Aqueous Polynuclear Aluminum Species
Paul M. Bertsch and David R. Parker
The hydrolytic products of Al are believed to be important in mineral phase
formation and transitions, in the mobility of Al in soils and aquatic systems, and in
the toxicity of Al to plants and aquatic organisms.1-9 In addition to their potential
significance natural systems, polynuclear forms of Al are known to be important in
water treatment applications, as a primary constituent in several pharmaceuticals,
and as a principal component in certain catalysts.10-15 Aluminum may also be
directly or indirectly involve in a number of human health disorders, including
dialysis dementia, senile and presenile dementia of the Alzheimer type,
osteodystrophy, and osteomalocia; 16,17 only recently have polynuclear complexes
been considered in this context18
The purposes of this chapter are to provide an overview of the hydrolytic
reactions of Al in aqueous solutions, to present the salient features of polynuclear
Al structures, to evaluate current methods of detecting and quantifying polynuclear
forms of Al, to discuss the mechanisms of their formation, and finally, to discuss
certain implications of the polynuclear Al species to soil-water systems.
SREL Reprint #2000
Bertsch, P.M. and D.R. Parker. 1996. Aqueous polynuclear aluminum species. p.
117-168. In The Environmental Chemistry of Aluminum, edited by G. Sposito.
2nd ed.,CRC Press. Boca Raton, FL.
To request a reprint