Journal ArticleDOI
Aluminium precipitates from groundwater of an aquifer affected by acid atmospheric deposition in the Senne, Northern Germany.
Anke Lükewille,Nico Van Breemen +1 more
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TLDR
In this article, it was shown that amorphous aluminium hydroxide can be formed instead of jurbanite from solid phase analysis, which is not supported by evidence from solid phases.Abstract:
White precipitates collected from stream bottoms and well tubes in the Senne area consist of amorphous aluminium hydroxide, coprecipitated with minor amounts of sulfate, phosphate and silica. The precipitates have presumably formed by the interaction of slightly alkaline water from calcareous subsoil sediments, with acidic water draining off sandy soils affected by high inputs of acidic atmospheric deposition. From many hydrochemical studies, precipitation of aqueous aluminium is known to occur in subsurface horizons of acid soils affected by acid rain. On the basis of presumed equilibrium with soil solutions, jurbanite, AlOHSO4 · 5H2O, is often assumed to be the secondary mineral involved. However, direct evidence for jurbanite from solid phase analysis is lacking. This first analysis of such a secondary phase does not support the jurbanite hypothesis, and shows that amorphous Al hydroxide can be formed instead.read more
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The speciation and physico-chemical forms of metals in surface waters and sediments
Jacek Namieśnik,Anna Rabajczyk +1 more
TL;DR: The physical and chemical properties of aquatic ecosystems are characterized by a number of interdependent parameters, such as temperature, oxygen content and pH of a water body can alter the solubility of the salts present in it, the forms of occurrence of particular species, as well as....
Journal ArticleDOI
Mineral species control of aluminum solubility in sulfate-rich acidic waters
TL;DR: In this article, the authors used XANES spectroscopy to determine the mineral species controlling the solubility of Al draining from acid sulfate soils into Blacks Drain in north-eastern New South Wales, Australia.
Journal ArticleDOI
Study of aluminium concentration and speciation of surface water in four catchments in the Limousin region (France).
Gilles Guibaud,Cécile Gauthier +1 more
TL;DR: High concentrations of total aluminium at low pH (close to or lower than 6), the monomeric toxic forms of aluminium, computed with a speciation software, are always inferior to the toxic values for fish.
Journal ArticleDOI
Aluminum mobility in mildly acidic mine drainage: Interactions between hydrobasaluminite, silica and trace metals from the nano to the meso-scale
Manuel A. Caraballo,Manuel A. Caraballo,Richard B. Wanty,Philip L. Verplanck,Leonardo Navarro-Valdivia,Carlos Ayora,Michael F. Hochella +6 more
TL;DR: In this paper, three connected but discernible aluminum precipitation stages were identified and described: 1) nanoparticle formation and size decrease along the creek, 2) hydrobasaluminite neoformation on the riverbed, and 3) precipitate accretion and accumulation leading to Al and Fe banded formations.
Journal ArticleDOI
Detecting Small-Scale Variability of Trace Elements in a Shallow Aquifer
TL;DR: In this paper, the authors analyzed groundwater samples collected from an unconfined shallow aquifer for major and trace element (TE) concentrations with the aim of investigate small-scale variations possibly linked to fertilizer residual products applied until 2004.
References
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BookDOI
Effects of the Accumulation of Air Pollutants in Forest Ecosystems.
Journal ArticleDOI
The effect of sulfate on aluminum concentrations in natural waters: some stability relations in the system Al2O3-SO3-H2O at 298 K
TL;DR: In this article, the solubility and stability relations among these four minerals and gibbsite are plotted as a function of pH and sulfate activity at 298 K. These equilibrium calculations predict that both sulfate and aluminum can be immobilized in acid waters by the precipitation of aluminum hydroxysulfate minerals.
Journal ArticleDOI
Aluminum toxicity and forest decline.
TL;DR: Using x-ray microanalysis, the distribution of Al, Mg, Ca, and K was found to be similar in roots of Picea abies seedlings grown in solution culture and in roots collected from declining spruce stands.
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