Application of the Specific Ion Interaction Theory → the Solubility Product and First Hydrolysis Constant of Europium

Jiménez‐Reyes, M.; Solache‐Ríos, M.; Rojas-Hernándéz, Alberto

doi:10.1007/s10953-006-9363-z

Cited by 14 publications

(3 citation statements)

References 15 publications

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“…The literature data, however, are insufficient (especially for the gluconate complexes) to perform accurate calculations with these models. Nonetheless, the SIT approach was found to be applicable at I > 4 M in numerous cases, a also for different background electrolytes, − including NaCl. , Hence, we used this model following the approach of the standard NEA-TDB review…”

Section: Computationsmentioning

confidence: 99%

Magnesium(II) d-Gluconate Complexes Relevant to Radioactive Waste Disposals: Metal-Ion-Induced Ligand Deprotonation or Ligand-Promoted Metal-Ion Hydrolysis?

et al. 2019

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The complexation equilibria between Mg2+ and d-gluconate (Gluc–) ions are of particular importance in modeling the chemical speciation in low- and intermediate-level radioactive waste repositories. NMR measurements and potentiometric titrations conducted at 25 °C and 4 M ionic strength revealed the formation of the MgGluc+, MgGlucOH0, MgGluc(OH)2–, and Mg3Gluc2(OH)40 complexes. The trinuclear species provides indirect evidence for the existence of multinuclear magnesium(II) hydroxido complexes, whose formation was proposed earlier but has not been confirmed yet. Additionally, speciation calculations demonstrated that MgCl2 can markedly decrease the solubility of thorium(IV) at low ligand concentrations. Regarding the structure of MgGluc+, both IR spectra and density functional theory (DFT) calculations indicate the monodentate coordination of Gluc–. By the potentiometric data, the acidity of the water molecules is higher in the MgGluc+ and MgGlucOH0 species than in the Mg(H2O)62+ aqua ion. On the basis of DFT calculations, this ligand-promoted hydrolysis is caused by strong hydrogen bonds forming between Gluc– and Mg(H2O)62+. Conversely, metal-ion-induced ligand deprotonation takes place in the case of calcium(II) complexes, giving rise to salient variations on the NMR spectra in a strongly alkaline medium.

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Section: Computationsmentioning

confidence: 99%

Magnesium(II) d-Gluconate Complexes Relevant to Radioactive Waste Disposals: Metal-Ion-Induced Ligand Deprotonation or Ligand-Promoted Metal-Ion Hydrolysis?

et al. 2019

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“…The solubility of Eu(OH) 3 (s) has been investigated in several literatures [4,15,16,18,24,25,[39][40][41][42]. Akselrud and Ermolenko [18] observed starting points of precipitation by adding NaOH solutions to Eu solution in certain concentrations.…”

Section: Eu Solubilities Measured At 25 °C After Aging At 25 Tomentioning

confidence: 99%

“…The solubility products at T meas = 25 °C were determined to be log K s° = 18.4±0.2 for Eu 2 O 3 (cr), and log K s° = 17.2±0.3 for Eu(OH) 3 (cr). In literatures, a number of log K s° for Eu(OH) 3 (cr) has been reported [15,16,18,25,[39][40][41][42], while no log K s° value for Eu 2 O 3 (cr). The obtained log K s° for Eu(OH) 3 (cr) in the present study was slightly higher than the reported values and the selected one of log K s° = 16.48±0.30 in [4].…”

Section: Solubility Product Of Ln 2 O 3 (Cr) and Ln(oh) 3 (Cr) At T Mmentioning

confidence: 99%

Solubility and solid phase of trivalent lanthanide hydroxides and oxides

Moniruzzaman

Kobayashi

Sasaki

2020

J. Nucl. Radiochem. Sci.

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An undersaturation approach was adopted to reveal the solubility and solubility-limiting solid phase of La, Eu and Tm in the sample solutions with the ionic strength (I) of 0.1 mol/L (M) and the hydrogen ion concentration range (pH c =-log [H + ]) of 6 to 12 after aging at 25 to 90°C for certain periods up to 12 weeks. Solubility and solubilitylimiting solid phases were discussed with the aid of X-ray diffraction (XRD) patterns of the solid phases and temperature dependence of solubility products (log K s°) values. The XRD patterns of the solid phases indicated that the initial solid phase of La 2 O 3 (cr) transformed to La(OH) 3 (cr) after aging at 25 °C and 90 °C. On the other hand, Eu 2 O 3 (cr) remained stable after aging at 25 °C, but after 90 °C, converted to Eu(OH) 3 (cr). It was observed that Tm 2 O 3 (cr) was not transformed after aging at both 25 °C or 90 °C. Thermodynamic properties obtained from the temperature dependence of the solubility products agreed well with the observations in the XRD patterns.

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Scandium, Yttrium and the Lanthanide Metals

2016

Hydrolysis of Metal Ions

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Application of the Specific Ion Interaction Theory → the Solubility Product and First Hydrolysis Constant of Europium

Cited by 14 publications

References 15 publications

Magnesium(II) d-Gluconate Complexes Relevant to Radioactive Waste Disposals: Metal-Ion-Induced Ligand Deprotonation or Ligand-Promoted Metal-Ion Hydrolysis?

Magnesium(II) d-Gluconate Complexes Relevant to Radioactive Waste Disposals: Metal-Ion-Induced Ligand Deprotonation or Ligand-Promoted Metal-Ion Hydrolysis?

Solubility and solid phase of trivalent lanthanide hydroxides and oxides

Scandium, Yttrium and the Lanthanide Metals

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