27Al NMR Study of the Hydrolysis and Condensation of Organically Complexed Aluminum
Aluminum is the most abundant metal of the Earth’s crust, of which it represents approximately 8%, ranking after oxygen and silicon. It exists mainly as oxides. In terrestrial environments, aluminum commonly exists as secondary (authigenic) hydroxide or aluminosilicate minerals, mainly clays. These...
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croxfordunivpr:10.1093/oso/9780195097511.003.0015 2023-05-15T15:53:00+02:00 27Al NMR Study of the Hydrolysis and Condensation of Organically Complexed Aluminum Thomas, Fabien Masion, Armand 1997 http://dx.doi.org/10.1093/oso/9780195097511.003.0015 unknown Oxford University Press Nuclear Magnetic Resonance Spectroscopy in Environment Chemistry book-chapter 1997 croxfordunivpr https://doi.org/10.1093/oso/9780195097511.003.0015 2022-08-05T10:29:09Z Aluminum is the most abundant metal of the Earth’s crust, of which it represents approximately 8%, ranking after oxygen and silicon. It exists mainly as oxides. In terrestrial environments, aluminum commonly exists as secondary (authigenic) hydroxide or aluminosilicate minerals, mainly clays. These minerals are highly insoluble at neutral pH. However, aluminum occurs in detectable amounts in natural waters, due to leaching of the soil minerals in acidic conditions. Soil acidity may have a natural origin, such as an acidic (silicic) mother rock, melted snow, dissolved carbonic acid, or biologically generated organic acids. During the past two decades, it has been demonstrated that one of the major origins of increased aluminum mobilization and transport in forested soils is introduction of strong acid through atmospheric sulfur and nitrogen deposition. It has also been shown that aqueous aluminum is the biogeochemical link between atmospheric pollution and damage caused to tree roots and aquatic organisms such as plankton, crustaceans, insects, and fish. Biological studies have shown that the different aluminum species exhibit various toxicities: the most toxic are the monomeric and the polynuclear species; complexation with organic acids results in low toxicity. The significance of aluminum to human health has long been regarded as negligible. There is a possible link between high-level aluminum contamination by renal dialysis or hemodialysis, and neurodegenerative health disorders such as Parkinson’s or Alzheimer’s diseases, but the part played by aluminum is not clear. However, since aluminum salts are used on an industrial level as coagulants and flocculants in water treatment, the aluminum concentration and speciation in drinking water deserve careful monitoring. Because of the specific toxicity of the aluminum species, there has been considerable concern in the past two decades over the speciation of aqueous aluminum present in soils and aquatic systems. To this end, several techniques have been developed ... Book Part Carbonic acid Oxford University Press (via Crossref) |
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Aluminum is the most abundant metal of the Earth’s crust, of which it represents approximately 8%, ranking after oxygen and silicon. It exists mainly as oxides. In terrestrial environments, aluminum commonly exists as secondary (authigenic) hydroxide or aluminosilicate minerals, mainly clays. These minerals are highly insoluble at neutral pH. However, aluminum occurs in detectable amounts in natural waters, due to leaching of the soil minerals in acidic conditions. Soil acidity may have a natural origin, such as an acidic (silicic) mother rock, melted snow, dissolved carbonic acid, or biologically generated organic acids. During the past two decades, it has been demonstrated that one of the major origins of increased aluminum mobilization and transport in forested soils is introduction of strong acid through atmospheric sulfur and nitrogen deposition. It has also been shown that aqueous aluminum is the biogeochemical link between atmospheric pollution and damage caused to tree roots and aquatic organisms such as plankton, crustaceans, insects, and fish. Biological studies have shown that the different aluminum species exhibit various toxicities: the most toxic are the monomeric and the polynuclear species; complexation with organic acids results in low toxicity. The significance of aluminum to human health has long been regarded as negligible. There is a possible link between high-level aluminum contamination by renal dialysis or hemodialysis, and neurodegenerative health disorders such as Parkinson’s or Alzheimer’s diseases, but the part played by aluminum is not clear. However, since aluminum salts are used on an industrial level as coagulants and flocculants in water treatment, the aluminum concentration and speciation in drinking water deserve careful monitoring. Because of the specific toxicity of the aluminum species, there has been considerable concern in the past two decades over the speciation of aqueous aluminum present in soils and aquatic systems. To this end, several techniques have been developed ... |
format |
Book Part |
author |
Thomas, Fabien Masion, Armand |
spellingShingle |
Thomas, Fabien Masion, Armand 27Al NMR Study of the Hydrolysis and Condensation of Organically Complexed Aluminum |
author_facet |
Thomas, Fabien Masion, Armand |
author_sort |
Thomas, Fabien |
title |
27Al NMR Study of the Hydrolysis and Condensation of Organically Complexed Aluminum |
title_short |
27Al NMR Study of the Hydrolysis and Condensation of Organically Complexed Aluminum |
title_full |
27Al NMR Study of the Hydrolysis and Condensation of Organically Complexed Aluminum |
title_fullStr |
27Al NMR Study of the Hydrolysis and Condensation of Organically Complexed Aluminum |
title_full_unstemmed |
27Al NMR Study of the Hydrolysis and Condensation of Organically Complexed Aluminum |
title_sort |
27al nmr study of the hydrolysis and condensation of organically complexed aluminum |
publisher |
Oxford University Press |
publishDate |
1997 |
url |
http://dx.doi.org/10.1093/oso/9780195097511.003.0015 |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_source |
Nuclear Magnetic Resonance Spectroscopy in Environment Chemistry |
op_doi |
https://doi.org/10.1093/oso/9780195097511.003.0015 |
_version_ |
1766388078588461056 |