Anion-exchange Studies. XI. Lead(II) and Bismuth(III) in Chloride and Nitrate Solutions<sup>1,2</sup>

Nelson, Frederick; Kraus, Kurt A.

doi:10.1021/ja01652a006

Cited by 95 publications

(30 citation statements)

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“…[36,[38][39][40][41][42][43][44][45][46][47] According to Figure 7, La was not absorbed in the range from 0 to 12 mol L À1 HCl. However, Bi absorption reached extremely high values of about 1 mol L À1 HCl.…”

Section: Elimination Of Bi By Anion Exchange Separationmentioning

confidence: 99%

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Preparation and Evaluation of High-Purity La2O3

Lee

Uchikoshi

Mimura

et al. 2010

Metall Mater Trans B

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A separation procedure based on extraction chromatography using the di(2-ethylhexyl) phosphoric acid (D2EHPA) impregnated resin, anion exchange with DIAION SA 10 resin, and oxalate precipitation has been developed for the preparation of high-purity La 2 O 3 in hydrochloric acid media at a high La concentration. The metallic impurities Ce, Pr, Nd, Sm, K, Mg, Ca, Zn, Cu, Co, Mn, Pb, Al, In, and Fe, but not Bi, were removed efficiently from La by extraction chromatography using a D2EHPA impregnated resin. The Bi was separated from the La by anion exchange (DIAION SA 10) separation. Thus, a high-purity LaCl 3 solution was obtained by anion exchange separation and extraction chromatography. La 2 O 3 was prepared from the purified LaCl 3 solution by oxalate precipitation. Glow discharge mass spectrometry was applied for purity evaluation of the prepared La 2 O 3 . The purity of the prepared La 2 O 3 was more than 99.9998 pct total rare earth oxide.

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Section: Elimination Of Bi By Anion Exchange Separationmentioning

confidence: 99%

“…The purity of the prepared La 2 O 3 was evaluated by GDMS. Table II displays [38][39][40][41][42][43][44][45] predominantly based on the column elution method; solid lines and underlined notes present results derived from batch equilibration experiments [36,46,47] ).…”

Section: Evaluation Of Prepared La 2 O 3 By Gdmsmentioning

confidence: 99%

Preparation and Evaluation of High-Purity La2O3

Lee

Uchikoshi

Mimura

et al. 2010

Metall Mater Trans B

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“…Pb is not noticeably sorbed, and the maximum sorption of Bi (K d ≈ 30) is observed in 1-2 M HNO 3 [12].…”

Section: Anion Exchangermentioning

confidence: 91%

A study of the ion-exchange behavior of Pb and Bi as homologs of elements 114 and 115, respectively, in aqueous and aqueous-methanol solutions of HNO3

Guseva

2012

Radiochemistry

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The ion-exchange behavior of Pb and Bi as homologs of elements 114 and 115, respectively, in aqueous and aqueous-methanol solutions of HNO 3 was studied. The distribution coefficients of Bi, Pb, Ra, and some actinides between the ion exchangers and HNO 3 solutions were determined in relation to the acid and methanol concentrations in the solution and to the kind of the ion exchanger. The distribution coefficients of Bi and other elements under consideration in sorption on the cation and anion exchangers from mixed aqueousmethanol HNO 3 solutions differ considerably. The optimum conditions were found for the isolation of carrierfree short-lived Pb and Bi isotopes and for their separation from actinides and other elements using the ion exchangers and aqueous-methanol HNO 3 solutions. The possibility of repeated isolation of short-lived Bi isotopes with their simultaneous separation from the long-lived parent radionuclides (Ac, Ra, Pb) on the cation exchanger (radioisotope generators) using mixed HNO 3 /CH 3 OH solution and of on-line preconcentration of these isotopes on the anion exchanger was demonstrated.The synthesis of superheavy elements (SHEs) with Z = 113-118, accomplished at the Flerov Laboratory of Nuclear Reactions (Dubna, Russia), is an experimental proof of the existence of the "islands of stability," hypothesized as early as the middle of the XX century. This success opens wide prospects for studying the chemistry of these elements [1].A study of the chemical properties of SHEs, determining their position in the periodic table, is one of priority problems of the modern radiochemistry. Data obtained in this field will expand our knowledge of the structure of atom electronic shells and will allow us to reveal relativistic effects associated with the electronic structure of heavy element atoms. Because of short lifetime of SHEs and low cross sections of their production in nuclear reactions, study of the chemistry of these elements is difficult and labor-consuming. For isolation of SHEs from irradiated targets, their chemical identification, and study of their behavior in various systems, specific methods and approaches are being developed using as examples their light homologs, as a rule, in the carrier-free state [2,3]. The most promising for studying the SHE chemistry in solutions are chromatographic methods allowing the speciation, complexation, oxidation state, and other chemical properties to be studied on high reliability level with ultrasmall amounts of elements.Previously we studied the ion-exchange behavior of Pb and Bi as homologs of elements 114 and 115, respectively, in solutions of hydrohalic acids and showed that, in dilute HCl and HBr solutions, these elements form strong neutral and anionic complexes sorbed by the anion exchanger [3][4][5][6][7]. This study deals with the ion-exchange behavior of carrier-free short-lived isotopes of Pb and Bi in aqueous and aqueous-methanol solutions of nitric acid and is aimed to examine the chemical forms and complexation of these isotopes in dilute HN...

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“…2 The sorption of elements from hydrochloric acid solutions on strong base anion-exchange resins. 8,[28][29][30][31][32][33][34][35][36][37] The separation procedure was devised based on Fig. 2.…”

Section: Experimental Methodsmentioning

confidence: 99%

Modeling of Elution Curves in Preparative Chromatography Using Anion-Exchange Resin for Cobalt Purification

2009

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There have been many studies on the modeling of elution and breakthrough curves of ion-exchange chromatography. A precise representation of elution curves using an appropriate mathematical model is significant for the application and expansion of ion-exchange chromatography. The significance of precise modeling particularly increases when the yield and purity of the product are important. However, no previous studies have proposed a model that can perfectly represent experimental elution curves. We investigated the purification of various metals by anion-exchange separation and determined an optimum condition for purification of an element through trial and error. An appropriate model replicating the elution curves accurately is greatly needed to reduce the testing phase. Consequently, this paper proposes a novel model called the plate theory in multi-path mode, in which three virtual paths are assumed. The results show that this model well represents the experimental elution curves. In addition, the model was validated by comparing the distribution coefficients obtained from the fitting results with those determined by previously reported batch experiments.

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Anion-exchange Studies. XI. Lead(II) and Bismuth(III) in Chloride and Nitrate Solutions^1,2

Cited by 95 publications

References 1 publication

Preparation and Evaluation of High-Purity La2O3

Preparation and Evaluation of High-Purity La2O3

A study of the ion-exchange behavior of Pb and Bi as homologs of elements 114 and 115, respectively, in aqueous and aqueous-methanol solutions of HNO3

Modeling of Elution Curves in Preparative Chromatography Using Anion-Exchange Resin for Cobalt Purification

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Anion-exchange Studies. XI. Lead(II) and Bismuth(III) in Chloride and Nitrate Solutions1,2

Cited by 95 publications

References 1 publication

Preparation and Evaluation of High-Purity La2O3

Preparation and Evaluation of High-Purity La2O3

A study of the ion-exchange behavior of Pb and Bi as homologs of elements 114 and 115, respectively, in aqueous and aqueous-methanol solutions of HNO3

Modeling of Elution Curves in Preparative Chromatography Using Anion-Exchange Resin for Cobalt Purification

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Anion-exchange Studies. XI. Lead(II) and Bismuth(III) in Chloride and Nitrate Solutions^1,2