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Mechanism of formation of humus coatings on mineral surfaces 3. Composition of adsorbed organic acids from compost leachate on alumina by solid-state 13C NMR

Colloids and Surfaces A: Physicochemical and Engineering Aspects

By:
, , and
DOI: 10.1016/0927-7757(95)03402-1

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Abstract

The adsorption of compost leachate DOC on alumina is used as a model for elucidation of the mechanism of formation of natural organic coatings on hydrous metal oxide surfaces in soils and sediments. Compost leachate DOC is composed mainly of organic acid molecules. The solid-state 13C NMR spectra of these organic acids indicate that they are very similar in composition to aquatic humic substances. Changes in the solid-state 13C NMR spectra of compost leachate DOC fractions adsorbed on alumina indicate that the DOC molecules are most likely adsorbed on metal oxide surfaces through a combination of polar and hydrophobic interaction mechanisms. This combination of polar and hydrophobic mechanism leads to the formation of bilayer coatings of the leachate molecules on the oxide surfaces.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Mechanism of formation of humus coatings on mineral surfaces 3. Composition of adsorbed organic acids from compost leachate on alumina by solid-state 13C NMR
Series title:
Colloids and Surfaces A: Physicochemical and Engineering Aspects
DOI:
10.1016/0927-7757(95)03402-1
Volume
108
Issue:
2-3
Year Published:
1996
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Colloids and Surfaces A: Physicochemical and Engineering Aspects
First page:
213
Last page:
223
Number of Pages:
11