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Aluminium activity in soil solution and mineral stability in soils from Galicia (NW Spain)

Published online by Cambridge University Press:  09 July 2018

R. Calvo
Affiliation:
Departamento de Edafología, Facultad de Biología, Universidad de Santiago, Spain
E. Alvarez
Affiliation:
Departamento de Edafología, Facultad de Biología, Universidad de Santiago, Spain

Abstract

Solutions obtained from soils in the Galicia Region of NW Spain had considerably lower activities of Al3+ when obtained by a speciation procedure (fractionation with an ionic column and application of specific software) than when obtained from concentrations of reactive Al (colorimetry with pyrocatechol violet) by a calculation that only considers simple hydroxylated species. Using the speciation method, many of the solutions obtained from surface horizons are unsaturated for most minerals, especially in granitic areas.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1992

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