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IRON AND ALUMINIUM AS CEMENTING SUBSTANCES OF SOIL AGGREGATES
Author(s) -
GIOVANNINI G.,
SEQUI P.
Publication year - 1976
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1976.tb01985.x
Subject(s) - acetylacetone , aluminium , extraction (chemistry) , benzene , dispersion (optics) , soil water , chemistry , organic matter , particle size distribution , particle size , environmental chemistry , inorganic chemistry , organic chemistry , soil science , geology , physics , optics
Summary Extraction of five soils with acetylacetone in benzene does not change their particle‐size distribution, compared with no pre‐treatment or dispersion, but it decreases the water stability of soil aggregates. The decrease is closely related to the extent of the extraction of iron and aluminium by acetylacetone in benzene from soils. The metals extracted by acetylacetone are essentially bound to the organic matter. It is suggested they behave as junctions of a net composed of polymeric chains of soil organic matter. The mesh, which exerts a protective action on soil aggregates, is weakened at the junctions of polymeric chains after the removal of metals so that the stability to the disrupting action of water is decreased.