样式: 排序: IF: - GO 导出 标记为已读
-
Covalently Immobilized EDTA onto Graphene Oxide Using Ethylene Diamine as a Crosslinker for Cu(II), Pb(II), and Zn(II) Sorption Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2024-03-04 Ahlam Al-Shamakhi, Bushra Al-Wahaibi, Syeda Naheed F. Ali, El-Said I. El-Shafey
This study introduces a novel method of EDTA immobilization onto graphene oxide (GO) using ethylene diamine as a crosslinker for heavy metal removal. GO was prepared from graphite via a modified Hu...
-
Separation of 241Am3+ from 154Eu3+ Using 3,3’-Butyloxy-Bis-1,2,4-Triazinyl-2,6-Pyridine as a Potent Receptor Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2024-02-26 Lesta S. Fletcher, Mariah L. Tedder, Samiat O. Olayiwola, Dale D. Ensor, Jesse D. Carrick
The effective partitioning and transmutation of the minor An from the Ln in spent nuclear fuel in a non-proliferative manner is critical to lowering potential impact to the environment, moderating ...
-
Optimal Extraction and Separation of Europium and Samarium from Nitrate Medium Using Binary Mixture of Cyanex 572 and Tertiary Amine Extractants Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2024-02-12 Soad E. Rizk, Rasha Gamal, Naglaa E. El-Hefny
Extraction and separation of rare-earth elements (Eu(III) and Sm(III)) from nitrate solutions were studied using Cyanex 572 and Alamine 336 type extractants, as well as their binary mixtures in ker...
-
Experimental Studies on Two-Phase Flow with a Novel Slotted Plate Internal in an Air Pulsed Column Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2024-02-12 Anshuman Sharma, Nirvik Sen, Sourav Sarkar, K. K. Singh, P. S. Sarkar, K. T. Shenoy
A novel air pulsed column plate internal featuring plates having concentric circular slots of fixed width (3 mm) is conceptualized, tested, and compared against standard sieve plate internal for co...
-
Triethanolamine Based Deep Eutectic Solvent as Green Extracting Agent for Isolation of Cardanol from Cashew Nut Shell Liquid Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2024-02-12 Vichitra Malaiyarasan, Anantharaj Ramalingam
In this study, triethanolamine (TEA) with choline chloride (ChCl) based deep eutectic solvent (DES) at different mole ratios was prepared. Density at different temperatures (293.15 K to 343.15 K) a...
-
Generalized Pitzer-Debye-Hückel (PDH) Framework for the Deep Eutectic Solvent Assisted Extraction of Europium (III), Americium (III), and Uranium (VI) Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2024-02-12 Dev K. Patra, Aradhana V. Thombre, Debashis Kundu
This study focuses on modeling of deep eutectic solvents (DESs) assisted liquid-liquid-extraction of Am(III), U(VI), Eu(III). In the present work, DESs are having tri – n octyl phosphine oxide (TOP...
-
Relationship Between Extraction of Arsenic via Ion Solvation and Hansen Solubility Parameters of Extractants Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-10-31 Naoki Matsuo, Kaoru Ohe, Tatsuya Oshima, Kazuharu Yoshizuka
Extraction of As(III) from hydrochloric acid solution using various solvents on the basis of ion solvation has been reported, but a theoretical framework to describe the suitability of solvents for...
-
Removal of Mercury Ions from Aqueous Solutions Using Dithiooxamide-Glutaraldehyde Resin Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-10-31 Dina Tolan, Amr Heniesh, Mohamed Ismael, Emad Elshehy, Norah Faihan Alqahtani, Waleed A. El-Said, Ahmed El-Nahas, Ayman El-Sawaf
This work has been performed to synthesize a new dithiooxamide/glutaraldehyde resin (R-DTGA) polymer, and to determine the adsorption behavior as well as the adsorption kinetics of the reaction of ...
-
An Integrated Model Combining Mass Transfer and Chemical Reaction for Co-Decontamination Extraction Step of PUREX Process in a Pulsed Extraction Column Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-09-05 Ruihan Yan, Yang Gao, Yu Zhou, Qiang Zhao, Hongguo Hou, Meng Zhang
The accurate prediction of the extraction behaviors of various solutes in PUREX reprocessing process is crucial for the operation and implementation of the actual process. In this paper, an integra...
-
Triflimide Effect in Solvent Extraction of Rare-Earth Elements from Nitric Acid Solutions by TODGA Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-08-30 Alexander N. Turanov, Vasilii K. Karandashev
Outer-sphere interactions play an important role in the liquid-liquid extraction and separation of metal ions and they could be used to tune the efficiency and selectivity of recovery. Here, we rep...
-
Synergistic Extraction of Lanthanides(III) from Acidic Aqueous Solutions with Mixtures of Bis(Diphenylcarbamoylmethylphosphine Oxide) Ligands and Dinonylnaphtalene Sulfonic Acid Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-08-28 Alexander Turanov, Vasilii Karandashev
The extraction of lanthanides(III) from aqueous nitric acid solutions with mixtures of bis(diphenylcarbamoylmethylphosphine oxides) (L) and dinonylnaphthalene sulfonic acid (HDNNS) in organic dilue...
-
Combining a Lipophilic Phenanthroline Carboxamide and a Hydrophilic Diglycolamide to Increase the Separation Factors of Adjacent Light Lanthanides Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-08-24 Marie Simonnet, Yuji Sasaki, Tsuyoshi Yaita
The combination of two neutral CHON reagents, a lipophilic phenanthroline dicarboxamide and a hydrophilic diglycolamide, resulted in a synergistic separation of adjacent light lanthanides in nitrat...
-
In Memoriam, Douglas Flett, 1936–2023 Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-08-13 Olga Logutenko, Igor Fleitlikh
Published in Solvent Extraction and Ion Exchange (Vol. 41, No. 6, 2023)
-
Design of a Modular Annular Centrifugal Contactor for Lab-Scale Counter-Current Multistage Solvent Extraction Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-08-01 Dominic Maertens, Koen Binnemans, Thomas Cardinaels
Annular centrifugal contactors (ACCs) have appealing properties as counter-current multistage solvent extraction (SX) equipment, allowing high throughput at short residence times, small liquid hold...
-
Investigation of f-Element Interactions with Functionalized Diamides of Phenanthroline-Based Ligands Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-07-28 Emma M. Archer, Shane S. Galley, Jessica A. Jackson, Jenifer C. Shafer
Separations relevant to trivalent actinides and lanthanides have been a focus of the f-element community in the past few decades. A central focus of this effort has been optimizing ligands for sepa...
-
Selective Extraction of Cu (II) Using Novel C=O–NOH-Contained Compound-Dodecyl Phenyl Ethyl Hydroxamic Acid and Its Extraction Mechanism Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-07-25 Dong Cao, Shuai Wang, Xin Ma, Jia Yang, Hong Zhong
Herein, a novel C=O–NOH-contained compound was synthesized and used in the extraction and recovery of copper from sulfate solution. Dodecyl phenyl ethyl hydroxamic acid (DPEHA) exhibited high selec...
-
Reliable Identification of Relevant Factors for the Reactive Extraction of Succinic Acid from Electrolyte Containing Solutions Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-07-24 Marcel Gausmann, Diana Wall, Andreas Jupke
Reactive extraction of succinic acid by tertiary amines is an effective separation technique. Its potential application for the initial recovery of bio-based succinic acid from fermentation broth. ...
-
Gamma Radiolysis of Phenyl-Substituted TODGAs: Part II Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-07-06 Christopher A. Zarzana, Jack McAlpine, Andreas Wilden, Michelle Hupert, Andrea Stärk, Mudassir Iqbal, Willem Verboom, Aspen N. Vandevender, Bruce J. Mincher, Gary S. Groenewold, Giuseppe Modolo
ABSTRACT The radiolytic degradation chemistry of three phenylated analogs of N,N,N’,N’-tetraoctyl diglycolamide (TODGA) was investigated: 2-(2-(di-n-octylamino)-2-oxoethoxy)-N,N-di-n-octyl-2-phenylacetamide (PhTODGA), which has a phenyl substituent bound to a central methylene, 2-(2-(di-n-octylamino)-2-oxo-1-phenylethoxy)-N,N-di-n-octylpropanamide (PhMeTODGA), which also contains a methyl substituent
-
Gamma Radiolysis of Phenyl-Substituted TODGAs: Part I Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-07-06 Christopher A. Zarzana, Jack McAlpine, Andreas Wilden, Michelle Hupert, Andrea Stärk, Mudassir Iqbal, Willem Verboom, Bruce J. Mincher, Gary S. Groenewold, Giuseppe Modolo
ABSTRACT The radiolytic stabilities of three phenylated analogs of N,N,N’,N’-tetraoctyl diglycolamide (TODGA) were investigated: 2-(2-(di-n-octylamino)-2-oxoethoxy)-N,N-di-n-octyl-2-phenylacetamide (PhTODGA), which has a phenyl substituent bound to a central methylene, 2-(2-(di-n-octylamino)-2-oxo-1-phenylethoxy)-N,N-di-n-octylpropanamide (PhMeTODGA), which also contains a methyl substituent bound
-
Selective Separation of Zr(IV) from Simulated High-Level Liquid Wastes by Zeolites Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-07-04 Yifu Hu, Wenfeng Hao, Wentao Wang, Ye Zhang, Qi Chen, Wenfu Yan, Taihong Yan
Effectively separating Zr(IV) from strong acidic and radioactive solutions is crucial for spent fuel reprocessing plants, but it remains a challenging task. This study investigated the adsorption o...
-
A Comparison Between Trioctylamine (TOA) and Tris(2-Ethylhexyl) Amine (TEHA) in Solvent Extraction of Sulfuric Acid* Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-06-21 Aidin Heidari, Shahryar Shahini, Davoud Haghshenas Fatmehsari, Eskandar Keshavarz Alamdari
The study investigated the behavior of two amines, Trioctylamine (TOA) and Tris(2-Ethylhexyl) amine (TEHA), in the sulfuric acid extraction system, with varying concentrations of extractants and mo...
-
Adsorptive Removal of Selenium(IV) from Aqueous Solution by Ferrous Hydroxide Complex-Zero Nickel Composites Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-05-31 Yanjun Du, Qing Zhou, Jiankun Zhao, Hexi Wu, Xiaoyan Li, Yibao Liu, Zhanggao Le
ABSTRACT Nanoscale ferrous hydroxide complex-zero nickel composites (FHC/Ni0) were fabricated by ball milling method for Se(IV) adsorption from aqueous solution. The effects of pH, solid-liquid ratio, time, temperature, initial concentration of Se(IV) on the adsorption of Se(IV) by FHC/Ni0 were investigated. FHC/Ni0 was characterized by SEM, XPS, XRD, FT-IR, BET and Zeta potential, and the mechanism
-
CFD Analysis of Simultaneous Removal of Copper (II) and Zinc from Aqueous Solution Using a Hollow Fiber Membrane Contactor Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-05-26 Borhan Pourtalebi, Mohammad Valibeknejad, S. Majid Abdoli, Ali Akbari
ABSTRACT The current study is a new method for liquid–liquid extraction of copper (II) and zinc that was carried out using an efficient solvent called trifluoroacetylacetone in a hollow fiber membrane contactor (HFMC). To analyze the extraction process and understand its underlying mechanisms, computational fluid dynamics (CFD) was employed. The extraction was performed in three domains by coupling
-
Extraction of Neptunium, Plutonium, Americium, Zirconium, and Technetium by Di-(2-Ethylhexyl)-Iso-Butyramide (DEHiBA) at High Metal Loadings Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-05-26 Gabriel B. Hall, Nathan P. Bessen, Peter R. Zalupski, Emily L. Campbell, Travis S. Grimes, Dean R. Peterman, Gregg J. Lumetta
ABSTRACT Increased focus on carbon neutral energy has generated a resurgence of interest in nuclear power, and in particular advanced reactors which are likely to utilize high assay low enriched uranium (HALEU). This in turn could increase the economic attractiveness of recovering still partially enriched uranium from used nuclear fuel. Concomitant to development of advanced reactors, advanced reprocessing
-
Solvent Extraction and Complexation Studies of Pyridine-di-Phosphonates with Lanthanides(III) in Solutions Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-05-19 Ekaterina A. Konopkina, Petr I. Matveev, Anastasia V. Kharcheva, Tsagana B. Sumynova, Anton S. Pozdeev, Daniil A. Novichkov, Alexander L. Trigub, Paulina Kalle, Anna A. Kirsanova, Stepan N. Kalmykov, Vladimir G. Petrov, Nataliya E. Borisova
ABSTRACT In this work, we studied the complex formation (1H, 31P NMR-titration, UV–vis titration, luminescent titration) and solvent extraction of lanthanides with pyridine diphosphonates. The stoichiometry of the complexes was determined: ML and ML2 forms are present. This is confirmed by all of the above methods. It was found that the pyridine ring and P=O groups are involved in the coordination
-
Solvent Extraction, Sequential Separation and Trace Determination of La (III), Ce (III), Nd (III) and Gd (III) with 2, 14-bis[m-nitrophenyl]-Calix[4]Resorcinarene-8, 20-bis[N- phenylbenzo]-dihydroxamic Acid Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-05-16 C. R. Sharma, R. N. Patadia, Y. K. Agrawal
ABSTRACT A novel reagent 2,14-bis[m-nitrophenyl]-calix[4]resorcinarene-8,20-bis[N-phenylbenzo]-dihydroxamic acid (NPC4RADHA) is reported for the liquid-liquid extraction, separation, and simultaneous trace determination of La(III), Ce(III), Nd(III), and Gd(III). The method involves optimizing various parameters such as the concentration of NPC4RADHA, pH, solvent, and extraction time to achieve maximum
-
Characterization of a Set of Improved, CMPO-Based, Extraction Chromatographic Resins: Applications to the Separation of Elements Important for Geochemical and Environmental Studies Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-05-15 Christian Pin, Jean-Luc Piro
ABSTRACT This article describes several extraction chromatographic materials aiming to offer improved potential for isolating trace elements with high charge/ionic radius ratio from accompanying matrix elements in natural samples. Starting with commercially available, field-proven, TRU- and RE-Spec materials (Eichrom Technologies), three resins containing less TBP in the CMPO-TBP mixtures, or even
-
Recovery of Lithium from Simulated Nanofiltration-Treated Seawater Desalination Brine Using Solvent Extraction and Selective Precipitation Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-05-11 Stijn Raiguel, Viet Tu Nguyen, Isadora Reis Rodrigues, Clio Deferm, Sofía Riaño, Koen Binnemans
ABSTRACT The world's seas and oceans contain vast amounts of lithium, but the low concentration hereof renders solvent extraction impractical for its recovery. By contrast, seawater desalination brine, after treatment by nanofiltration, contains a roughly tenfold greater concentration of lithium than raw seawater. Hence, lithium can be effectively recovered from such streams using solvent extaction
-
Ditopic Extractants to Separate Palladium(II) and Platinum(IV) Chloridometalates via Inner or Outer Sphere Binding Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-05-08 A. Matthew Wilson, Richard A. Grant, Ross J. Gordon, Jason B. Love, Carole A. Morrison, Kirstian J. Macruary, Gary S. Nichol, Peter A. Tasker
ABSTRACT New thioetheramide ligands (L, PhS(CH2)nCONRR’) co-extract Pd(II) and Pt(IV) from acidic chloride solutions. The Pd is transferred to a water-immiscible phase as a [Pd(L)2Cl2] complex with thioether groups in the inner sphere whilst Pt is extracted in an outer-sphere assembly, [(LH)2·PtCl6], containing protonated reagent molecules LH+ that charge-balance the chloridoplatinate dianion, [PtCl6]2-
-
Optimization of Cesium Ion Exchange Performance with Hanford Tank Waste Feed Dilution Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-05-08 Amy Westesen, Emily Campbell, Reid Peterson
ABSTRACT Crystalline silicotitanate (CST) ion exchanger is currently used to remove cesium (137Cs) from the aqueous phase of Hanford tank wastes in preparation for vitrification at the Waste Treatment and Immobilization Plant (WTP). The CST is a non-elutable inorganic ion exchanger targeted to maintain a decontamination factor of ≥1,000 prior to the column effluent reaching a waste acceptance criterion
-
Low and High LET Degradation Studies of Metal-Loaded Organic Phase Ligands in the ALSEP Process Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-04-26 Christian G. Bustillos, Randy O. Ngelale, Mikael Nilsson
ABSTRACT Organic solutions comprising the Actinide Lanthanide Separation Process (ALSEP) solvent consisting of 0.5 M 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (HEH[EHP]) and 0.05 M N,N,N’,N’-tetra(2-ethylhexyl)diglycolamide (T2EHDGA) in n-dodecane were subjected to low LET and high LET irradiation before and after equilibration with an aqueous phase of 3 M HNO3. Degradation dose constants
-
Indium Extraction from Sulfate Solutions with a Mixture of Di(2-Ethylhexyl)Phosphoric Acid and Octyl Alcohol Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-04-10 Isaac Fleitlikh, Natalya Grigorieva, Alexey Tikhonov, Vyacheslav Krasnov, Elena Karpova, Olga Logutenko
ABSTRACT In this work, solvent extraction of In(III) from sulfate solutions by using mixtures of D2EHPA with octyl alcohol and octanoic acid was investigated. The introduction of the additives into the organic phase was shown to lead to an antagonistic effect thus facilitating efficient indium stripping from the loaded organic phase. The antagonistic effect is significantly higher in the D2EHPA (HR)
-
Synergistic Solvent Extraction of Erbium(III) using a Mixture of Neodecanoic Acid with 1-(2-Neononylamidoethyl)-2-Neononyl-2-Imidazoline Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-04-09 Svetlana Bondareva, Yury Murinov
ABSTRACT The solvent extraction of erbium(III), representing heavy lanthanides, from nitrate solutions has been studied using a novel mixture of neodecanoic acid (HA) with 1-(2-neononylamidoethyl)-2-neononyl-2-imidazoline (L) in toluene with 15 % (v/v) of n-decanol. The synergistic extraction of erbium(III) has been found in the equilibrium pH range from 6.0 to 6.5. The effects of the equilibration
-
Comparison of Cyclic Irradiation Behavior of Tri-Butyl Phosphate / Tri-Iso-Amyl Phosphate-Dodecane System in Nitric Acid Medium Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-04-05 Satyabrata Mishra, N. Desigan, K. A. Venkatesan, K. Ananthasivan
ABSTRACT The degradation behavior of gamma irradiated solution of 1.1 M tri-butyl phosphate (TBP) in n-dodecane (n-DD) and 1.1 M tri-iso-amyl phosphate (TiAP) in n-DD loaded with nitric acid and uranium were compared up to 5 cycles upon recycling of the degraded solvent after 80 kGy in each cycle. The solvent was recycled by stripping the loaded metal with dilute nitric acid followed by alkali wash
-
Selective Separation of 4,4’-Methylenedianiline, Isophoronediamine and 2,4-Toluenediamine from Enzymatic Hydrolysis Solutions of Polyurethane Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-04-03 Jörg Eberz, Moritz Doeker, Yannic S. Ackermann, Dominik Schaffeld, Nick Wierckx, Andreas Jupke
ABSTRACT The recycling of plastics such as polyurethane (PU) is a current challenge. The continuously increasing production volume and additionally growing end-of-life streams increase the urgency for solutions. Conventional recycling methods such as mechanical and chemical recycling are only economically and/or ecologically suitable to a limited extent. The three-step approach consisting of enzymatic
-
Fluorinated Diluents- A Review Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-03-23 V. Babain, M. Alyapyshev, C. Ekberg, T. Todd
ABSTRACT The history of the development of fluorinated compounds as potential diluents in solvent extraction processes is described. Fluorinated diluents were first investigated in the former Soviet Union and later in the United States and Europe. Fluorinated diluents represent a class of compounds that can be used as primary diluents or as phase modifiers. They are of particular utility when extractant
-
Investigation on the Sulfadiazine Schiff Base Adsorption Ability of Y(III) Ions from Nitrate Solutions, Kinetics, and Thermodynamic Studies Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-03-14 Amal E. Mubark, Samar E. Abd-El Razek, Ahmed A. Eliwa, Sabreen M. El-Gamasy
ABSTRACT Sulfadiazine Schiff base (SDSB) was prepared using an inexpensive technique by modification of sulfadiazine drug (SD) to be used as an adsorbent material for recovery of Y(III) ions from aqueous solutions. Chemical and physical characterizations of SDSB were performed using different techniques. The maximum static adsorption capacity of the modified SD was 0.9 mmolg−1 for Y(III) ions and at
-
Selective Removal of Transient Metal Ions from Acid Mine Drainage and the Possibility of Metallic Copper Recovery with Electrolysis Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-03-06 Jelena Toropitsyna, Luděk Jelinek, Ross Wilson, Martin Paidar
ABSTRACT The low pH and high salinity of acid mine drainage (AMD) fundamentally complicates the sorption processes. We explored the selective removal of Cu, Ni and Co ions present in AMD from the excess of ferrous ions of using a chelating resins Lewatit® MonoPlus TP 220 and Lewatit® TP 208. Also, the recovery of metal copper from desorption solution using electrolysis was investigated. The results
-
Selective Solvent Extraction of Vanadium Over Chromium from Alkaline Leaching Solution of Vanadium Slag by D2EHPA/TBP Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-02-28 Lili Cui, Jungang Cao, Shihui Jiao, Guangsheng Pang, Zhonglin Wei
ABSTRACT A selective extraction process for recovering vanadium (IV) over chromium was proposed with use of a mixed extractant consisting of di(2-ethylhexyl) phosphate (D2EHPA) and tri-n-butyl phosphate (TBP). The influence of various factors, which included the initial aqueous pH value, the concentration of leach solution and D2EHPA, phase ratio (O/A), extraction equilibrium time and extraction temperature
-
Elimination of the Interfacial Crud in the Extraction of Simulated High-Level Liquid Waste After Denitration in the TRPO Process Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-02-22 Zhaofei Zhang, Wuhua Duan, Xinwei Cheng, Wenbing Li, Jing Chen, Jianchen Wang, Taoxiang Sun
ABSTRACT Denitration is a proven technique that can reduce the nitric acid concentration of high-level liquid waste (HLLW) to meet the aqueous acidity requirement of the TRPO (TriAlkyl Phosphine Oxide) process. However, interfacial crud is generated in the TRPO extraction of the HLLW after denitration. In this work, the interfacial crud was characterized by Fourier-transform infrared spectroscopy and
-
A Novel Type of Tetradentate Dipyridyl-Derived Bis(pyrazole) Ligands for Highly Efficient and Selective Extraction of Am3+ Over Eu3+ From HNO3 Solution Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-02-15 Lianjun Song, Xueyu Wang, Long Li, Zhuang Wang, Lanlan He, Qiuju Li, Qingjiang Pan, Songdong Ding
ABSTRACT The extraction of Am3+ and Eu3+ with 6,6’-bis(5-alkyl-1H-pyrazol-3-yl)-2,2’-bipyridine (BPzBPy, alkyl = i-Bu, n-Bu, n-Oct) from HNO3 medium and the complexation of BPzBPy with Eu3+ were investigated. By using meta-nitrobenzotrifluoride (F-3) as a diluent, iBu-BPzBPy ligand in combination with 2-bromohexanoic acid was able to extract Am3+ over Eu3+ with the nature of significantly high efficiency
-
Recycling of Li-Ion Batteries from Industrial Processing: Upscaled Hydrometallurgical Treatment and Recovery of High Purity Manganese by Solvent Extraction Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-01-31 Nathália Vieceli, Claudia Vonderstein, Thomas Swiontekc, Srecko Stopić, Christian Dertmann, Reiner Sojka, Niclas Reinhardt, Christian Ekberg, Bernd Friedrich, Martina Petranikova
ABSTRACT Manganese plays a central role in lithium-ion batteries (LIBs) but its recycling is rarely addressed when compared to other valuable metals present in LIBs, such as Co and Ni. Thus, the main goal of this work was to study and achieve the separation of Mn from Co and Ni by solvent extraction from a leachate obtained from LIBs using hydrochloric acid in an upscaled reactor, which is an innovative
-
Highly Efficient Pertraction of Tetravalent Neptunium Ions Across a Flat Sheet Supported Liquid Membrane Containing Two Different Aza-Crown Ether-Based Multiple Diglycolamide Ligands Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-01-25 Bholanath Mahanty, Prasanta K. Mohapatra, Richard J. M. Egberink, Jurriaan Huskens, Willem Verboom
ABSTRACT Pertraction of Np(IV) across a PTFE membrane containing two different aza-crown ether-based multiple diglycolamide (DGA) ligands termed as LI (3 DGA arms) or LII (4 DGA arms) was investigated using nitric acid as feed solution. A few of the studies were also carried out with Pu(IV) for comparison purposes. The kinetics of the extraction of Np(IV) and Pu(IV) was fast at 3 M HNO3 and within
-
Deuterated Malonamide Synthesis for Fundamental Research on Solvent Extraction Systems Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-01-23 Cyril Micheau, Yuki Ueda, Kazuhiro Akutsu-Suyama, Damien Bourgeois, Ryuhei Motokawa
ABSTRACT Malonamide derivatives, which are the most extensively investigated extractants for solvent extraction of lanthanides, actinides, and platinum group metal ions, were deuterated by using Pd/C and Rh/C catalysts in a D2O/2-propanol mixture. This method replaces 1H atoms in the malonamides with 2H atoms at a controllable deuteration rate. The maximum rate reached about 75%, determined by nuclear
-
Solvent Phase Optimizations Improve Correlations with Experimental Stability Constants for Aqueous Lanthanide Complexes Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2023-01-06 Andrés García Alejo, Nuwan De Silva, Yichen Liu, Theresa L. Windus, Marilú Pérez García
ABSTRACT Stability constants provide insight into ion complexation in water. While computational studies have been shown to model the energy of the complexation successfully using a thermodynamic cycle approach, it does not extend to calculating the stability constants for 1:1 lanthanide to ligand complexes in solution. Using B3LYP and 6-31+G* Pople basis with small core effective core potential (ECP)
-
Experimental Test of a Process Upset in the EURO-GANEX Process and Spectroscopic Study of the Product Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2022-11-23 M. J. Carrott, C. J. Maher, C. Mason, M. J. Sarsfield, D. Whittaker, R. J. Taylor
ABSTRACT EURO-GANEX is an innovative hydrometallurgical process for the group separation of transuranic actinides from future spent nuclear fuels. A flowsheet test of a process upset (or ‘maloperation’) has been carried out involving the reduction in the concentration of the scrub acid feed to the extract-scrub contactors. The experimental test was completed in two stages. First, the extract-scrub
-
Solvent Optimization Studies for a New EURO-GANEX Process with 2,2’-Oxybis(N,N-di-n-decylpropanamide) (mTDDGA) and Its Radiolysis Products Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2022-10-03 Bart Verlinden, Andreas Wilden, Karen Van Hecke, Richard J. M. Egberink, Jurriaan Huskens, Willem Verboom, Michelle Hupert, Patrik Weßling, Andreas Geist, Petra J. Panak, Rainier Hermans, Marc Verwerft, Giuseppe Modolo, Koen Binnemans, Thomas Cardinaels
ABSTRACT The diglycolamide 2,2’-oxybis(N,N-di-n-decylpropanamide) (mTDDGA) is being studied as an extractant for actinides and lanthanides in the European Grouped Actinide Extraction (EURO-GANEX) process. The aim is the development of a more simplified process using a single extractant instead of a mixture of extractants used in the current EURO-GANEX process. This work presents solvent optimization
-
Investigation of the Extraction of Natural Alkaloids in Karr Reciprocating Plate Columns: Mass Transfer Study Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2022-09-19 Yue Wu, Jessica Vovers, Hiep Thuan Lu, Wen Li, Geoffrey W. Stevens, Kathryn A. Mumford
ABSTRACT Solvent extraction plays a vital role in manufacturing high purity alkaloids from natural poppies. Cyanex® 923, which has been widely used in hydrometallurgical processes, is shown to be an effective extractant for natural alkaloid extraction. In this work, 0.2 M Cyanex® 923 in xylene (dispersed phase) was used to investigate the equilibrium isotherm of morphine at pH 9 and morphine extraction
-
Extraction of Cesium, Strontium, and Stable Simulated HLW Components with Substituted Crown Ethers in New Fluorinated Diluents Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2022-09-07 I.V. Smirnov, M.D. Karavan, E.V. Kenf, L.I. Tkachenko, V.V. Timoshenko, A.A. Brechalov, T.V. Maltseva, Yu.E. Ermolenko
ABSTRACT The extraction of cesium, strontium, and a number of stable components of simulated high-level waste solutions from nitric acid media with solutions of crown ether derivatives in new fluorinated diluents was studied. Based on the data on the solubility of the extractants into the aqueous phase and the physicochemical properties of the diluents used, the most promising extraction systems were
-
Separation of Phycobiliprotein from Nostoc Commune by Using Ion-Exchange Membrane with Quaternary Amine Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2022-09-05 Takanori Hidane, Tomohiro Fukui, Mikihide Demura, Shintaro Morisada, Keisuke Ohto, Hidetaka Kawakita
ABSTRACT Phycobiliprotein (PB), which is produced by cyanobacteria, has potential applications as a valuable pharmaceutical product. In this study, PB was separated by using a nonwoven-fabric membrane (Rx-1) that contained quaternary amino groups. PB was extracted from a Nostoc commune, which is a type of microalga, by disrupting the cell walls by a freeze–thaw method. Two types of biomolecules, namely
-
Extraction of Gold from the Leachate of Copper Anode Slime by Quaternary Ammonium Rice Husk Lignin Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2022-08-30 Baoping Zhang, Yin Wang, Guo Lin, Heng Zhang
ABSTRACT Extraction of gold by adsorption is being concerned because of easy operation, low cost and non-pollution for the present. Lignin and its derivatives are considered to be the most promising adsorbent due to abundance and environmental friendliness. In this work, gold was extracted from the leachate of copper anode slime by quaternary ammonium rice husk lignin (QARHL). QARHL was synthesized
-
Development of Chemical Procedures for Isotope Harvesting: Separation of Trace Hafnium from Tungsten Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2022-06-21 Kelly N. Kmak, John D. Despotopulos, Nicholas D. Scielzo
ABSTRACT The separation of trace hafnium from bulk tungsten alloys is of interest for isotope harvesting at the National Superconducting Cyclotron Laboratory and the Facility for Rare Ion Beams because 172Hf, the parent of 172Lu, accumulates in tungsten alloy beam blockers at these facilities. In this work, a procedure for the separation of trace hafnium from a bulk tungsten alloy (454 g) was established
-
Production of 230Pa as a Source for Medical Radionuclides 230U and 226Th Including Isolation by Liquid–liquid Extraction Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2022-06-15 A. N. Vasiliev, S.V. Ermolaev, E. V. Lapshina, M. G. Bravo, A. K. Skasyrskaya
ABSTRACT Liquid–liquid extraction of protactinium with different extractants (1-octanol, MIBK, aliquat 336) was studied depending on concentration of nitric and hydrochloric acids, presence of bulk amount of thorium, fluoride ions, and addition of boric acid or Al3+ ions as a masking agent. The extraction with 1-octanol followed by back-extraction with 7 M HCl + 0.1 M HF solution proved to be appropriate
-
Liquid–Liquid Extraction and Supported Liquid Membrane Transport of Neptunium(IV) Across a Flat-Sheet Supported Liquid Membrane Containing a TREN-DGA Derivative Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2022-05-29 Bholanath Mahanty, Prasanta K. Mohapatra, Andrea Leoncini, Jurriaan Huskens, Willem Verboom
ABSTRACT Liquid–liquid extraction and liquid membrane transport behavior of tetravalent actinide ions viz. Th(IV), Np(IV), and Pu(IV) were investigated for the first time using a diglycolamide (DGA) based dendrimer with a tris(2-aminoethyl)amine (TREN) scaffold as the organic extractant. The generation of 1 dendrimer with six DGA pendent moieties (termed as TREN-G1-DenDGA) extracted Np(IV) more effectively
-
Liquid Hold-up Volume and Phase Ratio (A/O) of HNO3–DtBuCH18C6/n-Octanol System in an Annular Centrifugal Extractor Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2022-04-20 Quanduo Miao, Taoxiang Sun, Honglin Chen, Qiang Zheng, Wuhua Duan, Jianchen Wang, Jing Chen
ABSTRACT The crown ether strontium extraction (CESE) process has been developed for the recovery or removal of Sr from acidic high-level liquid waste (HLLW) in China, where the extractant is 4’,4”(5”)-di-(tert-butyldicyclohexano)-18-crown-6 (DtBuCH18C6) and the diluent is n-octanol. When the CESE process was operated in annular centrifugal extractors (ACEs) for demonstration by cold and hot tests,
-
Separation of Americium from a Complex Matrix by Solvent Extraction Using CyMe4BTPhen in a Room Temperature Ionic Liquid Diluent Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2022-03-10 Joe Mahmoud, Matthew Higginson, Paul Thompson, Francis Livens, Scott L. Heath
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
-
Characterization of the ALSEP Process: Investigating Equilibrium and Intermediate Complexes of the Scrub Stage Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2022-02-24 Gabriela A. Picayo, Brian D. Etz, Madeleine A. Eddy, Shubham Vyas, Mark P. Jensen
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
-
Recent Progress on the Structure-Performance Relationship between Diglycolamide Extractants and f-Elements Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2022-02-21 Zhibin Liu, Huibo Li, Yaoyang Liu, Chuang Zhao, Caishan Jiao, Yu Zhou, Meng Zhang, Yang Gao
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
-
Extraction of Ln(III) and An(III) by N,N-di(2-ethylhexyl)- thio-diglycolamic Acid Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2022-02-03 Chang Jin, Qian Liu, Yu Du, Chao Xu, Tingting Liu, Tuo Fang, Ganlin Wang, Liyang Zhu, Yan Zhang, Suliang Yang, Guoxin Tian
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
-
Mutual Separation of Ln and an Using TODGA and DTBA with High Organic Acid Concentrations Solvent Extr. Ion Exc. (IF 2.0) Pub Date : 2022-01-10 Yuji Sasaki, Masashi Kaneko, Masahiko Matsumiya, Masahiko Nakase, Kenji Takeshita
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,