Solvent Extraction and Ion Exchange最新文献_第8页

Separation of Americium from a Complex Matrix by Solvent Extraction Using CyMe4BTPhen in a Room Temperature Ionic Liquid Diluent 室温离子液体稀释剂中CyMe4BTPhen溶剂萃取分离复杂基体中的汞

IF 2 4区化学

Solvent Extraction and Ion Exchange Pub Date : 2022-03-10 DOI: 10.1080/07366299.2022.2049051

J. Mahmoud, M. Higginson, Paul Thompson, F. Livens, Scott L. Heath

{"title":"Separation of Americium from a Complex Matrix by Solvent Extraction Using CyMe4BTPhen in a Room Temperature Ionic Liquid Diluent","authors":"J. Mahmoud, M. Higginson, Paul Thompson, F. Livens, Scott L. Heath","doi":"10.1080/07366299.2022.2049051","DOIUrl":"https://doi.org/10.1080/07366299.2022.2049051","url":null,"abstract":"ABSTRACT The extraction performance and mechanism of 2,9-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-benzo[1,2,4]triazin-3-yl)-1,10-phenanthroline (CyMe4BTPhen) in the room temperature ionic liquid 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C4mim][NTf2]) have been studied and are herein reported. Americium is extracted from nitric acid solutions by cation exchange and is most efficient at low (< 1 M) nitric acid concentrations as opposed to the high (4 M) concentration preferred when using most traditional molecular diluents. The kinetics are slow, taking 24 hours to achieve quantitative extraction of americium but are greatly improved, achieving the same within 8 hours, by dilution with 1-octanol. High SFAm/Eu > 3000 were achieved although decontamination factors for americium from more complex matrices were non-competitive with extraction using traditional molecular diluents. Modest improvements in decontamination factor were attained by the addition of the hydrophilic reagent N,N,N’,N’-tetraethyl diglycolamide (TEDGA).","PeriodicalId":22002,"journal":{"name":"Solvent Extraction and Ion Exchange","volume":"40 1","pages":"681 - 692"},"PeriodicalIF":2.0,"publicationDate":"2022-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48781008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of the ALSEP Process: Investigating Equilibrium and Intermediate Complexes of the Scrub Stage ALSEP过程的表征：研究洗涤阶段的平衡和中间配合物

IF 2 4区化学

Solvent Extraction and Ion Exchange Pub Date : 2022-02-24 DOI: 10.1080/07366299.2022.2037222

Gabriela A. Picayo, Brian D. Etz, Madeleine A. Eddy, Shubham Vyas, M. Jensen

{"title":"Characterization of the ALSEP Process: Investigating Equilibrium and Intermediate Complexes of the Scrub Stage","authors":"Gabriela A. Picayo, Brian D. Etz, Madeleine A. Eddy, Shubham Vyas, M. Jensen","doi":"10.1080/07366299.2022.2037222","DOIUrl":"https://doi.org/10.1080/07366299.2022.2037222","url":null,"abstract":"ABSTRACT A unique combination of real-time and conventional optical spectroscopy, off-line chemical analyses, and equilibrium solvent extraction measurements were employed to monitor progressive changes in the speciation of the organic-phase complexes of neodymium or americium in the biphasic scrub stage of the Actinide-Lanthanide Separation (ALSEP) solvent extraction process proposed for trivalent actinide/lanthanide separations. Consistent with the findings of other researchers, four unique organic-phase species are identified by three separate methods of multivariate analysis. The organic phase initially contains M(TEHDGA)2(HEH[EHP])2(NO3)3 complexes. As the ALSEP organic phase is scrubbed with an aqueous malonate buffer, the complex loses HNO3 to form M(TEHDGA)2(H(EH[EHP])2)(NO3)2 as the first organic-phase intermediate species. Further contact with the scrub aqueous phase forms a second intermediate species, M(TEHDGA)(H(EH[EHP])2)2(NO3), and eventually a complex containing only HEH[EHP], M{H(EH[EHP])2}3 (where TEHDGA = N,N,N’,N’-tetra(2-ethylhexyl)diglycolamide and HEH[EHP] = 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester). Similar intermediate species were also observed in equilibrium ALSEP organic phases when lower aqueous concentrations of nitric acid (e.g., 0.5 M HNO3) were used to extract actinides or lanthanides.","PeriodicalId":22002,"journal":{"name":"Solvent Extraction and Ion Exchange","volume":"40 1","pages":"654 - 679"},"PeriodicalIF":2.0,"publicationDate":"2022-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46050252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Recent Progress on the Structure-Performance Relationship between Diglycolamide Extractants and f-Elements 二乙醇酰胺萃取剂与f元素结构性能关系研究进展

IF 2 4区化学

Solvent Extraction and Ion Exchange Pub Date : 2022-02-21 DOI: 10.1080/07366299.2021.2006884

Zhibin Liu, Huibo Li, Yaoyang Liu, Chuang Zhao, Cai-shan Jiao, Yu Zhou, Meng Zhang, Yang Gao

{"title":"Recent Progress on the Structure-Performance Relationship between Diglycolamide Extractants and f-Elements","authors":"Zhibin Liu, Huibo Li, Yaoyang Liu, Chuang Zhao, Cai-shan Jiao, Yu Zhou, Meng Zhang, Yang Gao","doi":"10.1080/07366299.2021.2006884","DOIUrl":"https://doi.org/10.1080/07366299.2021.2006884","url":null,"abstract":"ABSTRACT Diglycolamides (DGAs) belong to the class of “CHON” type compounds and can form tridentate complexes with metal ions. DGA-based extractants are a subject of great interest in actinide partitioning due to their exceptionally high affinity for trivalent actinides and lanthanides. Since the separation performance of DGAs are closely related to their molecular structures, many structure-modification schemes have been proposed such as the attachment of different alkyl substituents to an amidic N atom or anchoring multiple DGA arms onto a scaffold. In this paper, literature reports that describe the effects of such modifications on the structure and performance of DGAs are summarized. By comparing the extraction and separation properties of DGA extractants with different structures, the relationship between the structure and properties of DGAs is discussed. Such work should be helpful for gaining a more comprehensive, accurate and in-depth understanding of the relationship between structure and property of DGAs to be developed. It should also be beneficial for the structural design of more new DGA extractants.","PeriodicalId":22002,"journal":{"name":"Solvent Extraction and Ion Exchange","volume":"40 1","pages":"540 - 570"},"PeriodicalIF":2.0,"publicationDate":"2022-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48390720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Extraction of Ln(III) and An(III) by N,N-di(2-ethylhexyl)- thio-diglycolamic Acid N，N-二（2-乙基己基）-硫代二甘醇酰胺萃取Ln（III）和An（III）

IF 2 4区化学

Solvent Extraction and Ion Exchange Pub Date : 2022-02-03 DOI: 10.1080/07366299.2022.2032938

Chang Jin, Qian Liu, Yu Du, Chao Xu, Tingting Liu, Tuo Fang, Ganlin Wang, Liyang Zhu, Yan Zhang, Suliang Yang, G. Tian

{"title":"Extraction of Ln(III) and An(III) by N,N-di(2-ethylhexyl)- thio-diglycolamic Acid","authors":"Chang Jin, Qian Liu, Yu Du, Chao Xu, Tingting Liu, Tuo Fang, Ganlin Wang, Liyang Zhu, Yan Zhang, Suliang Yang, G. Tian","doi":"10.1080/07366299.2022.2032938","DOIUrl":"https://doi.org/10.1080/07366299.2022.2032938","url":null,"abstract":"ABSTRACT The extraction of Nd(III), Eu(III), Am(III), and Cm(III), trivalent lanthanides and actinides in high level nuclear waste, by the extractant N,N-di(2-ethylhexyl)-thio-diglycolamic acid (HDEHSDGA, HA) is investigated via thermochemical and spectroscopic methods. In this study, HDEHSDGA behaves as a conventional mono-basic cation-exchanging ligand extracting Ln(III) and An(III) from nitrate solutions of pH region. The information obtained from the extraction experiments and the spectroscopic analyses indicate that the primary extracted complex species may be MA3 · 2H2O for these four cations and likely for the other trivalent f-elements. In the extracted complexes, the anionic monomer extractant A− coordinates to the metal ions presumably forming bidentate coordination via the carbonyl oxygen atom and one of the oxygen atoms of the carboxylate; it appears that the thio-ether does not directly participate in the complexation reaction. The results ultimately demonstrate that HDEHSDGA does not exhibit significant selectivity for An(III) over Ln(III), in contrast to results reported in a previous study conducted with unpurified extractant.","PeriodicalId":22002,"journal":{"name":"Solvent Extraction and Ion Exchange","volume":"40 1","pages":"641 - 653"},"PeriodicalIF":2.0,"publicationDate":"2022-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49656837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mutual Separation of Ln and an Using TODGA and DTBA with High Organic Acid Concentrations 用TODGA和DTBA在高有机酸浓度下相互分离Ln和an

IF 2 4区化学

Solvent Extraction and Ion Exchange Pub Date : 2022-01-10 DOI: 10.1080/07366299.2021.2024650

Y. Sasaki, M. Kaneko, M. Matsumiya, M. Nakase, K. Takeshita

{"title":"Mutual Separation of Ln and an Using TODGA and DTBA with High Organic Acid Concentrations","authors":"Y. Sasaki, M. Kaneko, M. Matsumiya, M. Nakase, K. Takeshita","doi":"10.1080/07366299.2021.2024650","DOIUrl":"https://doi.org/10.1080/07366299.2021.2024650","url":null,"abstract":"ABSTRACT Developing the conventional separation method by which minor actinides (MA) such as Am and Cm are separated from lanthanides is important with respect to their recovery and isolation from high-level radioactive waste (HLW). Owing to the chemical behavior of trivalent lanthanide and actinide ions with similar ionic radii, realizing this separation is still challenging. All lanthanides, Am, and Cm can be extracted using diglycolamide (DGA) extractants, and relatively high An/Ln separation efficiencies have been obtained using diethylenetriamine-N,N’,N”-triacetic acid-N,N”-bis(diethylacetamide) (DTBA). Referring to our previous study, where a good separation and a MA recovery of approximately 95% with the co-existence of 5% Nd in the aqueous phase were observed. To improve these results as well as the separation conditions, under modified conditions by adding lactic acid to stabilize pH, the recovery rates observed were as follows: 97.1% for average Ln metals with the co-existence of 1.59% Am in the organic phase and 98.4% for Am with the co-existence of 2.95% Ln in the aqueous phase.","PeriodicalId":22002,"journal":{"name":"Solvent Extraction and Ion Exchange","volume":"40 1","pages":"620 - 640"},"PeriodicalIF":2.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42110596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Recovery of Palladium by Extraction-electrodeposition Using N, N, N’, N’, N”, N”- Hexaoctyl-nitrilotriacetamide N, N, N '， N '， N '， N '， N ' -六辛基-硝基三乙酰胺萃取-电沉积法回收钯

IF 2 4区化学

Solvent Extraction and Ion Exchange Pub Date : 2022-01-05 DOI: 10.1080/07366299.2021.2023268

Ryoma Kinoshita, M. Matsumiya, Y. Sasaki

{"title":"Recovery of Palladium by Extraction-electrodeposition Using N, N, N’, N’, N”, N”- Hexaoctyl-nitrilotriacetamide","authors":"Ryoma Kinoshita, M. Matsumiya, Y. Sasaki","doi":"10.1080/07366299.2021.2023268","DOIUrl":"https://doi.org/10.1080/07366299.2021.2023268","url":null,"abstract":"ABSTRACT It is essential to develop solvent extraction (SX), and electrodeposition (ED) processes for palladium to reduce the volume of acid and organic media. In this study, the extraction reaction of Pd(II) in chloride media using of N, N, N’, N’, N”, N”-hexaoctyl-nitrilotriacetamide (NTAamide(C8)) as a novel extractant has been demonstrated. Three diluents with high dielectric constants (acetophenone (AP), 1,2-dichloroethane (DCE), and 1-octanol (OC)) were used for the solvent extraction reaction. The slope analysis indicated that the anion exchange extraction reaction of Pd(II) was consistent with an approximately 2:1 stoichiometry for the NTAamide(C8)/AP and NTAamide(C8)/DCE systems, and 1:1 for NTAamide(C8)/OC. Moreover, the ED behavior of the extracted Pd(II) complex was investigated using cyclic voltammetry (CV). Palladium reduction was found to be an irreversible process based on analysis of the standard rate constant. A semi-integral analysis of the voltammogram determined the diffusion coefficients of the extracted Pd(II) complex in the AP, DCE, and OC systems to be 3.7 ± 0.1 × 10−10, 2.8 ± 0.1 × 10−10 and 1.5 ± 0.2 × 10−10 m2 s−1, respectively. Furthermore, consecutive extraction-electrodeposition processes using the NTAamide(C8)/AP system were carried out for five cycles. High extraction percentage (E > 91%) and current efficiency (ε > 83.1%) were attained in all cycles. The electrodeposits recovered from the extraction-electrodeposition process were identified as Pd metal through X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) analyses.","PeriodicalId":22002,"journal":{"name":"Solvent Extraction and Ion Exchange","volume":"40 1","pages":"606 - 619"},"PeriodicalIF":2.0,"publicationDate":"2022-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42291602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anion-exchange Experiment of Zr, Hf, and Th in HNO3 and Quantum Chemical Study on the Nitrate Complexes toward Chemical Research on Element 104, Rf Zr、Hf和Th在HNO3中的阴离子交换实验及硝酸盐配合物的量子化学研究

IF 2 4区化学

Solvent Extraction and Ion Exchange Pub Date : 2021-12-31 DOI: 10.1080/07366299.2021.2020956

E. Watanabe, Y. Kasamatsu, T. Yokokita, S. Hayami, Katsuma Tonai, H. Ninomiya, N. Kondo, Y. Shigekawa, H. Haba, Y. Kitagawa, M. Nakano, A. Shinohara

引用次数: 0

Study on Extraction Behavior of Re(VII) with Bis-triamide Extractants 双三酰胺萃取剂对Re（VII）萃取行为的研究

IF 2 4区化学

Solvent Extraction and Ion Exchange Pub Date : 2021-12-29 DOI: 10.1080/07366299.2021.2016935

Xiaoyuan Zhou, Rulei Wu, Jinyang Kang, Yu Fan, Chao Huang, Yongdong Jin, Chuanqin Xia

{"title":"Study on Extraction Behavior of Re(VII) with Bis-triamide Extractants","authors":"Xiaoyuan Zhou, Rulei Wu, Jinyang Kang, Yu Fan, Chao Huang, Yongdong Jin, Chuanqin Xia","doi":"10.1080/07366299.2021.2016935","DOIUrl":"https://doi.org/10.1080/07366299.2021.2016935","url":null,"abstract":"ABSTRACT In this paper, three bis-triamide extractants L1, L2 and L3 containing two tertiary amines groups and six amide groups were synthesized and the effects of contact time, HNO3 concentration, salts, different acids on the extraction behavior of Re(VII) were studied in the kerosene-HNO3 system. The results established that the extraction kinetics allow the system to reach equilibrium within 2 minutes. When HNO3 is 1.0 × 10–2 mol/L and the concentration of L is 1.0 × 10–2 mol/L, the DRe of L1 and L2 for the extraction of Re(VII) are 28.9, 47.3, respectively. The increase of NaNO3 and NaClO4 concentration will lead to the decrease of D Re, and the inhibition by NaClO4 is more significant. Among the three acid systems (HNO3, HCl, H2SO4), HNO3 had the most obvious inhibition on extraction of Re(VII) because NO3 − has the largest standard Gibbs hydration energy value (ΔGh°) among three anions. L3 could extract Re(VII) selectively from Re(VII)/U(VI) solution, the SF Re/U of L3 is 1.06 × 103 when the concentration of L3 and HNO3 are both 1.0 × 10–2 mol/L. According to slope method and extraction capacity analysis, the extraction compound is composed of one bis-triamide molecule and one ReO4 – ion, and thermodynamic studies showed that the extraction reaction is an endothermic and spontaneous process.","PeriodicalId":22002,"journal":{"name":"Solvent Extraction and Ion Exchange","volume":"40 1","pages":"571 - 589"},"PeriodicalIF":2.0,"publicationDate":"2021-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43751865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Hydrodynamic Behavior Analysis of Agitated-Pulsed Column by CFD-PBM CFD-PBM搅拌脉冲柱水动力特性分析

IF 2 4区化学

Solvent Extraction and Ion Exchange Pub Date : 2021-12-28 DOI: 10.1080/07366299.2021.2004660

Boren Tan, Baoqun Wang, Chao Chang, Yong Wang, S. Zheng, Tao Qi

引用次数: 2

Production of 230Pa as a Source for Medical Radionuclides 230U and 226Th Including Isolation by Liquid–liquid Extraction 医用放射性核素230U和226源230Pa的生产及液-液萃取分离

IF 2 4区化学

Solvent Extraction and Ion Exchange Pub Date : 2021-12-13 DOI: 10.1080/07366299.2022.2088059

A. Vasiliev, S. Ermolaev, E. Lapshina, M. Bravo, A. Skasyrskaya

引用次数: 1