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Efficient and selective extraction of uranium from seawater based on a novel pulsed liquid chromatography radionuclide separation method

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Nuclear Science and Techniques 2023年第2期34卷 13-27页

作者： jian‑Hua ye Tao Yu State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices East China University of TechnologyNanchang 330013China School of Nuclear Science and Engineering East China University of TechnologyNanchang 330013China

The novel pulsed liquid chromatography radionuclide separation method presented here provides a new and promising strategy for the extraction of uranium from *** this study,a new chromatographic separation method was proposed,and a pulsed nuclide automated separation device was developed,alongside a new chromatographic *** length of this chromatographic column was 10 m,with an internal warp of 3 mm and a packing size of 1 mm,while the total separation units of the column reached 12,*** most favorable conditions for the separation of nuclides were then obtained through optimizing the separation conditions of the device:Sample pH in the column=2,sample injection flow rate=5.698 mL/min,chromatographic column heating temperature=60℃.Separation experiments were also carried out for uranium,europium,and sodium ions in mixed solutions;uranium and sodium ions in water samples from the Ganjiang River;and uranium,sodium,and magnesium ions from seawater *** separation factors between the different nuclei were then calculated based on the experimental data,and a formula for the separation level was *** experimental results showed that the separation factor in the mixed solution of uranium and europium(1:1)was 1.088,while achieving the initial separation of uranium and europium theoretically required a 47-stage *** the separation factor of 1.50for the uranium and sodium ions in water samples from the Ganjiang River,achieving the initial separation of uranium and sodium ions would have theoretically required at least a 21-stage ***,for the seawater sample separation experiments,the separation factor of uranium and sodium ions was 1.2885;therefore,more than 28 stages of sample separation would be required to achieve uranium extraction from *** novel pulsed liquid chromatography method proposed in this study was innovative in terms of uranium separation and enrichment,while expanding the possibilities

关键词： Pulsed liquid chromatography Nuclide separation Seawater uranium extraction Uranium enrichment

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Phase Angle Control Based Three-phase DVR with Power Factor Correction at Point of Common Coupling

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Journal of Modern Power Systems and Clean Energy 2020年第1期8卷 179-186页

作者： jian ye Hoay Beng Gooi Nanyang Technological University 50 Nanyang Avenue639798Singapore

This paper investigates the ability of correcting the power factor at the point of common coupling(PCC)of the source side using dynamic voltage restorer(DVR).By applying the phase angle control(PAC)method,the DVR compensating voltage will be injected with a specific phase angle and magnitude in series with the transmission line,which leads to a power factor angle shift of the resultant load *** a result,the source voltage is always in phase with the source current under different load conditions,which means that the power factor correction is achieved at the PCC of the source side.A laboratorial prototype of the DVR is utilized to verify the proposed control *** experimental results validate that an approximate unity power factor can be maintained at the source side.

关键词： Dynamic voltage restorer(DVR) voltage sag and swell compensation phase angle control(PAC)method power factor correction

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Mesoscopic analysis of the utilization of hardening model for a description of softening behavior based on disturbed state concept theory

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第9期9卷 1167-1175页

作者： jian-ye ZHENG An-li WU Guangzhou Metropolis Construction Commission Guangzhou 510030 China College of Civil Engineering and Architecture lnner Mongolia University of Technology Hohhot 010051 China

Mesoscopic characteristics of a clayey soil specimen subjected to macroscopic loading are examined using a medi- cal-use computerized tomography (CT) instrument. Disturbed state concept (DSC) theory is based on the utilization of the hard- ening model. DSC indirectly describes material behavior by claiming that the actual response of the material is expressed in terms of the relative intact (RI) response and the fully adjusted (FA) response. The occurrence of mesoscopic structural changes of material has similarities with the occurrence of a macroscopic response of the material under loadings. In general, the relative changing value of a softening material is three to five times more than that of a hardening material. Whether special zones exist or not in a specimen cross section does not affect the following conclusion: hardening material and softening material show me- chanical differences with CT statistical indices values prominently changing, and the change is related to the superposing of a disturbance factor. A new disturbance factor evolution function is proposed. Thus, mesoscopic statistical indices are introduced to describe macroscopic behavior through the new evolution function. An application of the new evolution function proves the effectiveness of the amalgamation of a macroscopic and a mesoscopic experimental phenomenon measurement methods.

关键词： Constitutive model Disturbed state concept (DSC) Computerized tomography (CT) Softening

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Finding a Probe for Extracting Information on the Momentum Dependent-Interaction in Heavy Ion Collisions

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Chinese Physics Letters 2010年第6期27卷 70-73页

作者： LIU jian-ye GUO Wen-Jun College of Mathematics-Physics and Information Tianshui Normal University Tianshui 741001 Institute of Modern Physics Chinese Academy of Sciences PO Box 31 Lanzhou 730000 Science College University of Shanghai for Science and Technology Shanghai 200093 Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator Lanzhou 730000

The effect of momentum-dependent interaction on the kinetic energy spectrum of the neutron-proton ratio （（n/p）gas）b（ Ek ） for 64Zn ＋64Zn is studied. It is found that （（n/p）gas）b（ Ek ） sensitively depends on the momentumdependent interaction and weakly on the in-medium nucleon-nucleon cross section and symmetry potential. Therefore （（n/p）gas）b（ Ek ） is a possible probe for extracting information on the momentum-dependent interaction in heavy ion collisions.

关键词： DATA mining ANGULAR momentum (Nuclear physics) HEAVY ion collisions STOPPING power (Nuclear physics) NEUTRON-proton interactions SYMMETRY (Physics) CROSS sections (Nuclear physics)

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A new liquid membrane diffusion model for characterizing the adsorption kinetics of europium by using a continuous measurement of adsorption platform

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Nuclear Science and Techniques 2024年第1期35卷 59-72页

作者： Hao-Qi Yu Tao Yu jian-Hua ye State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China CGN Cangnan Nuclear Power Co. Ltd.Cangnan 325800China jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices East China University of TechnologyNanchang 330013China School of Nuclear Science and Engineering East China University of TechnologyNanchang 330013China

To explore the kinetic adsorption under continuous and nonequilibrium states, an integration of continuous measurement and adsorption platform kinetics method was proposed, which was initially called the ICM-AP kinetics method, and a corresponding kinetic adsorption experimental method was developed. Adsorption experiments of europium(Eu) on Ca-bentonite,Na-bentonite, and the D231 cation exchange resin were performed using the ICM-AP kinetics method and continuous measurements. Because the kinetic experimental results observed in this study were different from those of traditional batch adsorption data, pseudo-first-order or pseudo-second-order kinetic models were unsuitable for fitting the experimental ***, a liquid membrane diffusion(LMD) model was developed based on the assumption of simultaneous adsorption/desorption to discuss the mechanism of kinetic adsorption. The kinetic adsorption mechanism was also studied by using *** results indicated that the proposed adsorption model can fit the experimental data more suitably, and the adsorption/desorption behaviors of Eu on bentonite and the D231 resin were simultaneously observed, suggesting that the adsorption kinetics of Eu(Ⅲ) was mainly dominated by hydrated Eu(Ⅲ) ions on the liquid membrane.

关键词： ICM-AP method LMD model Adsorption mechanism Eu(Ⅲ)

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New loop pairing criterion based on interaction and integrity considerations

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第5期11卷 381-393页

作者： Ling-jian ye Zhi-huan SONG Institute of Industrial Process Control Zhejiang University Hangzhou 31002 7 China

Loop pairing is one of the major concerns when designing decentralized control systems for multivariable *** existing pairing tools,such as the relative gain array(RGA) method,have shortcomings both in measuring interaction and in integrity *** evaluate the overall interaction among loops,we propose a statistics-based criterion via enumerating all possible combinations of loop ***,we quantify the traditional concept of integrity to represent the extent of integrity of a decentralized control ***,we propose that a pairing decision should be made by taking both factors into *** examples are provided to illustrate the effectiveness of the proposed criterion.

关键词： Control structure design Decentralized control Interaction analysis Variable pairing Relative gain array

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Influential factors of formation kinetics of flocs produced by water treatment coagulants

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Journal of Environmental Sciences 2013年第5期25卷 1015-1022页

作者： Chunde Wu Lin Wang Bing Hu jian ye College of Environmental Science and Engineering South China University of Technology The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of Ministry of Education The Key Laboratory of Environmental Protection and Eco-Remediation of Guangdong Regular Higher Education Institutions

The growth rate and size of floc formation is of great importance in water treatment especially in coagulation *** floc formation kinetics and the coagulation efficiency of synthetic water were investigated by using an on-line continuous optical photometric dispersion analyze and the analysis of water *** conditions such as alum dosage,pH value for coagulation,stirring intensity and initial turbidity were extensively *** photometric dispersion analyze results showed that coagulation of kaolin suspensions with two coagulants（alum and polyaluminium chloride） could be taken as a two-phase process：slow and rapid growth *** conditions with higher coagulant doses,appropriate pH and average shear rate might be particularly *** rate of overall floc growth was mainly determined by a combination of hydraulic and water quality conditions such as pH and *** measurement of zeta potential indicates that polyaluminium chloride exhibited higher charge-neutralizing ability than alum and achieved lower turbidities than alum for equivalent Al *** the same operating conditions,the alum showed a higher grow rate,but with smaller floc size.

关键词： floc flocculation index growth rate kinetics

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THEORETICAL ANALYSIS ON THE NUCLEATION OF MICRO-DAMAGE IN CEMENT MORTAR UNDER COMPRESSIVE LOADING AND SULFATE ATTACK

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Acta Mechanica Solida Sinica 2013年第1期26卷 53-61页

作者： jiankang Chen Hui Song Minghua Zhang jian ye The Faculty of Mechanical Engineering and Mechanics Ningbo University State Key Laboratory of Turbulence and Complex Systems jiangsu Provincial Water Resources Department

Effect of uniaxial compression on the nucleation of micro-damage in cement mortar under sulfate attack is investigated. Shape and size of micro-voids in cement mortar is detected using Micro Computed Tomography techniques. The formation of delayed ettringite crystal is analyzed using scanning electron microscope and energy disperse spectrum methods. Deformation of micro-voids and the distribution of stress at the surface of a micro-void are calculated. It is found that the nucleation of micro-cracks is caused by the tensile stress at the voids＇ surface, and such damage nucleation will be speeded up by the remote uniaxial compressive load.

关键词： sulfate attack uniaxial compression micro-damage cement mortar Eshelby'smethod

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Hospitalized eye injury in a Chinese urban population:a 7-year retrospective analysis

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International Journal of Ophthalmology(English edition) 2010年第2期3卷 179-181页

作者： Min Wu jian ye Department of Ophthalmology Daping Hospital the Third Military Medical University Chongqing 400042 China

AIMTo present the epidemiology, cause of injury, ocular status and final visual acuity after management of severe ocular trauma required hospitalization during 7 years in a representative urban Chinese population.

关键词： eye injury Chinese

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Effects of Atomic Mixing in Inertial Confinement Fusion by Multifluid Interpenetration Mix Model

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Communications in Theoretical Physics 2009年第12期52卷 1102-1106页

作者： GU jian-Fa ye Wen-Hua Institute of Applied Physics and Computational Mathematics Beijing 100094 China

The effects of atomic-level rnixing are systemically investigated in a multifluid interpenetration mix model ,and results are compared with the single-fluid model＇s simulations and experimental data. It is shown that increasing the model free parameter α, shock Mach number, and the initial density discontinuity makes the mix length and fraction of mixing particle increase, resulting in the lower shock temperatures compared with the results of single-fluid model without mixing. Recent high-compressibility direct-drive spherical implosions on OMEGA are simulated by the interpenetration mix modal. The calculations with atomic mixing between fuel and shell match quite well with the observations. Without considering any mixing, the calculated neutron yields and ion temperatures are overpredicted; while inclusion of the interpenetration mix model with the adjustable parameter α could fit the simulated neutron yields and ion temperatures well with experimental data.

关键词： multifluid interpenetration mix model atomic mixing inertial confinement fusion

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