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Equilibrium studies of ternary aluminium(III) hydroxo complexes with ligands related to conditions in natural waters
Umeå University, Faculty of Science and Technology, Department of Chemistry.
1983 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The thesis is a summary and discussion of eight papers. During the last decades, precipitation has become increasingly acidic due to the extensive use of fossil fuels. In areas of poorly buffered bedrocks, e.g. Scandinavia, northeastern United States, this phenomenon has resulted in elevated amounts of Al(III) being leached into streams and lakes. Recent findings reveal that these elevated Al-concentrations could cause fish death and decreasing forest production.

In the present thesis, the importance of taking naturally occurring substances into consideration when discussing Al(III) in natural waters, is emphasized. On the basis of a chemical characterization of relevant ligand classes in a natural water, the complex formation between Al^+, hydroxide ions and the inorganic ligand carbonic acid, the low-molecular weight organic ligand citric acid and the high-molecular weight model substances gallic acid, 1,2-dihydroxynaphtha-lene-4-sulfonate, 1,2-naphthoquinone-4-sulfonate, pyrocatechol and salicylic acid were investigated. The investigations were performed as series of Potentiometrie titrations and data were processed by means of the least-squares computer program LETAGROPVRID using a technique called pqr-analysis, permitting an unbiased search for complex model (and corresponding equilibrium constants) to be made. In most systems studied, the complexation at high ligand excesses can be described by a series of mononuclear complexes AIL-AIL^. Tentatively, the whole series consists of octahedrally coordinated (water and ligand oxygens) AI(III). At lower ligand excesses, the significance and in some cases even predominance of ternary mono- and polynuclear hydroxo complexes is demonstrated. In two of the systems, binary aluminium hydroxo species are evaluated.

The potential importance of the substances with respect to Al-com-plexation in natural waters are indicated in a number of model calculations. The solubility of the clay mineral kaolinite is calculated as a function of -lg[H+] and ligand concentration. It is shown that citric acid, gallic acid, 1,2-dihydroxynaphthalene-4-sulfonate, pyrocatechol and salicylic acid contribute quite significant to the total solubilities, even at very low concentrations.

As a complement and background to the equilibrium studies, the corrosion rate for one of the naturally occurring Al-bearing minerals, corundum, is reported. In this investigation, performed with a leach-ant solution of ground-water composition, an experimental technique was employed which made it possible to divide the corrosion into chemical and mechanical losses.

Place, publisher, year, edition, pages
Umeå: Umeå universitet , 1983. , 45 p.
Keyword [en]
aqueous solution, binary and ternary hydroxo complexes of Al3+, carbonic acid, citric acid, phenolic ligands, emf-titrations, equilibrium analysis, model calculations towards natural waters
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-94116ISBN: 91-7174-124-0 (print)OAI: oai:DiVA.org:umu-94116DiVA: diva2:753613
Public defence
1983-05-20, Kemiska institutionen, sal B, Lu0, Umeå universitet, Umeå, 10:00
Projects
digitalisering@umu
Note

Diss. (sammanfattning) Umeå : Umeå universitet, 1983

Available from: 2014-10-09 Created: 2014-10-03 Last updated: 2015-04-10Bibliographically approved
List of papers
1. Equilibrium and Structural Studies of Silicon(IV) and Aluminium(III) in Aqueous Solution: 1. The Formation of Ternary Mononuclear and Polynuclear Complexes in the System Al(3+)--Gallic Acid--OH-. A Potentiometric Study in 0.6 M Na(Cl)
Open this publication in new window or tab >>Equilibrium and Structural Studies of Silicon(IV) and Aluminium(III) in Aqueous Solution: 1. The Formation of Ternary Mononuclear and Polynuclear Complexes in the System Al(3+)--Gallic Acid--OH-. A Potentiometric Study in 0.6 M Na(Cl)
1981 (English)In: Acta Chemica Scandinavica, ISSN 0302-4377, Vol. A 35, 201-212 p.Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Acta Chemica Scandinavica, 1981
National Category
Chemical Sciences
Identifiers
urn:nbn:se:umu:diva-94440 (URN)10.3891/acta.chem.scand.35a-0201 (DOI)
Available from: 2014-10-09 Created: 2014-10-09 Last updated: 2014-10-09Bibliographically approved
2. Equilibrium and Structural Studies of Silicon(IV) and Aluminium(III) in Aqueous Solution: 3. Potentiometric Study of Aluminium(III) Hydrolysis and Aluminium(III) Hydroxo Carbonates in 0.6 M Na(Cl)
Open this publication in new window or tab >>Equilibrium and Structural Studies of Silicon(IV) and Aluminium(III) in Aqueous Solution: 3. Potentiometric Study of Aluminium(III) Hydrolysis and Aluminium(III) Hydroxo Carbonates in 0.6 M Na(Cl)
1981 (English)In: Acta Chemica Scandinavica, ISSN 0302-4377, Vol. A 35, 795-802 p.Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Acta Chemica Scandinavica, 1981
National Category
Chemical Sciences
Identifiers
urn:nbn:se:umu:diva-94438 (URN)10.3891/acta.chem.scand.35a-0795 (DOI)
Available from: 2014-10-09 Created: 2014-10-09 Last updated: 2014-10-09Bibliographically approved
3. Equilibrium and Structural Studies of Silicon(IV) and Aluminium(III) in Aqueous Solution: 4. A Potentiometric Study of Polynuclear Aluminium(III) Hydroxo Complexes with Gallic Acid in Hydrolyzed Aluminium(III) Solutions.
Open this publication in new window or tab >>Equilibrium and Structural Studies of Silicon(IV) and Aluminium(III) in Aqueous Solution: 4. A Potentiometric Study of Polynuclear Aluminium(III) Hydroxo Complexes with Gallic Acid in Hydrolyzed Aluminium(III) Solutions.
1982 (English)In: Acta Chemica Scandinavica, ISSN 0302-4377, Vol. A 36, 47-53 p.Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Acta Chemica Scandinavica, 1982
National Category
Chemical Sciences
Identifiers
urn:nbn:se:umu:diva-94437 (URN)10.3891/acta.chem.scand.36a-0047 (DOI)
Available from: 2014-10-09 Created: 2014-10-09 Last updated: 2014-10-09Bibliographically approved
4. Equilibrium and Structural Studies of Silicon(IV) and Aluminium(III) in Aqueous Solution: 7. Redox, Hydrolysis and Complexation Equilibria in the System Al(3+)-1,2-Naphthoquinone-4-sulfonate/1,2-Dihydroxy-naphthalene-4-sulfonate-OH(-). A Potentiometric Study in 0.6 M Na(Cl)
Open this publication in new window or tab >>Equilibrium and Structural Studies of Silicon(IV) and Aluminium(III) in Aqueous Solution: 7. Redox, Hydrolysis and Complexation Equilibria in the System Al(3+)-1,2-Naphthoquinone-4-sulfonate/1,2-Dihydroxy-naphthalene-4-sulfonate-OH(-). A Potentiometric Study in 0.6 M Na(Cl)
1983 (English)In: Acta Chemica Scandinavica, ISSN 0302-4377, Vol. A 37, 561-568 p.Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Acta Chemica Scandinavica, 1983
National Category
Chemical Sciences
Identifiers
urn:nbn:se:umu:diva-94431 (URN)10.3891/acta.chem.scand.37a-0561 (DOI)
Available from: 2014-10-09 Created: 2014-10-09 Last updated: 2014-10-09Bibliographically approved
5. Equilibrium and Structural Studies of Silicon(IV) and Aluminium(III) in Aqueous Solution: 8. A potentiometric study of aluminium(III) Salicylates and Aluminium(III) Hydroxo Salicylates in 0.6 M Na(C1)
Open this publication in new window or tab >>Equilibrium and Structural Studies of Silicon(IV) and Aluminium(III) in Aqueous Solution: 8. A potentiometric study of aluminium(III) Salicylates and Aluminium(III) Hydroxo Salicylates in 0.6 M Na(C1)
1983 (English)In: Acta Chemica Scandinavica. Series A., ISSN 0302-4377, Vol. 37, 875-880 p.Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Acta Chemica Scandinavica, 1983
National Category
Chemical Sciences
Identifiers
urn:nbn:se:umu:diva-94410 (URN)
Available from: 2014-10-08 Created: 2014-10-08 Last updated: 2014-10-09Bibliographically approved
6. Equilibrium and Structural Studies of Silicon(IV) and Aluminium(III) in Aqueous Solution: Part 9. A Potentiometric Study of Mono- and Polynuclear Aluminium(III)-Citrates
Open this publication in new window or tab >>Equilibrium and Structural Studies of Silicon(IV) and Aluminium(III) in Aqueous Solution: Part 9. A Potentiometric Study of Mono- and Polynuclear Aluminium(III)-Citrates
1983 (English)In: Journal of the Chemical Society. Dalton Transactions, ISSN 1472-7773, E-ISSN 1364-5447, no 11, 2513-2517 p.Article in journal (Refereed) Published
National Category
Chemical Sciences
Identifiers
urn:nbn:se:umu:diva-94441 (URN)10.1039/dt9830002513 (DOI)A1983RR21500026 ()
Available from: 2014-10-09 Created: 2014-10-09 Last updated: 2017-12-05Bibliographically approved
7. Equilibrium and structural studies of silicon(IV) and aluminium(III) in aqueous solution—10: A potentiometric study of aluminium(III) pyrocatecholates and aluminium(III) hydroxo pyrocatecholates in 0.6 M Na(Cl)
Open this publication in new window or tab >>Equilibrium and structural studies of silicon(IV) and aluminium(III) in aqueous solution—10: A potentiometric study of aluminium(III) pyrocatecholates and aluminium(III) hydroxo pyrocatecholates in 0.6 M Na(Cl)
1983 (English)In: Polyhedron, ISSN 0277-5387, E-ISSN 1873-3719, Vol. 2, no 12, 1329-1335 p.Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Elsevier, 1983
National Category
Chemical Sciences
Identifiers
urn:nbn:se:umu:diva-94408 (URN)10.1016/S0277-5387(00)84395-8 (DOI)
Available from: 2014-10-08 Created: 2014-10-08 Last updated: 2017-12-05Bibliographically approved
8. Corrosion of Dense Polycrystalline -Al2O3 in NaHCO3-Buffered Water Solution of pH 8.5 at 40-100 °C
Open this publication in new window or tab >>Corrosion of Dense Polycrystalline -Al2O3 in NaHCO3-Buffered Water Solution of pH 8.5 at 40-100 °C
1982 (English)In: American Ceramic Society Bulletin, ISSN 0002-7812, E-ISSN 1945-2705, Vol. 61, no 5, 567-571 p.Article in journal (Refereed) Published
Place, publisher, year, edition, pages
American Ceramic Society, 1982
National Category
Chemical Sciences
Identifiers
urn:nbn:se:umu:diva-94409 (URN)
Available from: 2014-10-08 Created: 2014-10-08 Last updated: 2017-12-05Bibliographically approved

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