INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
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2011
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IF 1.169
Canrong Lin,Hongqing Wang,Yuyuan Wang,Li Zhou,Jun Liang
A novel ion-imprinted adsorbent for selective solid phase extraction of thorium(IV) based on the surface of silica gel was prepared by a surface-grafted technique with methacrylic acid (MAA) as a functional monomer. After removal of Th(IV) ions with 3 mol L−1 HCl solution, the obtained imprinted particles for Th(IV) exhibited specific recognition and relatively rapid kinetic process. The maximum static and total dynamic adsorption capacity of the ion-imprinted polymers (IIPs) for Th(IV) was 33.2 and 17.3 mg g−1, respectively. A comparison of the selectivity coefficient of the imprinted polymers with that of non-imprinted polymers showed that the imprinted matrix for Th(IV)/U(VI), Th(IV)/Ce(III), Th(IV)/La(III) and Th(IV)/Zr(IV) was 58.8, 107, 106.4 and 151.7 times greater than non-imprinted matrix, respectively. With a series of samples loading flow rate of 3 mL min−1 for preconcentration, an enrichment factor of 14.6 and the detection limit of 0.59 µg L−1 were obtained. The relative standard deviation of the method under optimum conditions was 2.1% (n = 7). The developed method was successfully applied to the determination of trace Th(IV) in real water samples with satisfactory results.
研究领域:
分析化学
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环境科学
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Dandi Zhou,Min Wang,Jing Dong,Shiyun Ai
The rapid and sensitive detecting technique for subgroup J of avian leukosis viruses (ALVs-J) needs to be developed as soon as possible in order to not only reduce economic losses but also ensure the food safety. In this paper, a novel electrochemical immunosensor was built based on mesoporous graphitic carbon nitride (mpg-C 3 N 4 ). Mpg-C 3 N 4 was used as the sensor platform to bond with the primary antibodies (Ab 1 ). The compound of thionine and mpg-C 3 N 4 (Th-mpg-C 3 N 4 ) was synthesized for the first time to serve as the electroactive probe as well as the carrier of secondary antibodies (Ab 2 ). Compared to bulk g-C 3 N 4 , mpg-C 3 N 4 possesses larger specific surface area, smaller electrochemical resistance and abundant active sites. So the proposed electrochemical immunosensor exhibited amplified detective signals which realized the sensitive detection of ALVs-J. Under the opitimized conditions, the immunosensor exhibited outstanding analytical performance for the detection of ALVs-J whose titer ranged from 10 2.08 to 10 4.0 TCID 50 /mL (TCID 50 : 50% tissue culture infective dose) with a low detection limit of 120 TCID 50 /mL (S/N = 3). The sensitivity of the immnosensor was 6.15 μA/(TCID 50 /mL). This high sensitive immunosensor also displayed good selectivity, reproducibility and stability. Last but not least, this new strategy may be of great promise for clinic application in the future.
研究领域:
生物医学工程
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免疫学
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病毒学
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分析化学
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纳米生物技术
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2017
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IF 4.233
Ning Pan,Long Li,Jie Ding,Ruibing Wang,Yongdong Jin,Chuanqin Xia
A novel approach for facile covalent functionalization of graphene oxide (GO) was proposed in the present study in order to effectively avoid necessary anhydrous conditions and the usage of harsh reagents during the chemical functionalization of GO. Herein, a GO derivative that was functionalized with a primary amine derivative bearing a positively charged quaternary ammonium group, GO-S, was synthesized through a Schiff base condensation reaction between the amine groups of the primary amine derivative and the aldehyde groups of GO. The introduction of the quaternary ammonium groups can prevent GO from stacking and improve the dispersibility of GO after modification. The formation of imine bonds ( N CH ) between the primary amine and GO has been confirmed by Fourier transform infrared and X-ray photoelectron spectroscopy. The GO-S demonstrated good dispersion stability in aqueous medium and also exhibited better adsorption performance than GO for Th(IV) and U(VI), with a maximum thorium adsorption capacity of 2.22 mmol/g and a maximum uranium adsorption capacity of 0.83 mmol/g, suggesting a great potential for the application of graphene oxide-based materials for facilitating the removal of Th(IV) and U(VI) from nuclear waste solutions.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2018
·Vol. 44
·期 4
·2889-2911
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IF 1.674
Qi Caixia,Liu Huijun,Deng Shanxia,Yang AoHui,Li Zhendong
The inclusion complex (sulfated-β-CD@NAA) of sulfated β-cyclodextrin and α-naphthylacetic acid was synthesized for adsorption of low concentrations of thorium from aqueous solutions. The structure and property of sulfated-β-CD@NAA were characterized by Fourier transform infrared spectroscopy, thermogravimetric, X-ray diffraction, proton nuclear magnetic resonance, specific surface area measurement and scanning electron microscopy. The characterization analysis confirmed the formation of new solid phase. The results indicated that α-naphthylacetic acid embedded into the cavity of sulfated β-cyclodextrin partly from the secondary face and the thermal stability of inclusion complex was significantly increased. The experiments were designed by Box–Behnken design combined with response surface methodology. The adsorption parameters of pH value, contact time, initial concentration were used as the independent variables and their effects were investigated on the Th(IV) adsorption capacity. Second-order polynomial regression models were derived and analysis of variance was utilized to judge the adequacy of the chosen models. The maximum Th(IV) adsorption capacity (12.75 mg g −1 ) was achieved under the following conditions: pH value 2.5, contact time 35 min, initial concentration 30 mg L −1 . Prediction of models was in good agreement with experimental results. The experimental adsorption kinetic data followed a pseudo-second-order equation with the correlation of 0.9996, indicating the chemical adsorption. The obtained equilibrium isotherm data were fitted well with Langmuir model in the concentration range considered. The thermodynamic parameters ( ∆H 0 < 0, ∆S 0 < 0, ∆G 0 < 0) indicated that the adsorption process was exothermic and spontaneous. Regeneration of Th(IV)-loaded sulfated-β-CD@NAA with 0.1 M HNO 3 solution, and the regenerated sulfated-β-CD@NAA can be reused for adsorption of Th(IV).
研究领域:
环境科学
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化学工程
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 1
·120898
·
IF 7.2
Jing Wang,Guangxi Wang,Xiaoyan Ji,Zhiwen Chang,Yu Wang,Wenguang Chen,Leilei Zhang,Shuwen An,Yi Gu,Jun Liu
The mining, processing, and refining of rare-earth ores generate Th-rich radioactive wastewater, making its effective treatment critical for environmental protection and public health. In this study, mesoporous MoX 2 -α-ZrP (X = S, Se) composite powders were synthesized for Th(IV) adsorption from aqueous solutions. Under the conditions of [Th(IV)] initial = 50 ± 2 mg·L −1 , pH initial = 3, temperature = 298 K, and a contact time = 1440 min, the larger pore volume and pore width of the composites, compared with α-ZrP, enhanced the adsorption capacity ( q e ) of MoSe 2 -α-ZrP and MoS 2 -α-ZrP to 146.3 ± 7.4 mg·g −1 and 143.7 ± 2.5 mg·g −1 , respectively. Higher pH, [Th(IV)] initial, and temperature further enhanced Th(IV) adsorption. Notably, MoX 2 -α-ZrP removed Th(IV) from simulated leaching solution of monazite or bastnaesite and selectively adsorbed Th(IV) in the presence of co-existing ions. Thermodynamic and kinetic analyses confirmed a spontaneous, endothermic, and homogeneous chemisorption behavior. The Thomas and Yoon-Nelson models accurately described dynamic column Th(IV) adsorption, and increases in adsorbent mass, together with decreases in influent Th(IV) concentration, and reduced flow rate extended both breakthrough and saturation times. Mechanistic studies revealed Th(IV) coordination with oxygen-containing groups, ion exchange with -OH, and electrostatic interaction with phosphate groups. Results from our study can help explore the adsorption behaviors and mechanisms of Th(IV) on potential MoX 2 (X = O, S, Se)-based or α-ZrP-based materials for treating Th-rich radioactive wastewater.
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高影响因子
Journal of Physical Chemistry Letters
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2022
·
IF 6.888
Siyuan Weng,Man Zhao,Dayong Jiang,Qingcheng Liang
Both flat-spectrum responsivity and high external quantum efficiency (EQE) of bulk heterojunction organic photodetectors (BHJ OPDs) are greatly in demand and still challenging to realize from the ultraviolet (UV) to near-infrared (NIR) regions. In this article, conjugated polymer donor poly(3-hexylthiophene) (P3HT) and PTB7-Th are blended with a low band gap nonfullerene acceptor (NFA) IEICO-4F to form a ternary BHJ active layer, thereby forming a BHJ OPD with a broadband responsivity spectrum from UV to visible light to NIR region (200–1100 nm). Under 6 V voltage and in the range from 280 to 810 nm, the ternary BHJ OPD shows a relatively flat responsivity spectrum, and the highest responsivity is 1.348 A/W, which is 1.34 times that of the binary BHJ OPD. Specifically, the ternary BHJ OPD achieved the highest EQE at 285 nm and as high as 449.31%. In addition, the ternary OPD detectivity (D*) is 2.65 times that of the binary BHJ OPD. Therefore, ternary BHJ as an active layer provides an effective method to develop BHJ OPDs with an expanded response range, higher responsivity, improved EQE, and broadband spectrum with flat spectral response from the UV to NIR region.
研究领域:
有机电子学
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光电子学
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材料科学
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半导体器件
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光子学
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DOI
高影响因子
SOLVENT EXTRACTION AND ION EXCHANGE
·
2017
·
IF 2.456
Haiqin Wei,Yanling Li,Zhifeng Zhang,Tianyu Xue,Shengting Kuang,Wuping Liao
The extraction and separation of Ce(IV) and Th(IV) from trivalent rare earths (RE, including scandium) in sulfate medium using di(2-ethylhexyl)-N-heptylaminomethylphosphonate (DEHAMP, L) were studied. The effects of H2SO4 concentration, extractant concentration, and temperature on the metal extraction were investigated systematically. It was found that the extraction of metal ions by DEHAMP decreases in the following order: Ce(IV) > Th(IV) > Sc(III) > other RE(III). A possible extraction mechanism was proposed and the extracted complexes as Ce(SO4)2·2L and Th(HSO4)2SO4·L were determined by the slope analysis method. Thermodynamic parameters (ΔH, ΔG, and ΔS) were calculated. The extraction reactions of Ce(IV) and Th(IV) were each exothermic processes. The loaded Ce(IV) and Th(IV) can be stripped efficiently by 3% H2O2 and 4 mol/L HCl, respectively. The extraction capacity of 0.63 mol/L DEHAMP is 30.0 g/L CeO2 and 24.4 g/L ThO2, respectively. Furthermore, a solvent extraction process to selectively extract and recover cerium and thorium from bastnaesite leaching was proposed, by which the purities of cerium and thorium products reached 97.2% and 96.5% with a yield of 85.4% and 98.8%, respectively.
研究领域:
湿法冶金
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稀土元素化学
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溶剂萃取
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分离科学
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无机化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Yan Li,Ying Dai,Wei Dai,Feiqiang He,Zhuyao Li,Xing Zhong,Qinqin Tao
Uranium and thorium of symbiotic relationship commonly appear in one kind of raw or spent ore. The simultaneous enrichment toward both metals in the first step is essential during many hydrometallurgy processing. Therefore bifunctional solid-state ionic liquid supported amidoxime chitosan (ACS) adsorbents were developed to simultaneously adsorb the two metal from the aqueous solution. The adsorption capacity of the bifunctional adsorbents toward uranium and thorium were significantly superior to the ionic liquid-free amidoxime chitosan, obviously proving the synergistic effect. For both uranium and thorium, the adsorption capacity in the consequence of ACS-[N 4444 ][DEHP], ACS-[N 4444 ][EHEHP], ACS-[N 1888 ][DEHP] and ACS-[N 1888 ][EHEHP] prove the steric effect and P O bonding played important roles in the adsorption. Study on isotherms and kinetics demonstrated the adsorption of ionic liquid-ACS adopted monolayer and chemical way. The Δ G o of very small negative values highlighted ionic liquid-ACS were prone to adsorb uranium and thorium. The study showed feasibility of bifunctional solid-state ionic liquid supported amidoxime chitosan adsorbents for Th(IV) and U(VI).
研究领域:
化学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yasir Hamid,Lei Liu,Muhammad Haris,Muhammad Usman,Qiang Lin,Yonglong Chen,Muhammad Saqib Rashid,Zaid Ulhassan,M. Iftikhar Hussain,Xiaoe Yang
This study followed the one-step and two-step technologies to produce rice straw biochar (BC), chitosan-modified rice straw biochar (CT-BC), and thiol grafted chitosan-modified biochar (TH@CT-BC) for cadmium (Cd) removal from contaminated water . Here, chitosan and thiol were introduced by two-step combination to enhance the adsorption ability of biochar. Our results revealed the maximum Cd adsorption at pH 5.5 with TH@CT-BC (261.47 mg g −1 ) followed by CT-BC (103.14 mg g −1 ) and BC (29.64 mg g −1 ). Obtained data was best fitted by the Langmuir and pseudo-second-order kinetic models (with R 2 values of 0.997 for TH@CT-BC) as compared to Freundlich and Temkin models (0.949 and 0.925, respectively). TH@CT-BC retained its efficiency in spiked river water system, removing up to 89% of Cd in river water spiked with 30 mg −1 L Cd. The experimental investigations and data calculations demonstrated the surface complexation and electrostatic interaction as dominant underlying mechanisms for Cd removal by TH@CT-BC. Moreover, it is essential to utilize the large amount of produced rice straw to develop new materials which would help in converting the waste to useable product for environmental remediation. Thus, this study demonstrates the production of TH@CT-BC from rice straw as an effective adsorbent of Cd from aqueous systems which can be studied as a potential candidate for practical wastewater treatment applications.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Dingzhong Yuan,Shiao Zhang,Jiale Tan,Yahong Dai,Yun Wang,Yan He,Yan Liu,Xiaohong Zhao,Mengmeng Zhang,Qinghua Zhang
It is challenging to extract Th (IV) and U (VI) from rare earth elements (REEs) in concentrated acidic solution. Herein, a nanoporous polymer adsorbent P (DVB-VPA) bearing phosphonic acid groups has been synthesized by solvothermal copolymerization of divinylbenzene (DVB) and vinylphosphonic acid (VPA). The maximum adsorption capacity (q max ) for Th (IV) and U (VI) onto P (DVB-VPA) was estimated to be 354.6 and 216.5 mg g −1 at 298 K in 4 mol L −1 of hydrogen nitrate media, which were much larger than most of the adsorbents reported previously. Besides, P (DVB-VPA) exhibited a good selectivity for Th (IV) and U (VI) from REEs in concentrated nitric acid solution, since the values of the selectivity for Th (IV) and U (VI) over La (III), Ce (III), Eu (III), Nd (III) and Sm (III) were 82.2% and 72.5%, respectively. XPS analysis revealed that the adsorption mechanism was achieved through the complexation of P O ligands anchored onto the polymer skeleton of P (DVB-VPA) with thorium and uranium. Due to P (DVB-VPA) showed a larger binding force toward Th (IV) than U (VI), both q max and selectivity for Th (IV) in concentrated hydrogen nitrate media was larger than those for U (VI) on P (DVB-VPA), which has been confirmed by DFT calculations.
研究领域:
核化学
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环境化学
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分离科学
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材料化学
·
放射化学
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DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·
IF 1.6
Huang Xuanhao,Liu Xingyue,Wang Yiting,Wang Zhuang,Yu Qiao,Zhou Hang,Li Rui,Ding Songdong
As one of the main radiolysis products of tri-isoamyl phosphate (TiAP) in the spent fuel reprocessing process, di-isoamyl phosphate (DiAP) can lead to a significant deterioration of TiAP in extraction performance. In this context, the effect of DiAP on the extraction and stripping behaviors of U(VI), Th(IV), and Zr(IV) for 1.1 mol/L TiAP/ n -dodecane organic phase was investigated for the first time. It has been shown that DiAP can increase the ability of TiAP to extract metal ions and inhibit the stripping, as well as promote the formation of interfacial deposition. Combined with the results of DLS, FT-IR, 31 P NMR, ESI-MS and elemental analysis, the role of DiAP in the formation of interfacial deposition was also elucidated.
研究领域:
化学工程
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核能科学与工程
·
放射化学
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DOI
高影响因子
NEURON
·
2024
·
IF 14.7
Bin Wu,Ling Meng,Yan Zhao,Junjie Li,Qiuyun Tian,Yayan Pang,Chunguang Ren,Zhifang Dong
Social creatures must attend to threat signals from conspecifics and respond appropriately, both behaviorally and physiologically. In this work, we show in mice a threat-sensitive immune mechanism that orchestrates psychological processes and is amenable to social modulation. Repeated encounters with socially cued threats triggered meningeal neutrophil (MN) priming preferentially in males. MN activity was correlated with attenuated defensive responses to cues. Canonical neutrophil-specific activation marker CD177 was upregulated after social threat cueing, and its genetic ablation abrogated male behavioral phenotypes. CD177 signals favored meningeal T helper (Th)1-like immune bias, which blunted neural response to threatening stimuli by enhancing intrinsic GABAergic inhibition within the prelimbic cortex via interferon-gamma (IFN-γ). MN signaling was sensitized by negative emotional states and governed by socially dependent androgen release. This male-biased hormone/neutrophil regulatory axis is seemingly conserved in humans. Our findings provide insights into how immune responses influence behavioral threat responses, suggesting a possible neuroimmune basis of emotional regulation.
研究领域:
神经科学
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免疫学
·
行为科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）