Journal Article

PreJuSER-497

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Physicochemical characterization of potential colloids from agricultural topsoils

Séquaris, J.-M.FZJ* ; Lewandowski, H.FZJ*

2003
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/S0927-7757(02)00563-0

Abstract: A method based on sedimentation and centrifugation steps has been developed to fractionate agricultural topsoils after suspension in water. A high release of potential colloids has been observed with low Ca2+ concentration under soil solid-to-water weight ratio conditions higher than 1/3. The colloidal stability is characterized in terms of particle size and electrokinetic properties. There is no systematic effect of the colloid phase organic carbon content varying from 2 to 5% on the critical coagulation concentration (CCC) and zeta potential results. Consequently, the observed CCC was tested by the Derjaguin-Landau-Verwey-Overbeeck theory by taking into account physicochemical properties of the colloid phase mineral content. (C) 2002 Elsevier Science B.V. All rights reserved.

Keyword(s): J ; agricultural topsoils (auto) ; soil fractionation (auto) ; potential colloid (auto) ; critical coagulation concentration (auto) ; zeta potential (auto) ; colloidal stability (auto)

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Agrosphäre (ICG-IV)

Research Program(s):

1. Chemie und Dynamik der Geo-Biosphäre (U01)

Appears in the scientific report 2003

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