Solubility of simple aluminium compounds expected in soils. IV. Reactions of aluminium hydroxide under acid conditions
- 1 January 1963
- journal article
- research article
- Published by CSIRO Publishing in Soil Research
- Vol. 1 (1) , 55-62
- https://doi.org/10.1071/sr9630055
Abstract
Solubility constants for aluminium hydroxides and oxyhydroxides previously obtained (Raupach 1963a) were supported by further studies at 20� and 50�. Polymeric aluminium ions were not present in systems obeying Ks1 = -log [ AlOH2+) (OH-) 2] = 23.31 at 25�C When 5 < -log [AlOH2+] < 3 no Al3+ ions are found in solution because the aluminium hydroxide surface readily binds Al3' ions, produced slowly in solution, and releases AlOH2+ ions. This also happens in soil solutions.Keywords
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