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Mesoporous silica SBA-15 functionalized with phosphonate and amino groups for uranium uptake

Science china Chemistry 2012年第9期55卷 1705-1711页

作者： WANG XiaoLiang YUANLiYong WANG YanFei LI ZiJie LIU YaLan FENG YiXiao ZHAO YuLiang chai ZhiFang SHI WeiQun Department of Applied Chemistry School of Chemistry and Chemical EngineeringUniversity of South ChinaHengyang 421001China key laboratory of nuclear {3. techniques Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China key laboratory for Biomedical Effects of Nanomaterials&Nanosafety institute of {3. energy Physics Chinese Academy of SciencesBeijing 100049China

Mesoporous silicas have a very attractive ability of sorption and enrichment of metal ions due to their huge surface area and facile functionalization by organic ligands. In this work, phosphonate-amino hifunctionalized mesoporous silica SBA-15 （PA-SBA-15） as U（VI） sorbent was fabricated through post-grafting method. The obtained mesoporous silica was character- ized by SEM, XRD, NMR and nitrogen sorption/desorption experiments, which revealed the existence of ordered mesoporous structure with uniform pore diameter and large surface area. The adsorptivity of PA-SBA-15 for U（VI） from aqueous solution was investigated using batch sorption technique under different experimental conditions. The preliminary results show that the U（VI） sorption by PA-SBA-15 is very quick with equilibrium time of less than 1 h, and the U（VI） uptake is as large as 3.3.mg/g at pH 5.5 under 95℃. The sorption isotherm has been successfully modeled by the Langmuir isotherm, suggesting a monolayer homogeneous sorption of U（VI） in PA-SBA-15. The sorption is pH-dependent due to the pH-dependent charge of sorbent in the aqueous solution. The thermodynamics research shows that the sorption is a feasible and endothermic process. Based on these results, PA-SBA-15 could be a promising solid phase sorbent for highly-efficient removal of U（VI） ions from waste water and enrichment of U（VI） from a solution at a very low level.

关键词： mesoporous silica SBA-15 phosphonate amino group bifunctionalized sorption uranium

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Microscopic study of higher-order deformation effects on the ground states of superheavy nuclei around^(270)Hs

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chinese Physics C 2022年第2期46卷 140-148页

作者： Xiao-Qian Wang Xiang-Xiang Sun shan-Gui Zhou CAS key laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of ScienceBeijing 100190China School of Physical sciences University of Chinese Academy of SciencesBeijing 100049China School of nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

We investigate the effects of higher-order deformations β_(λ)(λ=4,6,8,and 10)on the ground state prop-erties of superheavy nuclei(SHN)near the doubly magic deformed nucleus ^(270)Hs using the multidimensionally-con-strained relativistic mean-field(MDC-RMF)model with five effective interactions:PC-PK1,PK1,NL3.(+),DD-ME2,and *** doubly magic properties of ^(270)Hs include large energy gaps at N=162 and Z=108 in the single-particle *** investigating the binding energies and single-particle levels of ^(270)Hs in the multidimensional de-formation space,we find that,among these higher-order deformations,the deformationβ6 has the greatest impact onthe binding energy and influences the shell gaps *** conclusions hold for other SHN near ^(270)*** calculations demonstrate that the deformation β_(6) must be considered when studying SHN using MDC-RMF.

关键词： density functional theory superheavy nuclei deformation effects

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A primary study on biological behavior of aluminum using^26Al-AMS

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nuclear Science and techniques 2016年第3期27卷 25-30页

作者： Song-Mei Qin Xiang-Gao Wang Xiao-Xi Lan Yun-Ting Gu Ke-Jun Dong Ming He shan Jiang Guangxi University of chinese Medicine Nanning 530001China GXU-NAOC Center for Astrophysics and Space sciences Department of PhysicsGuangxi UniversityNanning 530004China Guangxi key laboratory for the Relativistic Astrophysics Nanning 530004China china institute of Atomic energy Beijing 102413China

Aluminum is concerned as a possible cause of many *** investigate the long-term A1 biokinetics and bioavailability in various kinds of Al-contained medicine and food,an accelerator mass spectrometry(AMS)based on the HI-13.tandem has been established for biological analysis with ^(26)A1(T_(1/2) = 716,000 years) as the *** this paper,the animal tracing,sample preparation procedure and ^(26)A1-AMS measurement are *** sample preparation procedure has been simplified.A high sensitivity of 5×10^(-15) for ^(26)A1/^(27)A1 has been *** phases were found before and after a break time(t_b)for the ^(26)A1 retained in blood and brain,with t_b≈8 and12 h after the ^(26)Al tracer injection,respectively.

关键词： AMS 生物学特性铝制备过程生物利用度生物动力学加速器质谱生物分析

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不同亚型库欣综合征患者脑功能变化的差异

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中华医学杂志 2019年第8期99卷 593-598页

作者：刘丹丹周薇李盼龙张京玲陈薇谷伟军裴育杜锦臧丽巴建明吕朝晖母义明单保慈张云良马林窦京涛解放军总医院内分泌科全军内分泌代谢重点实验室北京100853 解放军总医院放射诊断科北京100853 中国科学院高能物理研究所核技术应用研究中心北京100049 南开大学医学院药理学教研室天津300071 保定市第一中心医院内分泌科保定071000

摘要目的比较不同亚型库欣综合征(CS)患者脑功能变化的差异。方法纳入2015年9月至2017年3.在解放军总医院内分泌科住院诊断为促肾上腺皮质激素(ACTH)依赖性CS患者11例,ACTH非依赖性CS患者29例,对受试者进行精神神经症状量表评估和脑任... 详细信息

摘要目的比较不同亚型库欣综合征(CS)患者脑功能变化的差异。方法纳入2015年9月至2017年3.在解放军总医院内分泌科住院诊断为促肾上腺皮质激素(ACTH)依赖性CS患者11例,ACTH非依赖性CS患者29例,对受试者进行精神神经症状量表评估和脑任务态功能磁共振成像(fMRI)检查。结果共40例患者纳入分析,女3.例,男6例,就诊年龄(3..20±12.10)岁,受教育程度12(9,16)年。ACTH依赖性CS患者抑郁评分较ACTH非依赖性CS患者高[(64.6±6.1)分比(56.2±12.8)分,P=0.008],正性情绪评分[(17.8±4.2)分比(24.3.7.2)分,P=0.008]和库欣生活质量评分[3.(29,3.)分比42(29,51)分,P=0.040]较低。与ACTH非依赖性CS患者相比,观看正性图片时ACTH依赖性CS患者左侧颞上回激活程度较强,双侧背侧前扣带回、双侧额上回和左侧额中回激活程度减弱;观看负性图片时,ACTH依赖性CS患者在双侧小脑、左侧额上回、左侧额中回、左侧楔前叶和右侧中央后回激活减弱(均P1,AlphaSim校正)。不同亚型CS组患者脑功能有差异的部分脑区的激活程度与皮质醇、ACTH、24 h尿游离皮质醇(UFC)水平及抑郁、负性情绪评分相关(均P<0.05)。结论ACTH依赖性CS患者比ACTH非依赖性CS患者的脑功能损伤程度大,抑郁状态严重,其生活质量更差。

关键词：库欣综合征脑磁共振成像精神障碍

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Prediction of proton-induced SEE error rates for the VATA160 ASIC

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nuclear Science and techniques 2017年第1期28卷 88-93页

作者： Kai Xi Di Jiang shan-shan Gao Jie Kong Hong-Yun Zhao Hai-Bo Yang Tian-Qi Liu Bin Wang Bing Ye Jie Liu institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 China University of chinese academy of sciences Beijing 100049China State key laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026 China

We predict proton single event effect(SEE)error rates for the VATA160 ASIC chip on the Dark Matter Particle Explorer(DAMPE) to evaluate its radiation *** proton test facilities,we built a Monte Carlo simulation tool named PRESTAGE to calculate the proton SEE *** is based on the particle transport toolkit *** adopts a location-dependent strategy to derive the SEE sensitivity of the device from heavy-ion test data,which have been measured at the HI-13.tandem accelerator of the china institute of Atomic energy and the heavy-ion research facility in *** AP-8,SOLPRO,and August 1972 worst-case models are used to predict the average and peak proton fluxes on the DAMPE *** results show that the averaged proton SEE error rate for the VATA160 chip is approximately 2.17×10^(-5)/device/***-case error rates for the Van Allen belts and solar energetic particle events are 1-3.orders of magnitude {3.er than the averaged error rate.

关键词： Proton ASIC Single event effects Error rates

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Reevaluation of thermonuclear reaction rate of ^(50)Fe(p,γ)^(51)Co

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chinese Physics C 2016年第12期40卷 113-119页

作者： Li-Ping Zhang Jian-Jun He Wan-Dong chai Su-Qing Hou Li-Yong Zhang College of Physics and Electronic Information Engineering Chifeng University Chifeng 024000 China key laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China institute of Modern Physics Chinese Academy of Sciences

The thermonuclear rate of the 50Fe（p, γ）51Co reaction in the Type I X-ray bursts （XRBs） temperature range has been reevaluated based on a recent precise mass measurement at CSRe Lanzhou, where the proton separa- tion energy Sp=142±77 keV has been determined firstly for the ~1Co nucleus. Comparing to the previous theoretical predictions, the experimental Sp value has much smaller uncertainty. Based on the nuclear shell model and mirror nuclear structure information, we have calculated two sets of thermonuclear rates for the 50Fe（p, γ）51Coreaction by utilizing the experimental Sp value. It shows that the statistical-model calculations are not ideally applicable for this reaction primarily because of the low density of low-lying excited states in 51Co. In this work, we recommend that a set of new reaction rates based on the mirror structure of 51Cr should be incorporated in future astrophysical network calculations.

关键词： X-ray burst (XRB) nucleosynthesis mass measurement proton separation energy reaction rate

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Elastic scattering of ^(13.C and ^(14)C isotopes on a ^(208)Pb target at energies of approximately five times the Coulomb barriers

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chinese Physics C 2024年第3期48卷 65-71页

作者：杨过段芳芳王康杨彦云孙志宇 Valdir Guimarães 庞丹阳陈文棣金磊许世伟马军兵马朋白真汪凌昊刘泉王惠仁吕冰锋郭松 Mukhi Kumar Raju 王秀华李荣华张玉虎周小红胡正国徐瑚珊 CAS key laboratory of high Precision {3. Spectroscopy Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China School of nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100080China Instituto de Física Universidade de São PauloRua do Matão1371São Paulo 05508-090SPBrazil School of Physics and beijing key laboratory of Advanced {3. Materials and Physics Beihang UniversityBeijing 100191China School of Physics Science and Engineering Tongji UniversityShanghai 200092China School of physics and Optoelectronic Engineering Anhui UniversityHefei 230601China Department of Physics GITAM School of ScienceGITAM UniversityVisakhapatnam 530045India

The elastic scattering angular distributions of ^(13.C at 3.0 MeV and ^(14)C at 294 MeV and 3.2 MeV on a ^(208)Pb target,which correspond to approximately five times the Coulomb barriers,were measured at the Radioactive Ion Beam Line in *** data were analyzed within the optical model and continuum-discretized coupled-channels(CDCC)framework,and the results of both calculations could effectively account for the experimental *** differential cross sections of elastic scattering revealed no particular suppression at the Coulomb nuclear interference peak angles,suggesting that the breakup coupling effects on the elastic scattering angular distributions were negligibly small in this incident energy *** contributions from the couplings with inelastic states to the elastic cross sections were of minor importance within the angular range covered by these experiments.

关键词： elastic scattering radioactive ion beam angular distribution optical model coupling effects

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Efficacious selective separation of U(Ⅵ) over Mo(Ⅵ) using novel 2,9-diamide-1,10-phenanthroline ligands: Liquid-liquid extraction and coordination chemistry

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chinese Chemical Letters 2023年第11期34卷 163-168页

作者： Taoyuan Xiu Simei Zhang Peng Ren Siyan Liu Shuai Wang Hamza Shehzad Jingyang Wang Meng Zhang Guoan Ye Caishan Jiao Qunyan Wu Liyong Yuan Zhifang chai Weiqun Shi College of nuclear Science and Technology Harbin Engineering UniversityHarbin 150001China laboratory of nuclear energy Chemistry Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China china institute of Atomic energy Beijing 102413China State key laboratory of nuclear Resources and Environment School of Nuclear Science and TechnologyEast China University of TechnologyNanchang 330013China School of Chemistry University of the PunjabLahore 54590Pakistan

Uranium and molybdenum are important strategic elements. The production of ^(99)Mo and the hydrometallurgical process of uranium ore face difficult problems of separation of uranium and *** this study, the four phenanthroline diamide ligands were synthesized, and extraction and stripping experiments were performed under different conditions to evaluate the potential application of these ligands for separation of U(Ⅵ) over Mo(Ⅵ). With the growth of alkyl chain, the solubility of ligands could be greatly improved, and the separation effect of U(Ⅵ) over Mo(Ⅵ) gradually increased. The SF_(U/Mo) were around 10,000 at 4 mol/L HNO3. Three stripping agents were tested with the stripping efficiency of Na_(2)CO_(3.(5%) > H_(2)O > HNO_(3.(0.01 mol/L). The stripping percentages of the three stripping agents were all close to unity, indicating that the ligands had the potential to be recycled. The chemical stoichiometry of U(Ⅵ) complexes with ligands was evaluated as 1:1 using electrospray ionization mass spectrometry,ultraviolet visible spectroscopy and single-crystal X-ray diffraction. The consistency between theoretical calculation and experimental results further explains the coordination mechanism.

关键词： Phenanthroline diamide ligand Uranium Molybdenum Solvent extraction Coordination chemistry

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白洋淀沟壕系统水陆交错区生物质磷形态特征研究

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环境科学学报 2021年第5期41卷 1960-1969页

作者：王卓李思敏张文强单保庆河北工程大学能源与环境工程学院邯郸056038 中国科学院生态环境研究中心环境水质学国家重点实验室北京100085

利用液相3.P核磁共振的分析方法,研究了白洋淀水陆交错区中生物质磷(Biogenic-P)的形态特征.结果表明:不同类型水陆交错区磷含量差异较大,水陆交错区中间土壤总磷(TP)含量最高,为13.2.81~2444.90 mg·kg^(-1);水陆交错区Biogenic-P含量... 详细信息

利用液相3.P核磁共振的分析方法,研究了白洋淀水陆交错区中生物质磷(Biogenic-P)的形态特征.结果表明:不同类型水陆交错区磷含量差异较大,水陆交错区中间土壤总磷(TP)含量最高,为13.2.81~2444.90 mg·kg^(-1);水陆交错区Biogenic-P含量为43..65~13.9.20 mg·kg^(-1),占TP含量的25.62%~60.26%;使用液相3.P-NMR技术共检测到7类磷化合物,其中,Biogenic-P共计检测到6种,包括磷酸单酯(Mono-P)、DNA磷(DNA-P)、焦磷酸盐(Pyro-P)、磷脂(Lipids-P)、多聚磷酸盐(Poly-P)和膦酸盐(Phon-P);水陆交错区Biogenic-P以Mono-P为主,含量为3.2.94~1086.96 mg·kg^(-1),TP含量平均值是全国土壤磷含量平均值的3.41倍;水陆交错区界面土壤与中间土壤相较沉积物和边缘土壤Biogenic-P含量更高;从水陆交错区的中间土壤到沉积物,Biogenic-P含量变化趋势与总有机质(OM)含量变化趋势相反.基于液相3.P核磁共振技术,本文对白洋淀沟壕系统水陆交错区中Biogenic-P形态特征与分布提出了新的认识,有助于深入理解水陆交错区磷的生物地球化学循环过程,为流域磷输入的控制提供理论支撑.

关键词：白洋淀水陆交错区生物质磷 3.P-NMR

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锕系氮化物燃料性质的第一性原理模拟研究进展

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中国科学：化学 2017年第1期47卷 92-99页

作者：张玉娟周张健蓝建慧柴之芳石伟群北京科技大学材料科学与工程学院北京100083 中国科学院高能物理研究所核能放射化学实验室北京100049

锕系氮化物作为未来先进核能系统中的重要候选核燃料近年来备受科学界关注.由于锕系元素具有放射性和化学毒性,在实验上开展锕系元素相关的研究工作通常受到诸多条件限制,因此,对锕系氮化物的结构和性能作出前瞻性的理论预测具有重要意... 详细信息

锕系氮化物作为未来先进核能系统中的重要候选核燃料近年来备受科学界关注.由于锕系元素具有放射性和化学毒性,在实验上开展锕系元素相关的研究工作通常受到诸多条件限制,因此,对锕系氮化物的结构和性能作出前瞻性的理论预测具有重要意义.本文在分析和归纳大量文献的基础上,结合本实验室在锕系氮化物第一性原理计算方面的研究结果,从以下4个方面总结了当前国内外在锕系氮化物理论研究方面的工作进展:理论模拟方法发展、基态电子性质、相变和结构缺陷形成及扩散行为,以期为氮化物燃料的实验研究和应用提供理论参考.另外,本文还归纳了当前锕系氮化物研究中亟需解决的科学问题.

关键词：锕系氮化物缺陷裂变产物第一性原理

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