Title

Temperature Dependence of Europium Carbonate Complexation

Document Type

Article

Publication Date

1987

Keywords

Europium, carbonate complexation, carbonic acid dissociation, tributy phosphate extraction

Digital Object Identifier (DOI)

https://doi.org/10.1007/BF00646333

Abstract

The temperature dependencies of europium carbonate stability constants were examined at 15, 25, and 35°C in 0.68 molal Na+(ClO 4 − , HCO 3 − ) using a tributyl phosphate solvent extration technique. Our distribution data can be explained by the equilibria $$\begin{gathered} Eu^{3 + } + H_2 O + CO_2 (g)_ \leftarrow ^ \to EuCO_3^ + + 2H^ + \hfill \\ - log\beta _{12} = 9.607 + 496(t + 273.16)^{ - 1} \hfill \\ Eu^{3 + } + 2H_2 O + 2CO_2 (g)_ \leftarrow ^ \to Eu(CO_3 )_2^ - + 4H^ + \hfill \\ - log\beta _{24} = 21.951 + 670(t + 273.16)^{ - 1} \hfill \\ Eu^{3 + } + H_2 O + CO_2 (g)_ \leftarrow ^ \to EuHCO_3^{2 + } + H^ + \hfill \\ - log\beta _{11} = 1.688 + 1397(t + 273.16)^{ - 1} \hfill \\ \end{gathered}$$

Was this content written or created while at USF?

Yes

Citation / Publisher Attribution

Journal of Solution Chemistry, v. 16, p. 555-566

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