Studies on the Hydrolytic Behavior of Zirconium(IV)

Ekberg, Christian; Källvenius, Göran; Albinsson, Yngve; Brown, Paul L.

doi:10.1023/b:josl.0000026645.41309.d3

Cited by 105 publications

(88 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unfortunately, however, only a few data that are free from the effect of colloidal species are available. As shown in Table 1, only the log 1;1 value is selected for mononuclear species, which was obtained by a solvent extraction method with a considerably low solute concentration, 8) and the values of log 1;6 and log 4;8 were estimated as upper limit values that are consistent with the observed solubility values.…”

Section: Reference and Parameter Valuesmentioning

confidence: 99%

Hydrolysis Constant and Coordination Geometry of Zirconium(IV)

Sasaki

Kobayashi

Takagi

et al. 2008

J. Nucl. Sci. Technol.

View full text Add to dashboard Cite

The solubility of zirconium was studied by comparing recent experimental data with predictions using an electrostatic hard sphere model. In the model, an antiprismatic structure was assumed for a mononuclear hydrolysis species of zirconium, and the formation of an oligomeric species such as Zr 4 (OH) 8 8þ was considered by combining antiprismatic structure units, which was supported by the theoretical approach. By taking the known values of the solubility products, the hydrolysis constants of these mononuclear and polynuclear species were evaluated and were found to be consistent with the experimental solubility data of amorphous Zr(OH) 4 and crystalline ZrO 2 .

show abstract

Section: Reference and Parameter Valuesmentioning

confidence: 99%

Hydrolysis Constant and Coordination Geometry of Zirconium(IV)

Sasaki

Kobayashi

Takagi

et al. 2008

J. Nucl. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…9) There may be some similarities and differences in these values in Table 1. As a cause of slightly high values of log i;q compared with Walther et al's data, the polymerization to larger species might proceed due to the longer aging period compared with Walther et al's samples aged for at least 1 h. For comparison of the values, however, it is noted that the present log i;q values are obtained by assuming such predominant species as (1,1), (2,4), (3,6), (4,10), (5,12), (8,22), (10,30), and (12,38) in the pH c range of 0.05 to 2.10 in the present study. Because of this assumption, the values are considered to be only temporal, for which further confirmation is needed.…”

Section: )mentioning

confidence: 53%

“…In the case of Zr, only mononuclear species were considered in some early studies of hydrolysis constants, 1,2) but the formation of polynuclear and colloidal species was observed in many studies. [3][4][5][6] For instance, measuring the size distributions of such species by ultrafiltration (at 3 kDa), Sasaki et al proposed that mononuclear, polynuclear, and colloidal species coexist in weakly acidic and neutral pH solutions. 7) On the other hand, Cho et al developed a method by combining laserinduced breakdown detection (LIBD) with slow coulometric titration in order to sensitively detect the formation of tiny zirconium colloids (>5 nm in size) without the ultrafiltration process.…”

Section: Introductionmentioning

confidence: 99%

Detection of Polynuclear Zirconium Hydroxide Species in Aqueous Solution by Desktop ESI-MS

Sasaki

Nakaoka

Arakawa

et al. 2010

J. Nucl. Sci. Technol.

View full text Add to dashboard Cite

The direct detection of polymerized tetravalent zirconium hydroxides was performed by using a commercially available desktop electrospray ionization mass spectrometry device equipped with a nanospray capillary heated at 90 C. It was confirmed that the abundance ratio of the species did not depend significantly on the desolvation line temperature up to 170 C. Under the acidic pH condition, the positively charged polymers up to 12-mer species of zirconium were assigned based on the m/z values and the natural abundance isotopic compositions of Zr and Cl. The distribution of the species was observed to change depending on the pH value and the aging period. The hydrolysis constants for the polynuclear species predominantly formed in a solution were estimated from the results of the analysis of the observed spectra with the help of an electrostatic hard sphere model. The obtained values were found to be comparable with the literature ones.

show abstract

“…On the other hand, dissolved Zr and Hf speciation is driven by the formation of hydroxyl complexes with different degrees of hydrolysis (Byrne, 2002 (Aja et al, 1995;Veyland et al, 1998;Byrne, 2002;Ekberg et al, 2004;Qiu et al, 2009). Because biological surfaces are negatively charged (Borrok et al, 2004), their larger affinity towards Hf rather than Zr can be ruled out and interactions between dissolved Zr and Hf species could occur through surface complexation.…”

Section: Discussionmentioning

confidence: 99%