Separation of Strontium Ion From a Large Amount of Calcium Ion by the Use of a Macrocyclic Ether

Kimura, Takeyoshi; Iwashima, Kiyoshi; Ishimori, Tatsujirô; Hamaguchi, Hiroshi

doi:10.1246/cl.1977.563

Cited by 31 publications

(10 citation statements)

References 3 publications

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“…Major part of the earlier work in this direction involved extraction from alkaline or weakly acidic solutions employing large organophilic counter anions such as picrate [5,6], Blasius et al [7], have employed DCH18C6 in 1,1,2,2-tetrachloroethane for extraction of Sr from 2 M HNO3 without using any counter anion. It has been reported that the presence of tributyl phosphate (TBP) and didodecyl naphthalene sulphonic acid (DDNS) enhanced the extraction ability of the substituted crown Compounds in toluene and reasonable Sr extraction was achieved by Gerow et al [8], at 3 M HNO3.…”

Section: Introductionmentioning

confidence: 99%

Extraction of Radiostrontium from Nitric Acid MediumUsing Di-t-Butyl Cyclohexano 18Crown6in an Aliphatic Alcohol Mixture Diluent

1999

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Radiostrontium / Crown ether / Extraction / Aliphatic alcohol SummaryExtraction behaviour of Sr(II) from nitric acid medium was studied employing di-t-butyl cyclohexano 18 crown 6 (DtBuCH18C6) in various aliphatic alcohols as the organic diluents. A mixture of 80% butanol and 20% octanol was found to give higher D,, values as compared to other alcohols investigated. A linear correlation between the organic phase water content and Ds, was observed. Extraction profiles obtained with varying ligand concentration suggested 1:1:2 M:L:NO,T stoichiometry for the extracted species where L is the crown ether. The two-phase extraction constant value obtained for the present system (K.,; = 132) was found to be much larger as compared to both DtBuCH18C6-octanol extraction system (k^, = 48) and DCH18C6 (dicyclohexano 18 crown 6)-80% butanol-20% octanol mixture system (k^» = 32). Distribution behaviour of Sr(II) was studied as a function of the inert electrolyte concentration (such as LiNO,, Mg(N03)2 and AKNOOs) and also as a function of mineral acid (such as HCl, HCIO4, HNO,) concentration. Selectivity studies on Sr(II) with respect to fission products (obtained from irradiated natural uranium target) such as Mo-99, Ce-143, La-140, Ru-103, Te-132, Zr-97, Cs-137, 1-133 and Ba-140 were carried out and compared with the corresponding data obtained with DCH18C6.

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Section: Introductionmentioning

confidence: 99%

Extraction of Radiostrontium from Nitric Acid MediumUsing Di-t-Butyl Cyclohexano 18Crown6in an Aliphatic Alcohol Mixture Diluent

1999

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“…On the other hand, it is well known that Sr 2+ reacts with 18-crown-6 derivatives to form cationic 1:1 complexes in ionpair extraction to organic solvents [2][3][4][5][6] and ion-exchange extraction to ILs. [7][8][9] Namely, in the Sr extraction with DC18C6 alone, it was expected that the extraction equilibrium is expressed as follows:…”

Section: Extracted Species and Equilibrium In The Single-extractant Smentioning

confidence: 99%

“…1 Several 18-crown-6 derivatives, neutral macrocyclic ligands with suitable cavity size (260 -320 pm for 18-crown-6) for complexation to Sr 2+ (ionic radius = 132 pm), have been used for extraction of Sr to polar or aromatic organic solvents as ion-pair with picrate or other counteranion since the 1970s [2][3][4] up to the present. 1,5,6 Moreover, several researchers have investigated the possible use of hydrophobic ionic liquids (ILs) as extraction solvents for Sr with the 18-crown-6 derivatives.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Ion-pair Extraction of Strontium Ion with Tri-n-octylphosphine Oxide and Dicyclohexano-18-crown-6

2016

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“…Much research has focused on the development of a workable acid-side liquid-liquid extraction process for the removal of strontium. Kimura et al (1977), for example, utilized one of the macrocyclic polyethers (dicyclohexano-18-crown-6) to separate "Sr from milk. This crown ether was observed as ineffective in highly acid samples, a significant limitation.…”

Section: Novel Chromatographic Chemicalsmentioning

confidence: 99%

Radioanalytical technology for 10 CFR Part 61 and other selected radionuclides: Literature review

Thomas¹,

Thomas²,

Robertson³

1996

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NRC Job Code LlSOSDisclaimer is not a substitute for NRC regulations and compliance is not required.The approaches and/or methods described in this NUREGKR are provided for information only.Publication of this report does not necessarily constitute NRC approval or agreement with the information contained herein. AbstractA.comprehensive l i t e r a t u r e review and assessment was conducted t o identify and evaluate radioanalyti cal techno1 ogy and procedures used for measuring 10CFR61 radionuclides and 'other long-1 ived isotopes. This review evaluated radiochemical procedures currently i n use a t a number of laboratories i n the US, as well as identifying new advanced methods and techniques which-could be adapted for routine radiochemical analyses of low-level radioactive waste. The 10CFR61 radi onucl ides i ncl.ude I4C, 6oCo, 59*63Ni , "Sr, 94Nb, "Tc, '''I, 137Cs, and TRU Isotopes w i t h half-lives greater than five years. The other low-level which may be present i n various types of waste streams from nuclear power stations. radi onucl ides of interest i ncl ude 7-'0Be, 26A1 , 36Cl , 9 3 M~, lw.ll%d, and 121a-126 Sn , 0 ... -.

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Separation of Strontium Ion From a Large Amount of Calcium Ion by the Use of a Macrocyclic Ether

Cited by 31 publications

References 3 publications

Extraction of Radiostrontium from Nitric Acid MediumUsing Di-t-Butyl Cyclohexano 18Crown6in an Aliphatic Alcohol Mixture Diluent

Extraction of Radiostrontium from Nitric Acid MediumUsing Di-t-Butyl Cyclohexano 18Crown6in an Aliphatic Alcohol Mixture Diluent

Synergistic Ion-pair Extraction of Strontium Ion with Tri-n-octylphosphine Oxide and Dicyclohexano-18-crown-6

Radioanalytical technology for 10 CFR Part 61 and other selected radionuclides: Literature review

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