Extraction mechanism and γ-radiation effect on the removal of Eu3+ by a novel BTPhen/[Cnmim][NTf2] system in the presence of nitric acid

RSC Advances ◽  
2014 ◽  
Vol 4 (85) ◽  
pp. 45612-45618 ◽  
Author(s):  
Hanyang Zhou ◽  
Yinyong Ao ◽  
Jie Yuan ◽  
Jing Peng ◽  
Jiuqiang Li ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Radiation Effect ◽  
Radiation Stability ◽  
Extraction System ◽  
High Radiation ◽  
Γ Radiation ◽  
Extraction Mechanism

The extraction mechanism of Eu3+ by using BTPhen/[Cnmim][NTf2] (n = 2, 4, 8) was investigated in the presence of nitric acid, and the new extraction system shows high radiation stability.

Extraction of tetra- and hexavalent actinide ions from nitric acid solutions using some diglycolamide functionalized calix[4]arenes

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Rajesh B. Gujar ◽  
Parveen K. Verma ◽  
Prasanta K. Mohapatra ◽  
Mudassir Iqbal ◽  
Jurriaan Huskens ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Solvent Extraction ◽  
Extraction Efficiency ◽  
Minor Actinide ◽  
Acid Solutions ◽  
Extraction Mechanism ◽  
Nitrate Ion ◽  
Nitric Acid Solutions ◽  
Actinide Ions ◽  
Acid Extractant

Abstract Neptunium is one of the most important minor actinide elements with some of its isotopes having very long half-lives, therefore necessitating its separation from acidic radioactive wastes. Solvent extraction of Np4+ and NpO2 2+ was studied using three multiple diglycolamide (DGA) extractants with n-propyl, n-octyl and 3-pentyl substituents termed as L I , L II and L III , respectively, in a mixed diluent of 5% isodecanol and 95% n-dodecane. For comparison purpose, the extraction of Pu4+ and UO2 2+ was carried out under identical conditions. The extraction efficiency of the ligands for the tetravalent ions followed the trend: L II  > L I  > L III , which changed to L III  > L II  > L I for the hexavalent ions. While the extraction of the tetravalent ions was reasonably good (ca. 90–98%) with an extremely low (5.0 × 10−5 M) ligand concentration, poor extraction (ca. 5–16%) of the hexavalent ions was seen even with a 20 times higher concentration of the ligand. In general, Pu4+ was better extracted than Np4+, while NpO2 2+ was marginally better extracted then UO2 2+. A ‘solvation’ type extraction mechanism was proposed based on the extraction profiles obtained as a function of the concentrations of the feed nitric acid, extractant as well as nitrate ion. The extracted species were found out to be M(NO3)4·mL and MO2(NO3)2·nL (M = Np or Pu, 1 < m < 2, n ≃ 1).

Materials and Photosensor Devices with High Radiation Stability

2015 ◽  
Vol 1117 ◽  
pp. 107-113 ◽  
Author(s):  
Ilariy Rarenko ◽  
Dmytro Korbutyak ◽  
Volodymyr Koshkin ◽  
Boris Danilchenko ◽  
Leonid Kosyachenko ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Metal Layer ◽  
Chemical Properties ◽  
Radiation Stability ◽  
Reactor Irradiation ◽  
High Concentration ◽  
High Radiation ◽  
Cubic Crystal ◽  
Impurity Atoms ◽  
Mixed Reactor

Semiconductor Hg3In2Te6 crystals and their analogous are solid solutions of In2Te3 and HgTe. Hg3In2Te6 crystals are congruently melted as chemical compound. Like In2Te3 the Hg3In2Te6 crystal has cubic crystal lattice with stoichiometric vacancies in their crystal structure. The electroconductivity, photoconductivity, mechanical, chemical properties of the crystals do not deteriorate after their irradiation by γ-photons with energies up to 1 MeV and doses up to 1018 cm-2 , by electrons with energies up to 300 MeV and doses up to 1019 cm-2 and by mixed reactor irradiation (filtered slow neutrons) with doses up to 1019 cm-2 [1,2]. This feature is determined by high concentration (~1021 cm-3) of stoihiometric vacancies (Vs) in crystal structure, where every third In-cation node is empty. These Vs are electroneutral, they capture all impurity atoms in these crystals and kept them in electroneutral state too. On the other hand this feature doesn't allow to form direct p-n junctions in these crystals by introducing the impurities. However, we have developed p-n junction analogues in form of Schottki diodes and corresponding photodiodes with semitransparent metal layer on single crystal Hg3In2Te6 substrate that allows irradiation to get into active region preserving this way all the advantages compared to p-n junction.

Sol–gel-derived thin-film stacks with high radiation stability

2014 ◽  
Vol 562 ◽  
pp. 435-439 ◽  
Author(s):  
Michael R. Dahlby ◽  
Moussa Barhoum ◽  
Michael H. Bartl
Keyword(s):  
Thin Film ◽  
Sol Gel ◽  
Radiation Stability ◽  
High Radiation

High radiation resistant crystals for x-ray and γ-radiation detectors

2021 ◽  
Author(s):  
Valery M. Skliarchuk ◽  
Petro M. Fochuk ◽  
Aleksey E. Bolotnikov ◽  
Ralph B. James
Keyword(s):  
Radiation Detectors ◽  
High Radiation ◽  
Γ Radiation ◽  
X Ray ◽  
Radiation Resistant

γ-Radiation effect on ionic liquid [bmim][BF4]

2008 ◽  
Vol 77 (7) ◽  
pp. 877-883 ◽  
Author(s):  
Mingying Qi ◽  
Guozhong Wu ◽  
Qianmei Li ◽  
Yingshe Luo
Keyword(s):  
Ionic Liquid ◽  
Radiation Effect ◽  
Γ Radiation
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