|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Study on adsorption behavior of cesium using ammonium tungstophosphate(AWP)-calcium alginate microcapsules显示文摘A functional microcapsule was prepared by encapsulating the fine crystalline ammonium tungstophosphate(AWP) in calcium alginate polymer(CaALG).The characterization of AWP-CaALG microcapsule was examined by SEM and EPMA.The adsorption behavior of Cs(I),Rb(I),Sr(II),Pd(II),Ru(III),Rh(III),La(III),Ce(III),Dy(III) and Zr(IV) was investigated by the batch method.The batch experiments were carried out by varying the shaking times,HNO 3 concentration,and initial concentration of metal ions.Relatively large K d values above 10 5 cm 3 /g for Cs(I) were obtained in the range of 0.1-5 M HNO 3,resulting in a separation factor of Cs/Rb exceeding 10 2.In contrast,the K d values of Sr(II),Pd(II),Ru(III),La(III),Dy(III),Ce(III) and Zr(IV) were considerably lower than 50 cm 3 /g.The K d value of Cs(I) decreased in the order of the coexisting ions,H + > Na + >> NH 4 +,and a linear relationship with a slop of about 1 was obtained between log K d and log [NH 4 + ]([NH 4 + ] > 0.01 M).The adsorption of Cs(I) was found to be controlled by chemisorption mechanism,and followed a Langmuir-type adsorption equation.A high uptake percentage of 99.4% for Cs(I) was obtained by using the dissolved solutions of spent fuel from FBR-JOYO(JAEA). | WU Yan MIMURA Hitoshi NIIBORI Yuichi OHNISHI Takashi KOYAMA Shinichi WEI YueZhou | 2012 | Science China Chemistry2012，55，9： | 11 |
| 2 | An advanced partitioning process for key elements separation from high level liquid waste显示文摘To separate MA(Am,Cm) and some fission product elements(FPs) such as Tc,Pd,Cs and Sr from high level liquid waste(HLLW) systematically,we have been studying an advanced aqueous partitioning process,which uses selective adsorption as the separation method.For this process,we prepared several novel adsorbents which were immobilized in a porous silica/polymer composite support(SiO 2-P).Adsorption and separation behavior of various elements was studied experimentally in detail.Small scale separation tests using simulated HLLW solutions were carried out.Pd(II) was strongly adsorbed by the AR-01 anion exchanger and effectively eluted off by using thiourea.Successful separation of Pd(II) from simulated HLLW was achieved.Tc(VII) also exhibited strong adsorption on AR-01 and could be eluted off by using U(IV) as a reductive eluent.Am(III) presented significantly high adsorbability and selectivity onto R-BTP/SiO 2-P adsorbents over various FPs including Ln(III).The R-BTP adsorbents were fairly stable in 3 M HNO 3,but instable against-irradiation-3M HNO 3.An advanced partitioning process consisting of three separation columns for the target elements separation from HLLW was proposed and the obtained experiment results indicated that the proposed process is essentially feasible. | WEI YueZhou WANG XinPeng LIU RuiQin WU Yan USUDA Shigekazu ARAI Tsuyoshi | 2012 | Science China Chemistry2012，55，9： | 9 |
| 3 | Realizing high low-electric-field energy storage performance in AgNbO_(3) ceramics by introducing relaxor behaviour显示文摘Both sustainable development in environment and safety of high-power systems require to develop a novel lead-free dielectric capacitor with high energy density(Wrec)at low applied electric field.In this work,a remarkably high Wrec of 2.9 J/cm^(3) accompanying with energy storage efficiency of 56% was achieved in Ag_(0.9)Sr_(0.05)NbO_(3) ceramic at a low applied electric field of 190 kV/cm,by improving antiferroelectricity and introducing relaxor behaviour.The improved anti-ferroelectric stability was attributed to the decreased tolerance factor and average electronegativity difference,while the relaxor behaviour was associated with the increased disordered local structure by Sr-doping.Moreover,the Ag_(0.9)Sr_(0.05)NbO_(3) ceramics also exhibited outstanding temperature stability in energy density with small variation less than 5% over 20-140℃.The results indicate that the Ag_(0.9)Sr_(0.05)NbO_(3) ceramic is a promising candidate for low-electric-field driving capacitors. | Kai Han Nengneng Luo Shuaifei Mao Fangping Zhuo Xiyong Chen Laijun Liu Changzheng Hu Huanfu Zhou Xinpeng Wang Yuezhou Wei | 2019 | Journal of Materiomics2019，5，4： | 5 |
| 4 | Adsorption behavior of Zr(IV) and Hf(IV) on a silica-based macroporous TODGA adsorbent显示文摘In order to separate Zr(IV) and Hf(IV) in acidic solution,several kinds of silica-based macroporous adsorbents were synthesized.Their adsorption selectivity for Zr(IV) and Hf(IV) in HCl solution was investigated,and the TODGA adsorbent for the two elements had the largest adsorption difference.The effects of acid type,HCl concentration,and temperature on the adsorption behavior of Zr(IV) and Hf(IV) onto the TODGA adsorbent were conducted by batch experiments.It was found that H+exhibited a quite strong influence on adsorption capacity of Zr(IV) and Hf(IV).Isotherm fitting showed that the Langmuir model agrees well with the experimental data.The thermodynamic parameters indicate that the adsorption processes for both elements are endothermic reactions.The TODGA adsorbent had the higher adsorption selectivity for Zr(IV) over Hf(IV) and could be promising for their mutual separation. | YIN Xiangbiao WEI Yuezhou ZU Jianhua | 2013 | Nuclear Science and Techniques2013，24，4： | 4 |
| 5 | Purification of scandium from concentrate generated from titanium pigments production waste显示文摘Nowadays 80%of scandium in China is obtained from titanium pigments production waste through a complex purification process.The study mainly focused on the purification of Sc from its concentrate generated from titanium pigments production waste by solvent extraction.Several extractants have been tried and 10%D_(2)EHPA-5%TBP-85%sulfonated kerosene exhibited the best extraction performance towards Sc in 7 mol/L H_(2)SO_(4)solution,so it was selected as the oil phase.0.5%of H_(2)O_(2)was added into the concentrated solution which can effectively inhibit the extraction of Ti.Both the extraction and back extraction parameters are optimized.The preferred extraction conditions were obtained,i.e.,acidity:7 mol/L H_(2)SO_(4),the phase ratio A/O:10,room temperature,mixed contact time:30 min,Sc concentrate:10 g/L,that the extraction rate of Sc in the above conditions was nearly 100%.NaOH was used for back extraction with the stripping rate 99%on the following conditions:5 mol/L NaOH stripping for 30 min at a phase ratio A/O:1 at 90℃.Finally,H_(2)C_(2)O_(4)was used to further purify the back extraction product and Sc_(2)(C_(2)O_(4))_(3)precipitant fo rmed.The final product Sc_(2)O_(3)with a purity over 99.5%was obtained by calcining Sc_(2)(C_(2)O_(4))_(3)at 1000℃for 2 h.A conceptual process for Sc purification was put forward and proved.The total recovery yield of Sc in the whole process is 95%. | Jie Zhou Shunyan Ning Jiejie Meng Shichang Zhang Wei Zhang Siyi Wang Yedan Chen Xinpeng Wang Yuezhou Wei | 2021 | Journal of Rare Earths2021，39，2： | 4 |
| 6 | Electrochemical behavior and electrowinning of palladium in nitric acid media显示文摘In this study,the electrochemical behavior of Pd(II)in nitric acid media was investigated using various electrochemical techniques.By analyzing the cyclic voltammogram of Pd(II)recorded at Pt electrode,a series of electrochemical reactions associated with palladium were recognized,indicating that Pd(II)undergoes a single step two-electrons irreversible process.Electroreduction reaction of Pd(II)and auto-catalytic reactions of nitrous acid are supposed to play a leading role in low and high concentrations of nitric acid,respectively.Stirring could facilitate the reduction of Pd(II)in relatively low nitric acid concentration(3 mol/L).The value of charge transfer coefficient was determined to be 0.18 for the measurements at 298 K.The diffusion coefficient of Pd(II)increased from 1.89×10 8cm2/s at 288 K to 4.23×10 8cm2/s at 318 K,and the activation energy was calculated to be 21.5 kJ/mol.In electrowinning experiments,SEM images of palladium obtained by electrolysis reveal the dendrite growth in all cases,which is uniform all over the entire surface of Pt electrode.The recovery ratios of Pd at different nitric acid concentrations are high,and the faradic efficiency of electrolysis decreases with increasing the nitric acid concentration.When stirring was introduced during electrolysis,the electrodeposition rate of Pd increased substantially. | LIU ShengChu WEI YueZhou LIU RuiQin FANG BaiZeng | 2013 | Science China Chemistry2013，56，12： | 3 |
| 7 | Challenges to develop single-column MA(Ⅲ) separation from HLLW using R-BTP type adsorbents显示文摘In order to directly separate trivalent minor actinides(MA:Am,Cm) from fission products(FP) containing rare earths(RE) in high level radioactive liquid waste(HLLW),the authors have challenged to develop a simplified MA separation process by extraction chromatography using a single column.Attention has been paid to a new type of nitrogen-donor ligands,R-BTP(2,6-bis(5,6-dialkyl-1,2,4-triazin-3-yl) pyridine,R:alkyl group) as an extractant because it shows high extraction selectivity for Am(Ⅲ) over RE(Ⅲ).It is known that the R-BTP ligands show different properties such as adsorbability and stability by having different alkyl groups.Therefore,some novel adsorbents were prepared by impregnating different types of R-BTP ligands(isohexyl-,isoheptyl-and cyheptyl-BTP) and a similar ligand to the R-BTP,ATP(2,6-bis(1-aryl-1H-tetrazol-5-yl)pyridines),into the porous silica/polymer support(SiO2-P particles).This work deals with comparison in adsorption and desorption properties of Am and some FP in HNO 3 solution onto such R-BTP type adsorbents,as well as chemical and radiolytic stability of the adsorbents.Then the possibility of a single-column separation of MA from main FP was pursued by evaluating the results of column experiments using the most promising adsorbent(isohexyl-BTP/SiO2-P) under temperature control.In addition,elution behaviors of U and Pd were also estimated. | USUDA Shigekazu WEI YueZhou LIU RuiQin LI Zheng XU YuanLai WU Yan KIM Seongyun | 2012 | Science China Chemistry2012，55，9： | 3 |
| 8 | Mechanism for nucleation and growth of electrochemical deposition of palladium(II) on a platinum electrode in hydrochloric acid solution显示文摘Palladium(II)and chloride ions tend to form complexes in aqueous solution.Both theoretical and experimental(by UV spectrum)results indicate that there are four complexes formed in aqueous solution containing 3 mol/L hydrochloric acid and 20mmol/L PdCl2.This work evaluates the kinetics of electrochemical deposition of palladium on a Platinum electrode.For this purpose,palladium electrodeposition was investigated by means of cyclic voltammetry(CV),potentiostatic current-time transients(CTTs)and Tafel curve.By CTTs curves,the regions corresponding to the charge transfer control,mixed control and diffusion control were identified.In the diffusion control region,palladium electrodeposition mechanism was characterized as progressive nucleation with three-dimensional(3D)growth under diffusion control;as for the mixed control region,an adsorption(IAds),ion transfer(IIT),and nucleation and growth(ING)model were proposed to analyze the current-time transients quantitatively,which could separate the IAds,IIT and ING perfectly. | GU Shuai WANG XinPeng WEI YueZhou FANG BaiZeng | 2014 | Science China Chemistry2014，57，5： | 2 |
| 9 | Direct Spectroscopic Determination of Europium( Ⅱ ) Concentration During Europium( Ⅲ ) Electro-Reduction in Hydrochloric Acid Medium显示文摘 | Ludek Jelinek Tsuyoshi Arai Wei Yuezhou Mikio Kumagai | 2007 | Journal of Rare Earths2007，25，1： | 2 |
| 10 | Selective adsorption and stable solidification of radioactive cesium ions by porous silica gels loaded with insoluble ferrocyanides显示文摘Development of highly functional cesium selective adsorbents for the decontamination of high-activity-level water(HALW) from the Fukushima NPP-1 accident is very urgent. In order to selectively adsorb the radioactive cesium, three kinds of novel porous silica gels loaded with insoluble ferrocyanides(SLFC) were prepared using a successive impregnation/precipitation method. Based on the results of previous research, the SLFC composites have relatively large uptake ratio above 95%, distribution coefficients(Kd) above 103 cm3/g, and excellent adsorption kinetics even in seawater. The solidification results also indicate that zeolites have an excellent Cs immobilization characteristic, gas-trapping and self-sintering abilities, and low leachability. We chose three kinds of SLFC composites to achieve the optimization of solidification by mixing with nine kinds of additives at high temperatures(up to 1200 °C). The Cs contents in the three composites were estimated to be below 30% of the initial contents and decreased with the three stages at calcination temperatures ranging from 25 to 1200 °C. By contrast, the Cs immobilization ratio was markedly lowered by mixing with additives: of those, allophane had the best immobilization result. By increasing the additive ratio to 50 wt%, the Cs immobilization ratio became almost 100% and no volatilization of Cs was detected even after calcination at 1200 °C. This result indicates that calcination of the mixture of SLFC composites after adsorbing Cs+ ions and specific additives under appropriate ratio is effective for stable solidification. | YIN XiangBiao WU Yan MIMURA Hitoshi NIIBORI Yuichi WEI YueZhou | 2014 | Science China Chemistry2014，57，11： | 2 |
| 11 | Studies on the Separation of Minor Actinides FromHigh-Level Wastes by Extraction ChromatographyUsing Novel Silica-Based Extraction Resins显示文摘 | Wei Yuezhou Kumagai Mikio Takashima Yoichi | 2000 | Nucl Technol2000，132，3： | 1 |
| 12 | Preface显示文摘Founded in 1935, the Institute of Mathematical Statistics (IMS) is an international professional and scholastic society devoted to the development, dissemination, and application of statistics and probability.IMS China, established in 2007, promotes the participation of Chinese scholars in activities of the Institute of Mathematical Statistics. | Chai ZhiFang Wei YueZhou | 2012 | Science China Chemistry2012，55，9： | 1 |
| 13 | Stability of isoHex-BTP/SiO_2-P adsorbent against acidic hydrolysis and γ-irradiation显示文摘Separation of trivalent minor actinides(MA(ⅡI): Am(ⅡI), Cm(ⅡI)) from fission products(FP) in high-level liquid waste(HLLW) is an important task in advanced nuclear-fuel reprocessing systems. For this purpose, an advanced aqueous partitioning process based on extraction chromatography method was studied. Because R-BTP extractants(R-BTP: 2,6-bis(5,6-dialkyl-1,2,4-triazin-3-yl)pyridine, R = alkyl group) exhibit high selectivity for MA(ⅡI) over trivalent rare-earth elements(RE(ⅡI)), a novel adsorbent isoHex-BTP/SiO2-P was prepared by impregnating isoHex-BTP extractant into the macroporous SiO2-P support with a mean diameter of 60 μm. The stability of isoHex-BTP/SiO2-P against nitric acid and γ-irradiation was investigated. It was found that isoHex-BTP/SiO2-P adsorbent shows good adsorption affinity to Dy(ⅡI). The hydrolytic and radiolytic stability of isoHex-BTP/SiO2-P adsorbent in 0.01 mol/L HNO3 was fairly promising. However, the adsorption amount Q of Dy(ⅡI) decreased dramatically in 3 mol/L HNO3 with the increase of the absorbed dose and became nearly zero at the absorbed dose over 46 kGy. These results suggest that with the synergetic effect of radiation and acidic hydrolysis, the adsorbent instantly loses its efficacy. | WANG XinPeng NING ShunYan LIU RuiQin WEI YueZhou | 2014 | Science China Chemistry2014，57，11： | 1 |
| 14 | Effects of pH and dissolved oxygen on electrochemical behavior and oxide films of 304SS in borated and lithiated high temperature water显示文摘 | Hua Sun Xinqiang Wu En-Hou Han Yuezhou Wei | 2012 | Corrosion Science2012，，： | 1 |
| 15 | Influence of Sc Addition on Precipitation Behavior and Properties of Al-Cu-Mg Alloy显示文摘In this study, the Al-5.10Cu-0.65 Mg alloys without and with 0.2 wt% Sc addition were prepared to unveil the effect of Sc on the precipitate behavior and properties by atomic-scale scanning transmission electron microscopy. The results show that addition of Sc is able to significantly suppress the formation of the peak-hardening θ’ and S precipitates but in favor of stabilizing Guinier–Preston–Bagaryatsky(GPB) zones during isothermal aging at 180 ℃. The generation of unique GPB precursors dictating the evolution of the subsequent peak-hardening GPB zones is highly correlated with the insufficient vacancies and dragging effect of Sc to Cu in the Al-Cu-Mg-Sc alloy, thereby restricting the nucleation of θ′ and S precipitates owing to the decreased available Cu solutes. In property, 0.2 wt% Sc addition can not only enhance the corrosion resistance but also the electrical conductivity of the peak-hardening alloy. In addition, the peak-hardening Al-Cu-Mg-Sc alloy is also featured with increased strength without losing the ductility compared to its solid solution state. Further analyses indicate that the improved properties are essentially attributed to the formation of densely distributed strain-free GPB zones and smaller precipitate-free zones. The obtained results could provide a potential design strategy of high-performance alloys by Sc addition. | Xiangbin Han Shuangbao Wang Bo Wei Shuai Pan Guizhen Liao Weizhou Li Yuezhou Wei | 2022 | Acta Metallurgica Sinica(English Letters)2022，35，6： | 1 |
| 16 | Kinetics of Iodine Poisoning of Hydrophobic Pt/SDBC Catalyst forHydrogen Isotopic Exchange Reaction 显示文摘 | Wei Yuezhou Shimizu M | 1997 | Can J Chem Eng1997，75，6： | 1 |
| 17 | Adsorption behavior of Me2-CA-BTP/SiO2-P adsorbent toward MA(Ⅲ) and Ln(Ⅲ) in nitrate solution显示文摘A porous Me_2-CA-BTP/SiO_2-P adsorbent was prepared to separate MA(Ⅲ) from Ln(Ⅲ) in high level liquid waste(HLLW).The adsorption behavior of Me_2-CA-BTP/SiO_2-P toward ^(241)Am(Ⅲ) and Ln(Ⅲ) in 0.01 M HNO_3-NaNO_3 solution was studied.Me_2-CA-BTP/SiO_2-P showed high adsorption and selectivity toward ^(241)Am(Ⅲ) over Ln(Ⅲ) fission products with the separation factor(SF) reaching to 557,2355,1952,1082,214,105,86,14 for Y,La,Ce,Nd,Sm,Eu,Gd and Dy respectively in 0.01 M HNO_3-0.99 M NaNO_3 solution.The adsorption kinetics of both Dy(Ⅲ) and Eu(Ⅲ) on Me_2-CA-BTP/SiO_2-P was studied and followed pseudo-second-order rate equation indicating chemical sorption as the rate-limiting step of the adsorption,and the adsorption isotherm of Dy(Ⅲ) and Eu(Ⅲ) matched better with the Langmuir isotherm than the Freundlich isotherm with the adsorption amount around 0.22 and 0.20 mmol/g respectively.Thermodynamic study revealed that the adsorption of both Dy(Ⅲ)and Eu(Ⅲ) on Me_2-CA-BTP/SiO_2-P was spontaneous and endothermic processes with a positive entropy at 298,308,313 K. | Shunyan Ning Qing Zou XinpengWang RuiqinLiu Yuezhou Wei | 2016 | Science China Chemistry2016，59，7： | 1 |
| 18 | Actinide Ion Exchange Technology in the Back End of the Nuclear Fuel Cycle显示文摘 | Navratil J D Wei Yuezhou | 2001 | Nukleonika2001，46，2： | 1 |
| 19 | Adsorption behaviors of strontium using macroporous silica based hexagonal tungsten oxide显示文摘A novel macroporous silica-based hexagonal tungsten oxide(h-WO_3/SiO_2) with exchangeable sodium cations located in hexagonal tunnel structure was synthesized by a facile hydrothermal treatment of sodium tungstate dihydrate with 1 mol/L HCl solution. Utilization of the h-WO_3/SiO_2 adsorbent to remove aqueous strontium was investigated under the condition of various p H values, contact time, the initial concentration of metal ions, salt ion concentration, and coexisting ions. According to the experimental data, Sr^(2+) adsorption equilibrium was achieved within 15 min in acidic solution, and the maximum removal capacity of Sr^(2+) occurred at pH 4. The kinetic adsorption of Sr^(2+) on h-WO_3/SiO_2 was controlled by pseudo second-order model, and the saturated adsorption of Sr^(2+) on h-WO_3/SiO_2 was better described by Langmuir and Redlich-Peterson isotherm models compared with the Freundlich isotherm model. The distribution coefficient of Sr^(2+) was more than 2000 cm^3/g in the presence of Ca^(2+), Mg^(2+), La^(2+), and Eu^(2+), indicating that the h-WO_3/SiO_2 showed excellent selectivity towards Sr^(2+) in pH 4. | Xiaoxia Zhang Yan Wu Hao Wu Yuezhou Wei | 2016 | Science China Chemistry2016，59，5： | 1 |
| 20 | Synthesis of a novel macroporous silica-based polymeric material containing 4,4 ' ( 5 ' )-di ( tert-butylcyclohexano)-18-crown-6 functional group and its adsorption mechanism for strontium显示文摘 | Zhang Anyun Wei Yuezhou Mikio K | 2004 | React Funct Polym2004，61，： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员