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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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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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Retroperitoneal Versus Transperitoneal Laparoscopic Partial Nephrectomy: A Systematic Review and Meta-analysis

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Chinese Medical Sciences Journal 2015年第4期30卷 239-244页

作者： Jing Fu Shan ye hua-jian ye Department of Urology Shaoxing Branch the First Affiliated Hospital of Zhejiang University School of Medicine (Shaoxing Second Hospital) Department of Public Health Tashan Community Health Service Center

Objective To review published literatures comparing the safety and effectiveness of retroperitoneal laparoscopic partial nephrectomy(RLPN) with transperitoneal laparoscopic partial nephrectomy(TLPN) and provide reference for clinical work. Methods The search strategy was performed to identify relevant papers from the Cochrane Central Register of Controlled Trials, EMBASE, MEDLINE, Google Scholar, China Hospital Knowledge Database, Wangfang Chinese Periodical Database, and VIP Chinese Periodical Database. All papers comparing RLPN with TLPN were included from 2000 to 2015. Two to three reviewers independently screened, evaluated, and extracted the included papers. A Meta-analysis was executed by using Review Manager 5.3 software. The interesting outcomes were tumor size, operating time, estimated blood loss, warm ischaemia time, length of hospital stay, positive margin rate, open conversion rate, overall complication rate, and recurrence rate. Results The literature search obtained 378 papers, then 10 of them were ultimately met the inclusion criteria and included in the systematic review. Finally, 6 of the 10 papers were included in the Meta-analysis. RLPN had significantly less operating time [P = 0.01, mean difference(MD)=-33.68, 95% confidence interval(CI) within(-60.35,-7.01)] and shorter length of hospital stay [P < 0.0001, MD=-1.47, 95% CI within(-2.18,-0.76)] than TLPN. Significant differences were not found between RLPN and TLPN in other outcomes. Conclusions RLPN may be equally safe and be faster than TLPN. Each center can choose a modality according to your own operating habits and experience.

关键词： retroperitoneal transperitoneal laparoscopy partial nephrectomy systematic review

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Hydrogen storage properties of Li-Mg-N-B-H/ZrCoH_(3) composite with different ball-milling atmospheres

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Rare Metals 2023年第3期42卷 1036-1042页

作者： Zhi-Nian Li Hao-Chen Qiu Xiu-Mei Guo jian-hua ye Shu-Mao Wang Li-Jun jiang Jun Du Fermin Cuevas Department of Energy Materials and Technology General Research Institute for Nonferrous MetalsBeijing 100088China UMR7182 CMTR/ICMPE/CNRS-UPEC94320 Thiais CedexFrance

Li-Mg-N-B-H/ZrCoH_(3) composites were successfully synthesized by ball milling of the reactants under argon and hydrogen atmosphere,*** composite synthesized by reactive ball milling(RBM)under hydrogen has the best hydrogen storage *** can desorb 3.71 wt%hydrogen in 60 min at 150℃under pressure of 0.1 MPa,and the dehydrogenation capacity reaches 4.59 wt%in 8 *** the re-hydrogenation,5.27 wt%hydrogen was absorbed in only 10 min at 150℃under H_(2) pressure of 8 *** phases of the as-milled and subsequently dehydrogenated and re-hydrogenated samples were determined by X-ray diffraction(XRD).The microstructures and elemental distributions were characterized by scanning electron microscope(SEM)and energy-dispersive spectrometer(EDS)*** is shown that Mg is in situ hydrogenated and introduced homogeneous distribution of ZrCoH_(3) particles during the RBM process under hydrogen *** activation energies for the composites were calculated by Kissinger method through differential scanning calorimetric(DSC)measurements for the dehydrogenation process with different heating *** is determined that the activation energy for the Li-Mg-N-B-H/ZrCoH_(3) composite synthesized by RBM under hydrogen is 79.9 kJ·mol^(-1),which is14 kJ·mol^(-1) lower than that for the sample without ZrCoH_(3) *** N-H bond energies were analyzed by infrared(IR)absorption spectrum,and the reasons for weakening of the N-H bond were further discussed.

关键词： Hydrogen storage Li-Mg-N-B-H Reactive ball milling Activation energy

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Structural characteristics and mechanism of hydrogen-induced disproportionation of the ZrCo alloy

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International Journal of Minerals,Metallurgy and Materials 2012年第11期19卷 1010-1015页

作者： Xiu-mei Guo Shu-mao Wang Xiao-peng Liu Zhi-nian Li jian-hua ye Hui-ping Yuan Li-jun jiang Energy Material and Technology Institute General Research Institute for Nonferrous Metals Beijing 100088 China

The intermetallic compound ZrCo was prepared, and its hydrogen-induced disproportionation in hydrogen desorption processes was investigated. The hydrogenation-dehydrogenation thermodynamics of the ZrCo alloy was evaluated by pressure-composition isotherm measurements at different temperatures. The kinetic processes of hydrogen-induced disproportionation at different temperatures under certain pressures were detailedly studied. The disproportionation rate of the ZrCo alloy increased with the increases of temperature and initial hy- drogen pressure under experimental conditions. However, the maximum attainable extent of disproportionation did not change much with an increase in temperature or initial hydrogen pressure. The crystallographic structure analysis of the ZrCo alloy combining with its corre- sponding dehydrogenation kinetic curves under the conditions of an initial hydrogen pressure of 0.2 MPa and a temperature of 723 K indi- cated that the basic process of disproportionation reactions was composed of four stages： rapid dehydrogenation of ZrCoH3, equilibrium of dehydrogenation, simultaneity of dehydrogenation and disproportionation, and completion of disproportionation.

关键词： zirconium compounds cobalt compounds hydrogenation dehydrogenation structural analysis thermodynamics

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China top brand strategy and innovation

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Chinese Business Review 2007年第5期6卷 37-41,65页

作者： ZHAO jian-hua LI Yan ye jian LIU Yi School of Economics and Management China Three Gorges University Yichang 443002 China

The Chinese economy appears the double-restraint characteristic at present stage including mainly resources restraint and market restraint. With the policy of reform and opening up, and especially after accelerating the two fundamental changes put forward by central government, the transformation of the economic growth mode achieved positive progress in China. There was still no brand from China mainland belonging to the 100 top world valuable brands according to Business Weekly of America in 2006. By 2007, a total of 1957 China top brand, 10 world famous China top brand are awarded in china to form a powerful enterprise group. But how to assess a brand is still troublesome. This paper shows the evolution of the policy and discusses the dilemma expecting the advice from the domestic and abroad.

关键词： China top brand strategy innovation

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Ab initio Studies on the Reaction of M++CH4→M+CH2+H2（M＝Sc,Y,La）

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Chemical Research in Chinese Universities 1996年第4期 368-373页

作者： ZHU Rong-shun DAI Shushan huaNG jian-hua and ye Song(Department of Chemistry,Yunnan University,Kunming,650091)

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关键词： s:Ab initio calculation Transition metalion Methane Reaction mechaNism

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Sparse Planar Retrodirective Antenna Array Using Improved Adaptive Genetic Algorithm

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Journal of Electronic Science and Technology 2011年第3期9卷 265-269页

作者： Feng-Ge Hu jian-hua Zhang Li-ye Fang ElectronicEngineering Institute Hefei 230037 China

An improved adaptive genetic algorithm is presented in this paper. It primarily includes two modified methods： one is novel adaptive probabilities of crossover and mutation, the other is truncated selection approach. This algorithm has been validated to be superior to the simple genetic algorithm （SGA） by a complicated binary testing function. Then the proposed algorithm is applied to optimizing the planar retrodirective array to reduce the cost of the hardware. The fitness function is discussed in the optimization example. After optimization, the sparse planar retrodirective antenna array keeps excellent retrodirectivity, while the array architecture has been simplified by 34%. The optimized antenna array can replace uniform full array effectively. Results show that this work will gain more engineering benefits in practice.

关键词： Index Terms Adaptive genetic algorithm phase conjugation retrodirective antenna array sparse array.

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Prussian Blue Analogue‑Templated Nanocomposites for Alkali‑Ion Batteries:Progress and Perspective

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Nano-Micro Letters 2025年第1期17卷 216-261页

作者： jian‑En Zhou Yilin Li Xiaoming Lin Jiaye ye Key Laboratory of Theoretical Chemistry of Environment Ministry of EducationSchool of ChemistrySouth China Normal UniversityGuangzhou 510006People’s Republic of China School of Chemistry and Physics Faculty of ScienceQueensland University of Technology2 George StreetBrisbaneQLD 4000Australia Centre for Materials Science Queensland University of Technology2 George StreetBrisbaneQLD 4000Australia

Lithium-ion batteries(LIBs)have dominated the portable electronic and electrochemical energy markets since their commercialisation,whose high cost and lithium scarcity have prompted the development of other alkali-ion batteries(AIBs)including sodium-ion batteries(SIBs)and potassium-ion batteries(PIBs).Owing to larger ion sizes of Na^(+)and K^(+)compared with Li^(+),nanocomposites with excellent crystallinity orientation and well-developed porosity show unprecedented potential for advanced lithium/sodium/potassium *** enticing open rigid framework structures,Prussian blue analogues(PBAs)remain promising self-sacrificial templates for the preparation of various nanocomposites,whose appeal originates from the well-retained porous structures and exceptional electrochemical activities after thermal *** review focuses on the recent progress of PBA-derived nanocomposites from their fabrication,lithium/sodium/potassium storage mechanism,and applications in AIBs(LIBs,SIBs,and PIBs).To distinguish various PBA derivatives,the working mechanism and applications of PBA-templated metal oxides,metal chalcogenides,metal phosphides,and other nanocomposites are systematically evaluated,facilitating the establishment of a structure–activity correlation for these *** on the fruitful achievements of PBA-derived nanocomposites,perspectives for their future development are envisioned,aiming to narrow down the gap between laboratory study and industrial reality.

关键词： Prussian blue analogues Self-sacrificial template Lithium-ion batteries Sodium-ion batteries Potassium-ion batteries

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存在流水孔的角焊缝移动焊接机器人跟踪

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上海交通大学学报 2016年第12期50卷 1893-1897页

作者：乐健张华叶艳辉郭亮南昌大学江西省机器人与焊接自动化重点实验室南昌330031

为提高焊接的质量和效率,研究了一种能够准确跟踪存在流水孔和焊缝终点的角焊缝机器人。起弧后,利用旋转电弧传感器识别焊枪相对于角焊缝的位置,基于轮、水平滑块和垂直滑块的协调运动跟踪连续的空间弯曲角焊缝;同时,研究了利用视觉传... 详细信息

为提高焊接的质量和效率,研究了一种能够准确跟踪存在流水孔和焊缝终点的角焊缝机器人。起弧后,利用旋转电弧传感器识别焊枪相对于角焊缝的位置,基于轮、水平滑块和垂直滑块的协调运动跟踪连续的空间弯曲角焊缝;同时,研究了利用视觉传感器识别流水孔的起点、终点和焊缝终点的工作原理;研究了基于多传感器融合技术对存在流水孔和焊缝终点的角焊缝的跟踪;并进行了弯曲角焊缝、存在流水孔和焊缝终点的角焊缝的跟踪实验以及焊角形貌观察实验.结果表明,所设计的机器人能够准确地跟踪存在流水孔的角焊缝.

关键词：焊接机器人视觉传感器旋转电弧传感器信息融合焊缝跟踪

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