The design and development of a water-soluble heterocyclic ligand are believed to be an alternative way for improving the separation efficiency actinides from lanthanides. Herein, we designed synthesized novel hydrophilic multidentate ligand: disulfonated N,N′-diphenyl-2,9-diamide-1,10-phenanthroline (DS-Ph-DAPhen) with soft hard donor atoms, as masking agent in aqueous solutions Am(III) separation. combination N,N,N′,N′-tetraoctyldiglycolamide kerosene DS-Ph-DAPhen phases could separate...

Although 1,10-phenanthroline-based ligands have recently shown vast opportunities for the separation of trivalent actinides (Ans(III)) from lanthanides (Lns(III)), optimization and design extractant structure based on phenanthroline framework remain hotspots further improving separation. Following strategy hard soft donor atom combination, first time, quinoline group was attached to 1,10-phenanthroline skeleton, giving a lipophilic ligand,...

Tetraalkyldiglycolamide (TRDGA) ligands have potential utilization for the separation of actinide and lanthanide ions in nuclear industry as chelates aqueous solution if water-soluble or extractants organic solvents water-insoluble. Here, a spectral titration method is extensively applied to investigating complexation fluorescent Sm(iii), Eu(iii), Tb(iii) with TRDGA solutions solvent extraction system. In using N,N,N',N'-tetramethyldiglycolamide (TMDGA, LI) chelate, three successive complex...

The complexation and selectivity of N,N-di(2-ethylhexyl)-diglycolamic acid (HDEHDGA/kerosene, HA) toward the light lanthanides, La(III), Ce(III), Pr(III), Nd(III), are presented for extraction from chloride media. In low pH region (pH 1.8-2.8), obtained data reveal that Ln(III) is governed by cation-exchange mechanism driven negative change in enthalpy. results slope analysis method suggest formation LnA3·(HA)1or2 process. As major extracted species with a core LnA3 first coordination...

Diglycolamide-based ligands have recently received increased attention due to their outstanding affinity for trivalent actinides and lanthanides. The structure optimization of the ligands, however, still remains a hot topic achieve better extraction performance. In this work, we prepare investigate three multidentate diglycolamide selective separation Eu(III) over Am(III) from nitric acid solution explore effect on alkyl groups nitrogen atoms in center BisDGA ligands. introduction ethyl or...

Due to the highly acidic and high-salinity nature of high-level radioactive waste liquid (HLLW), selective extraction TcO4- from HLLW remains be a challenging task. Traditional anion exchangers show low selectivity unsatisfactory performance due lack functional groups that can interact strongly with TcO4-. In this work, tailor-made binding site was constructed by decorating two acetamide on imidazolium cation fabricate new Tc separation material, which exhibits high selectivity. Unlike most...

Extraction of lanthanides and actinides from nitric acid solutions by using HDEHDGA as a neutral extractant instead carboxylate counter anion.

The presence of borate ions was confirmed experimentally and computationally, B 3 O (OH) 5 2− existing in aqueous solutions clearly solidified its Raman vibrational band at 612 cm −1 identified reported for the first time.

Uranium, as an energy source and radioactive waste, is very important in the nuclear fuel cycle. Recovery of uranium from waste solution essential for further treatment disposal. Herein, ionic liquid-functionalized porous aromatic framework material P–C4 (PPN-6-CH2P+(C4H9)3Cl–) adsorption alkaline was synthesized by grafting PPN-6 with quaternary phosphonium first time. The U-exchange kinetics perfectly conforms to pseudo-second-order dynamic model, which reveals chemical process. exhibits a...

A new graphene oxide (GO) model with reasonable functional group types and distribution modes was proposed by integrating potentiometric titrations ab initio calculations. Due to the complex synthesis mechanism, atomic structure of GO has been controversial for a long time. Here, we use density theory calculations mimic oxidation process, series fragments (GOFs) were deduced. pKa calculation method (RCDPKA) developed specifically in this work further used predict values fragments. Then,...

The Raman band at about 870 cm-1 originating from the symmetric stretch vibration (ν1) of uranyl, UO22+, has proven to be very informative for investigating complexation uranyl using perchlorate or nitrate known concentration as internal standards. can conveniently calculated by ratio directly read intensities and added reference, ClO4-, with a factor 1.72. While NO3- lower than 1.8 M 0.85 should used. Furthermore, standards, linear relationship between intensity corresponding species is...

99Tc is a radioactive fission product, mainly in the form of TcO4–, with good solubility and mobility environment. The development effective inexpensive materials to remove TcO4– from nuclear industry wastewater or contaminated water significant. Wood sawdust byproduct wood processing an abundant, low-cost, sustainable material. mesostructure consists numerous hollow cells that are joined endwise interconnected channel matrix capable rapid transfer ions. Imidazolium-functionalized (IM-WS)...

The IMI-P synthesized using a one-pot synthesis has good adsorption capacity and selectivity for TcO 4 − at pH 2–13, application prospects in nuclear industry wastewater treatment.

The extraction of Nd(III), Gd(III), and Er(III), which represent light, middle, heavy lanthanides, respectively, from chloride solutions has been carried out by using N,N-di(2-ethylhexyl)-diglycolamic acid (HDEHDGA, HA) diluted in kerosene as the organic phase. results slope analysis method indicate that Ln(III) with HDEHDGA is mainly governed cation-exchange reaction mechanisms low pH region (pH 1.2–2.7). obtained data reveal extracted species phase might be LnA3∙HA(1~2), consist a core 1:3...

O–N–O atom binding coordination provides a contrast example for the design of pyridine-based extractants separating An( iii ) from Ln( ).

The extraction of NpO2+ along with UO22+, Am3+, and Pu4+ from HNO3 solutions is achieved by using an asymmetrical N,N′-dimethyl-N,N′-dioctyl-diglycolamide (DMDODGA, L) as extractant. In contrast to symmetric tetraalkyl-diglycolamide ligands, such the well-studied N,N,N′,N′-tetraoctyl-diglycolamide (TODGA, L′) which fails catch NpO2+, DMDODGA exhibits considerably good ability extract neptunyl (V) well actinide ions other oxidation states solutions. extracted complex formed during in organic...

The complexation of neptunium(v) with carbonate has been studied at temperatures from 10 to 70 °C in 0.1 M LiClO4 by spectrophotometry. Three NpO2(+)-CO3(2-) complex species, NpO2(CO3)n((2n-1)-) (n = 1, 2, 3), are identified and the stability constants calculated using absorption spectra near-IR region collected titrations varying temperatures. enthalpies entropies van't Hoff equations temperature range °C, indicating that formation all complexes is mainly entropy driven. structures species...

Glutarimidedioxime favors 1 : 2 neutral uranyl complex species, whereas succinimidedioxime tends to form a cross-linked binuclear with ions.

Mitochondrial heterogeneity is the presence of two or more types mitochondrial (mt)DNA in same individual/tissue/cell. It closely related to animal health and disease. ND2 a protein-coding gene mtDNA, which participates respiratory chain oxidative phosphorylation. In previous studies, we observed that mt.A5703T mt.T5727G sites were heteroplasmic variation sites. We used pyrophosphate sequencing technology examine chicken gene, different tissues at development stages chickens. also...

The complexation of uranium(VI) [U(VI)] with dipicolinic acid was revisited respect to the missing protonated complex species existing in acidic solutions. For first time, presence complex, UO2HL+, aqueous solutions confirmed and stability constant determined by fluorescence spectroscopy. Considering species, which previous investigations, overestimated constants two known complexes, UO2L UO2L22-, were carefully reevaluated potentiometry using...