this method to distinguish low level contamination.
研究领域:
环境科学
·
核化学
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高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2019
·Vol. 321
·期 2
·733-745
·
IF 1.186
Hu Peizhuo,Nan Yu,Tai Wenya,Shan Qiang,Zhong Yi,Lei Zhiwei,Liu Tonghuan,Chen Suwen,Qian Lijuan
Modification of silica gel by butanedioic anhydride (SiO 2 –BDAH) results in efficient adsorbents for removal of U(VI), Th(IV), and Eu(III) from aqueous solutions. SiO 2 –BDAH was characterized by Fourier Transform infrared spectroscopy, elemental analysis, N 2 adsorption–desorption isotherms, thermogravimetic analysis, and potentiometric titration. The effect of contact time, pH, and initial concentration of radioactive solutions and temperature on the adsorption capacity of the sorbent was investigated. The sorption equilibrium times of U(VI), Th(IV), and Eu(III) onto SiO 2 –BDAH were 1.5, 2, and about 10 h. The sorption percentages of U(VI), Th(IV), and Eu(III) increased with increased pH from 1 to 5. The sorption process of U(VI), Th(IV), and Eu(III) can be described by the Langmuir model, with sorption capacities of 5.10 × 10 −5 , 5.06 × 10 −5 , and 3.44 × 10 −5 mol/L, respectively. The enthalpy and entropy changes were all positive, whereas the free energy changes were negative. This study indicated that SiO 2 –BDAH can remove U(VI) and Th(IV) at the same time in the presence of multiple ions from waste water quickly.
研究领域:
环境科学
·
放射化学
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高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-13
·
IF 4.259
Wang Hetong,Song Laiyu,Ju Wenhui,Wang Xuguang,Dong Lu,Zhang Yining,Ya Ping,Yang Chun,Li Fasheng
PM 2.5 is the main particulate air pollutant whose aerodynamic diameter is less than 2.5 micron. The inflammation of various respiratory diseases are associated with PM 2.5 inhalation. Pro-inflammatory cytokine IL-1β generated from effected cells usually plays a crucial role in many kinds of lung inflammatory reactions. The exacerbation of Th immune responses are identified in some PM 2.5 related diseases. To elucidate the underlying mechanism of PM 2.5 -induced acute lung inflammation, we exposed Balb/c mice to PM 2.5 intratracheally and established a mice model. Acute lung inflammation and increased IL-1β expression was observed after PM 2.5 instillation. Regulatory factors of IL-1β (TLR4/MyD88 signaling pathway and NLRP3 inflammasome) participated in this lung inflammatory response as well. Treatment with compound essential oils (CEOs) substantially attenuated PM 2.5 -induced acute lung inflammation. The decreased IL-1β and Th immune responses after CEOs treatment were significant. PM 2.5 may increase the secretion of IL-1β through TLR4/MyD88 and NLRP3 pathway resulting in murine airway inflammation. CEOs could attenuate the lung inflammation by reducing IL-1β and Th immune responses in this model. This study describes a potentially important mechanism of PM 2.5 -induced acute lung inflammation and that may bring about novel therapies for the inflammatory diseases associated with PM 2.5 inhalation.
研究领域:
免疫学
·
呼吸医学
·
环境健康
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DOI
PubMed
高影响因子
FISH & SHELLFISH IMMUNOLOGY
·
2025
·
IF 3.9
Wei Feng,Sheng Huang,Aodi Yi,Xueqian Wang,Yukun Wu,Xuesong Li,Nuo Yang,Lixia Fan,Guiying Guo,Jiping Zheng
Aeromonas dhakensis is a zoonotic pathogen responsible for severe infections in both humans and aquatic organisms. The increasing incidence of antibiotic resistance in A. dhakensis strains underscores the urgent need for alternative control strategies, such as vaccines. In this study, a quadruple gene deletion mutant of A. dhakensis Δ aart was generated by targeting the virulence genes: aer A, ahh 1, rtx A, and th . The Δ aart exhibited significantly reduced virulence in hemolytic activity and cytotoxicity, whereas no impairment in bacterial growth. Using zebrafish model, the LD 50 of Δ aart was 136-fold higher than that of the wild-type strain. Following immunization, the peak expression of innate immune-related genes ( SOD , CAT , LZM , TNF-α , IL-6 , IL-1β ) in the kidney was observed on day 3, followed by a decline; MHC-I peaked on day 7, and IL-10 on day 14, with similar trends noted in the intestine, while MHC-I did not show significant changes. Notably, IgM levels in the immunized zebrafish increased significantly at day 7 post-immunization, peaked at day 14, and remained at a high level at day 28. Furthermore, the Δ aart provided substantial protection against wild-type A. dhakensis infection, with a relative percent survival (RPS) of 56.67%, and less lesion was observed in intestines and kidney histopathology. These findings suggest that the Δ aart mutant holds promise as a safe and effective live-attenuated vaccine candidate for controlling A. dhakensis infections.
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高影响因子
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