On the Reactions of the Aluminium Ion with Water.

Brosset, Cyrill; Wetlesen, C.U.; Linholt, S. C.; Finsnes, Ernst; Sörensen, Jörgine Stene; Sørensen, Nils Andreas

doi:10.3891/acta.chem.scand.06-0910

Cited by 85 publications

(38 citation statements)

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“…Under the condition of pH in the optimal range, Al-monomer or other Al-oligomer species tend to be hrther hydrolyzed and transform to AII3 and the content of All, increases rapidly with the increasing of R value. It agrees with the reports of previous researchers (Hsu, 1988;Akitt and Alan, 1981;Bottero et al, 1987Bottero et al, , 1988Brosset, 1952;Rowsell and Nazar, 2000;Allouche et d., 2000). In case of the pH over the maximum of the optimal range, the content of All, decreases due to the condensation or aggregation of Al13.…”

Section: Influence Of Ph On Alljsupporting

confidence: 82%

“…It is accepted prevalently that the Al(II1) ions in partially neutralized solution exhibit strong hydrolysis reactions and various polynuclear or polymer species in metastable state can be formed (Tang, 1998;Wang and Tang, 2001; Wang e t d . , 2002; Bersillon et d., 1980;Parker and Rertsch, 1992;Hsu, 1988; Alan, 198 1 ; Bottero P I d., 1987, 1988Brosset, 1952; Rowsell and Nazar, 2000; Allouche et d . , 2000;…”

Section: Introductionmentioning

confidence: 99%

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Al(III) speciation distribution and transformation in high concentration PACl solutions

Huang

Tang

Wang

et al. 2006

Journal of Environmental Sciences

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Section: Influence Of Ph On Alljsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Al(III) speciation distribution and transformation in high concentration PACl solutions

Huang

Tang

Wang

et al. 2006

Journal of Environmental Sciences

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“…Potentiometric techniques are featured prominently in experiments designed to measure precisely the hydrolysis equilibria in aluminum salt solutions (1)(2)(3)(4). These and other studies suggest that at very low total aluminum concentrations (about 10 -5 M) the mono-nuclear complexes AI(OH) ~+ and AI(OH)2 +, are present in significant amounts.…”

Section: Introductionmentioning

confidence: 99%

“…The first step in such a study is the preparation and characterization of the solid, an aspect of research in colloid chemical studies that is often neglected. This paper reports on a new experimental technique for the systematic 1 To whom requests for reprints should be addressed. study of the hydrolysis-precipitation process.…”

Section: Introductionmentioning

confidence: 99%

Hydrolysis-precipitation studies of aluminum (III) solutions. I. Titration of acidified aluminum nitrate solutions

Vermeulen

Geus

Stol

et al. 1975

Journal of Colloid and Interface Science

110

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Acidified aluminum nitrate solutions were fitrated with alkali (NaOH or KOH) over a temperature range of 24°C to 90°C. A homogeneous distribution of added base was achieved by: (i) in situ decomposition of urea (90°C); and (ii) a novel method involving injection through a capillary submerged in the agitated salt solution.The experimental pH curves are characterized by two plateaus (or platforms) separated by a steep jump in pH. These characteristic features were not previously observed in continuous titration experiments. This is especially true of the second platform, which begins at an OH/A1 ratio larger than 2.5. Stable colloidal solutions or gels are formed on traversing this plateau. The hydrolysis-precipitation behavior was also followed by light scattering and x-ray diffraction measurements.A qualitative picture of the neutralization process is developed.

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“…(ii) Model B and C: The existence of monomeric species in acid A1 solutions has been questioned by many authors (Brosset, 1952;Brosset, Biedermann and Sil16n, 1954;Aveston, 1965;Stol, van Helden and de Bruyn, 1976). Brosset et al (1954) proposed that the main product of hydrolysis is [AIdOH)~,~] 3+ (Model B), whilst Aveston (1965) Our results were also analyzed on the basis of these species as unique hydrolysis products (Table 5), showing that the discrepancies between CEC and AI values are more realistically explained by these models than by assuming the existence of unpolymerized species in Model A.…”

Section: Ionic Composition Of Ai Sorbed In 'Surface' Layersmentioning

confidence: 99%

The Release of Aluminum from Aluminosilicate Minerals. I. Kinetics

Cabrera

Talibudeen

1978

Clays and clay miner.

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Abstract--The rates of release of AI by M NH~NO3 (pH 3) from minerals saturated with AI ions at pH 3 suggest that AI ions migrated from the surface layers and the matrix cores of kaolinite, montmorillonite, illite, and biotite, but only from the matrix core of muscovite mica. From the 0.25-0.5 p.m kaolinite and montmorillonite, part of the 'surface' A1 is released 'instantaneously' and the rest by first order kinetics, but the coarse 1.5-2.5 ttm kaolinite has only the former component. From illite and biotite, 'surface' A1 is released by 'bulk diffusion' kinetics suggesting the existence of disturbed peripheral layers of finite thickness. The diffusion coefficients, D,., for the matrix core follow the trend: mica = biotite > illite > montmorillonite > kaolinite.Based on models proposed in previous work, the ionic composition of the "surface' AI is calculated. This shows that (1) this composition varies according to the mineral from 3 to 100% AI 3 § the remainder being in the hydrolyzed form, and (2) the apparent hydrolysis constants are different for each mineral and significantly different from those of AI ions in solution.

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On the Reactions of the Aluminium Ion with Water.

Cited by 85 publications

References 0 publications

Al(III) speciation distribution and transformation in high concentration PACl solutions

Al(III) speciation distribution and transformation in high concentration PACl solutions

Hydrolysis-precipitation studies of aluminum (III) solutions. I. Titration of acidified aluminum nitrate solutions

The Release of Aluminum from Aluminosilicate Minerals. I. Kinetics

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