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Uranium, plutonium and neptunium co-recovery with high nitric acid concentration in extraction section by simplified solvent extraction process 采用简化溶剂萃取法在萃取段高硝酸浓度条件下对铀、钚和镎进行共回收
Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1671
M. Nakahara, Y. Sano
{"title":"Uranium, plutonium and neptunium co-recovery with high nitric acid concentration in extraction section by simplified solvent extraction process","authors":"M. Nakahara, Y. Sano","doi":"10.1524/RACT.2009.1671","DOIUrl":"https://doi.org/10.1524/RACT.2009.1671","url":null,"abstract":"Abstract As a part of NEXT, the behavior of Np in a simplified solvent extraction process using TBP as an extractant for U, Pu and Np co-recovery was investigated. Two approaches to Np co-recovery with U and Pu in the irradiated fast reactor core fuel using a dissolver solution in a counter current were examined. One used a feed solution with a high HNO3 concentration, and the other used a scrubbing solution with a high HNO3 concentration. The leakages of Np to the raffinate were 1.1 and 4.7% using high HNO3 concentration feed and scrubbing solutions, respectively. Simulation results based on these experiments showed that high HNO3 concentration in the feed solution is advantageous for the Np extraction because Np oxidation progresses in the feed solution before being supplied into the centrifugal contactor, and there is less effect of HNO2 at the extraction section.","PeriodicalId":21029,"journal":{"name":"Radiochimica Acta Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76007528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Extraction of americium(III) from nitric acid medium by CMPO-TBP extractants in ionic liquid diluent 离子液体稀释剂中cpo - tbp萃取剂萃取硝酸介质中的镅(III)
Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1975
A. Rout, K. Venkatesan, T. Srinivasan, P. Vasudeva Rao
{"title":"Extraction of americium(III) from nitric acid medium by CMPO-TBP extractants in ionic liquid diluent","authors":"A. Rout, K. Venkatesan, T. Srinivasan, P. Vasudeva Rao","doi":"10.1524/RACT.2009.1975","DOIUrl":"https://doi.org/10.1524/RACT.2009.1975","url":null,"abstract":"Abstract Extraction of americium(III) from nitric acid medium by a solution of tri-n-butylphosphate (TBP) and n-octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) in room temperature ionic liquid, 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (bmimNTf2), was studied and the results were compared with that obtained with CMPO-TBP in n-doddecane (n-DD). The distribution ratio of 241Am(III) in TBP-CMPO/bmimNTf2 was measured as a function of various parameters such as concentrations of nitric acid, CMPO, bmimNO3, NaNO3 and TBP and temperature. Remarkably large distribution ratios were observed for the extraction of americium(III) when bmimNTf2 acted as diluent and the extraction was insignificant in the absence of CMPO. The stoichiometry of metal–solvate in organic phase was determined by the slope analysis of extraction data and it indicated the formation of 1:3 (Am:CMPO) complex in organic phase. Viscosity of TBP-CMPO/bmimNTf2 at various temperatures and enthalpy change accompanied by the extraction of americium(III) were determined and reported in this paper.","PeriodicalId":21029,"journal":{"name":"Radiochimica Acta Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78844327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 45
Determination of 126Sn half-life from ICP-MS and gamma spectrometry measurements ICP-MS和γ能谱法测定126Sn半衰期
Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1673
P. Bienvenu, L. Ferreux, G. Andreoletti, N. Arnal, M. Lépy, M. Bé
{"title":"Determination of 126Sn half-life from ICP-MS and gamma spectrometry measurements","authors":"P. Bienvenu, L. Ferreux, G. Andreoletti, N. Arnal, M. Lépy, M. Bé","doi":"10.1524/RACT.2009.1673","DOIUrl":"https://doi.org/10.1524/RACT.2009.1673","url":null,"abstract":"Abstract A new value of 126Sn half-life was determined by combination of inductively coupled plasma-mass spectrometry (ICP-MS) and gamma spectrometry measurements on purified sample solutions collected from nuclear fuel reprocessing. 126Sn was isolated through dissolution of fission product precipitates and liquid-liquid extraction with N-benzoyl-N-phenyl-hydroxylamine (BPHA). The abundance of 126Sn atoms together with the absence of interfering species in the analysed solutions made it possible to measure both mass concentration and nuclide activity with high precision and accuracy. This led to a 126Sn half-life value of 1.980(57)×105 a.","PeriodicalId":21029,"journal":{"name":"Radiochimica Acta Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85739166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Evaluation of trace elements in chewing tobacco and snuff using instrumental neutron activation analysis (INAA) and atomic absorption spectroscopy (AAS) 中子活化分析和原子吸收光谱法评价嚼烟和鼻烟中微量元素
Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1672
S. Waheed, N. Siddique, S. Rahman
{"title":"Evaluation of trace elements in chewing tobacco and snuff using instrumental neutron activation analysis (INAA) and atomic absorption spectroscopy (AAS)","authors":"S. Waheed, N. Siddique, S. Rahman","doi":"10.1524/RACT.2009.1672","DOIUrl":"https://doi.org/10.1524/RACT.2009.1672","url":null,"abstract":"Abstract Nine samples of chewing tobacco, snuff, tobacco leaf and ash were analyzed using Instrumental Neutron Activation Analysis (INAA) and Atomic Absorption Spectroscopy (AAS). Almost all samples of chewing tobacco and snuff studied in this work contain substantial amounts of Mg, Mn, Na, K, V, Sc, Rb and Fe. Furthermore, varying amounts of Al, Ba, Ca, Ce, Co and Zn were also detected in all tobacco samples. Of the toxic elements which were determined using INAA, As, Sb and Hg were quantified in only few tobacco samples. However, other toxic elements, which were determined using AAS, such as Cu, Pb and Cd were detected in almost all samples of chewing tobacco and snuff. The concentration of majority of the detected elements is high in ash samples which imply that most elements in chewing tobacco and snuff may originate from the addition of ash.","PeriodicalId":21029,"journal":{"name":"Radiochimica Acta Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78923716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
X-ray absorption spectroscopic study of trivalent and tetravalent actinides in solution at varying pH values 不同pH值溶液中三价和四价锕系元素的x射线吸收光谱研究
Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1674
B. Brendebach, N. Banik, C. Marquardt, J. Rothe, M. Denecke, H. Geckeis
{"title":"X-ray absorption spectroscopic study of trivalent and tetravalent actinides in solution at varying pH values","authors":"B. Brendebach, N. Banik, C. Marquardt, J. Rothe, M. Denecke, H. Geckeis","doi":"10.1524/RACT.2009.1674","DOIUrl":"https://doi.org/10.1524/RACT.2009.1674","url":null,"abstract":"Abstract We perform X-ray absorption spectroscopy (XAS) investigations to monitor the stabilization of redox sensitive trivalent and tetravalent actinide ions in solution at acidic conditions in a pH range from 0 to 3 after treatment with holding reductants, hydroxylamine hydrochloride (NH2OHHCl) and Rongalite (sodium hydroxymethanesulfinate, CH3NaO3S). X-ray absorption near edge structure (XANES) measurements clearly demonstrate the stability of the actinide species for several hours under the given experimental conditions. Hence, structural parameters can be accurately derived by extended X-ray absorption fine structure (EXAFS) investigations. The coordination structure of oxygen atoms belonging to water ligands surrounding the actinide ions does not change with increasing pH value (approximately 11 O atoms at 2.42 Å in the case of U(IV) at pH 1, 9 O atoms at 2.52 Å for Np(III) at pH 1.5, and 10 O atoms at 2.49 Å for Pu(III) up to pH 3), indicating that hydrolysis reactions are suppressed under the given chemical conditions.","PeriodicalId":21029,"journal":{"name":"Radiochimica Acta Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88875776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 51
Novel polymer vectors of 64Cu 新型64Cu聚合物载体
Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1669
J. Kozempel, M. Hrubý, M. Nováková, J. Kučka, L. Lešetický, O. Lebeda
{"title":"Novel polymer vectors of 64Cu","authors":"J. Kozempel, M. Hrubý, M. Nováková, J. Kučka, L. Lešetický, O. Lebeda","doi":"10.1524/RACT.2009.1669","DOIUrl":"https://doi.org/10.1524/RACT.2009.1669","url":null,"abstract":"Abstract We describe a preparation of novel polymer vectors of 64Cu based on co-polymers of poly- (N-isopropylacrylamide) and poly- (N-hydroxypropylmethacrylamide). DOTA, DTPA, dipicolylamine, thiosemicarbazone and Ag-ionophore-II ligands were tested to bind 64Cu in a polymer chain. Labeling yields with no-carrier-added 64Cu varied from 95 to 99% in 30 min. at laboratory temperature. Vectors were stable in vitro for 24 h in human serum and might be prospective for targeted 64Cu radio or combined radiochemotherapy.","PeriodicalId":21029,"journal":{"name":"Radiochimica Acta Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85898690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
An adapted purification procedure to improve the quality of 90Y for clinical use 一种改进的纯化程序，以提高临床使用90Y的质量
Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1666
Abmel Xiques Castillo, Keila Isaac Olivé, Edgar Casanova González, Denis Beckford, R. Leyva Montaña, A. Montero Álvarez, Eunice Olivé Álvarez
{"title":"An adapted purification procedure to improve the quality of 90Y for clinical use","authors":"Abmel Xiques Castillo, Keila Isaac Olivé, Edgar Casanova González, Denis Beckford, R. Leyva Montaña, A. Montero Álvarez, Eunice Olivé Álvarez","doi":"10.1524/RACT.2009.1666","DOIUrl":"https://doi.org/10.1524/RACT.2009.1666","url":null,"abstract":"Abstract There is an increasing interest for 90Y for radionuclide therapy. However, radioimmunotherapy, one of the most important applications for 90Y, demands a very high purity product. Obtaining a high quality 90Y is difficult not only because of the complex and time consuming production schemes but also because of the quality control which has challenging tasks like the determination of 90Sr at very low concentrations. The present paper investigates a reported purification procedure for the removal of stable metal trace contaminants from an 90Y solution, seeking for its potential use in the elimination of the radioactive contaminant 90Sr and its fast determination. For this purpose a washing step with HNO3 acid is introduced to elute 90Sr, the order of each acid solution is rearranged to reduce the potential contaminants present in acids and the size of the column is reduced to further optimize the procedure. As a result, an improved purification method is obtained, which allows the removal of both trace metal contaminants and 90Sr from an 90Y solution and the measurement of 90Sr/90Y ratios of the order of 10-7, which are well below the established pharmacopeia limit of 2×10-5.","PeriodicalId":21029,"journal":{"name":"Radiochimica Acta Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77147134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Kinetic and thermodynamic studies on the adsorption of U(VI) ions on densely crosslinked poly(methacrylic acid) from aqueous solutions 密交联聚甲基丙烯酸吸附U(VI)离子的动力学和热力学研究
Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1668
C. Özeroğlu, G. Keçeli
{"title":"Kinetic and thermodynamic studies on the adsorption of U(VI) ions on densely crosslinked poly(methacrylic acid) from aqueous solutions","authors":"C. Özeroğlu, G. Keçeli","doi":"10.1524/RACT.2009.1668","DOIUrl":"https://doi.org/10.1524/RACT.2009.1668","url":null,"abstract":"Abstract In this study, densely crosslinked poly(methacrylic acid) was used to adsorb uranium(VI) ions from aqueous solution. For this purpose, the crosslinked copolymer of ethylene glycol dimethacrylate (EGDM) and methacrylic acid (MA) containing 25% (w/w) methacrylic acid (MA) was synthesized by using dibenzoyl peroxide-N,N-dimethylaniline (BPO-DMA) initiator system at room temperature. The adsorption of uranium(VI) ions on the copolymer sample (0.02 g copolymer/5 mL solution of U(VI) ions) was carried out in a batch reactor. The parameters which effect the uranium adsorption process, such as, contact time, pH of solution, initial uranium(VI) concentration and temperature were investigated. It was observed that an increase in these parameters enhanced the removal of U(VI) ions from aqueous solution. The adsorption data were modelled by the Freundlich, Langmuir and Dubinin–Radushkevich (D–R) isotherms. The adsorption capacity of the crosslinked copolymer and free energy change were calculated by using D–R isotherms. Thermodynamic parameters (ΔH°, ΔS° and ΔG°) were determined for the adsorption of U(VI) ions from aqueous solutions by the crosslinked copolymer bearing methacrylic acid functional groups. Experimental adsorption data were analyzed using sorption kinetic models of the pseudo-first order and pseudo-second order kinetic models. It was observed that pseudo-second order kinetic model provided a high goodness of fit with experimental data for the adsorption of U(VI) ions on the crosslinked copolymer bearing methacrylic acid functional groups. The densely crosslinked poly(methacrylic acid) might be of interest in large scale uranium removals from aqueous solution, since it had high uranyl sorption capacities ranging from 0.16 mmol/g to 2.37 mmol/g copolymer at pH 2.7 (293 K).","PeriodicalId":21029,"journal":{"name":"Radiochimica Acta Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85546813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Production and separation of no-carrier-added 93,94,95Tc from 9Be activated yttrium target 9Be活化钇靶中无载体添加93,94,95tc的制备与分离
Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1667
M. Maiti, S. Lahiri
{"title":"Production and separation of no-carrier-added 93,94,95Tc from 9Be activated yttrium target","authors":"M. Maiti, S. Lahiri","doi":"10.1524/RACT.2009.1667","DOIUrl":"https://doi.org/10.1524/RACT.2009.1667","url":null,"abstract":"Abstract Proton rich Tc radionuclides have been produced for the first time through 89Y(9Be, xn)93,94,95Tc reactions. In order to optimize the yield of a particular radionuclide of choice, batch yield of 93Tc, 94Tc and 95Tc have been measured at different incident energies using stacked-foil technique followed by off-line γ-spectrometry. No-carrier-added (nca) 93,94,95Tc radionuclides have been separated from bulk yttrium by liquid–liquid extraction (LLX) and solid–liquid extraction (SLX) techniques. Trioctylamine (TOA) diluted in cyclohexane was used as liquid anion exchanger in LLX in presence of HCl. SLX was carried out using cation and anion exchanger resin, DOWEX-50 and DOWEX-1, respectively, in HCl medium.","PeriodicalId":21029,"journal":{"name":"Radiochimica Acta Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87938670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Determination of solubility parameters of cobalt(II) and indium(III) oxinates by tracer technique 示踪法测定氧化钴(II)和氧化铟(III)的溶解度参数
Radiochimica Acta Radiochimica Acta Pub Date : 2009-12-01 DOI: 10.1524/RACT.2009.1665
M. Mandal, R. Sarkar (Sain), S. Basu
{"title":"Determination of solubility parameters of cobalt(II) and indium(III) oxinates by tracer technique","authors":"M. Mandal, R. Sarkar (Sain), S. Basu","doi":"10.1524/RACT.2009.1665","DOIUrl":"https://doi.org/10.1524/RACT.2009.1665","url":null,"abstract":"Abstract Effects of different diluents on the extraction of cobalt(II) and indium(III) oxinate complexes have been studied using Co-60 and In-114m as radiotracers. Theory of regular solutions was applied for the determination of solubility parameters (δ) of cobalt oxinate and indium oxinate which were found to be 34.45 J1/2cm-3/2 and 34.03 J1/2 cm-3/2, respectively. Besides, distribution of each of the two complexes was studied in the mixtures of two solvents, assigned as good and poor solvents, in accordance with their individual behaviors. In both of the two cases, experimentally determined values of distribution-coefficient differed from those of calculated values which shows the importance of solute-solvent and solvent-solvent interaction in the present system.","PeriodicalId":21029,"journal":{"name":"Radiochimica Acta Radiochimica Acta","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91337558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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