Exchange and solution phase chemistry of acid, highly weathered soils. II.* Investigation of mechanisms controlling a1 release into solution

Menzies, N. W., Bell, L. C. and Edwards, D. G. (1994) Exchange and solution phase chemistry of acid, highly weathered soils. II.* Investigation of mechanisms controlling a1 release into solution. Australian Journal of Soil Research, 32 2: 269-283. doi:10.1071/SR9940269


Author Menzies, N. W.
Bell, L. C.
Edwards, D. G.
Title Exchange and solution phase chemistry of acid, highly weathered soils. II.* Investigation of mechanisms controlling a1 release into solution
Journal name Australian Journal of Soil Research   Check publisher's open access policy
ISSN 0004-9573
Publication date 1994-01-01
Sub-type Article (original research)
DOI 10.1071/SR9940269
Open Access Status Not yet assessed
Volume 32
Issue 2
Start page 269
End page 283
Total pages 15
Language eng
Subject 2304 Environmental Chemistry
1111 Soil Science
Abstract Soil solid phase and soil solution characteristics were evaluated on surface and subsoil horizons of 60 acid, highly weathered soils in the unamended state, and on a subset of 39 surface horizons following the addition of CaS04-2H20. The activity of Al3+ was found to be strongly correlated with the soil solution pH, with Al3+ activity increasing as pH decreased. For surface soils in the unamended state, and for the majority of subsoils, the Al3+ activity calculated was comparable to the theoretical activity supported by the dissolution of gibbsite (AI2O3 -3H20). The Al3+ activity in CaSC>4.2H20-amended samples tended to fall below that maintained by gibbsite dissolution and was more closely correlated with the Al3+ activity supported by the dissolution of jurbanite (AISO4 (OH)-50).
Keyword Aluminium solubility
Gibbsite
Jurbanite
Soil solution
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
 
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