Nitric acid adduct formation during crystallization of barium and strontium nitrates and their co-precipitation from nitric acid media

Mishina, N. E.; Zilberman, B. Ya.; Лумпов, А. А.; Kol’tsova, T. I.; Пузиков, Е. А.; Ryabkov, D. V.

doi:10.1007/s10967-014-3691-z

Cited by 6 publications

(2 citation statements)

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“…The second set of experiments intended to confirm the presence of HNO 3 adducts in Sr(NO 3 ) 2 precipitate as described in [12]. Aqueous solutions of Sr(NO 3 ) 2 were prepared and different amounts of nitric acid were added to vary nitric acid concentrations.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…To this aim, we first performed additional experiments in order to study, under our chemical conditions, two experimental facts previously observed by other authors: Ca carrying [3,9] and change of the Sr precipitate speciation [12], by introduction of HNO 3 in the solid, as a function of nitric acid concentration. Then, disregarding the Ca carrying effect, we examined the contribution that speciation softwares of different kinds could bring to the understanding of our samples.…”

Section: Introductionmentioning

confidence: 99%

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Description of strontium precipitation in highly concentrated nitric acid

Baudat

Billard

Gautier

2022

J Radioanal Nucl Chem

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The precipitation of strontium in highly concentrated nitric acid is often used in standard radiochemical methods for 90 Sr separation. In this work, the description of Sr behavior in such conditions was studied in the point of speciation simulation. Standard speciation method based on Phreeqc software was considered but two problems underlined the limits of this approach to study this process: inappropriate ionic strength correction model (for I>10 M) and the particular dissociation of nitric acid. To overcome these issues, a multipurpose-fitting routine, Minuit, was used to fit chemical model parameters. A polynomial expression was also added to the model in order to take into account nitric acid dissociation. This alternative was proved successful to calculate the Sr precipitate in highly concentrated nitric acid. Comparison was made with the results obtained with Design of Experiment methodology.

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Section: Experimental Methodsmentioning

confidence: 99%