HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (10) Citing Articles via Google Scholar Google Scholar Articles by Rousseau, M. Articles by Cabibel, B. Search for Related Content PubMed Articles by Rousseau, M. Articles by Cabibel, B. GeoRef GeoRef Citation Agricola Articles by Rousseau, M. Articles by Cabibel, B. Related Collections Vadose Zone Processes and Chemical Transport Colloids

ORIGINAL RESEARCH PAPERS

Preferential Transport of Soil Colloidal Particles

Physicochemical Effects on Particle Mobilization

^a Institut National de la Recherche Agronomique–Unité Climat, Sol et Environnement, Domaine St. Paul, 84914 Avignon Cedex 9, France
^b Laboratoire d'étude des Transferts en Hydrologie et Environnement, Domaine Universitaire, B.P. 53, 38041 Grenoble Cedex 9, France
^c Institut National de la Recherche Agronomique–Unité de Science du Sol, Route de Saint Cyr, 78026 Versailles Cedex, France
^* Corresponding author (angulo{at}hmg.inpg.fr).

Received 14 February 2003.

The quantification of particle transport through soil is of great importance for estimating the potential risk of adsorbing contaminants leaching into groundwater. In the present study, we investigated the mobilization of natural soil particles in an undisturbed soil column (diameter = 0.3 m, height = 0.66 m). We tested the effects of physicochemical properties of soil and infiltrating water on the mobilization and transport of soil particles. A square pulse of water was applied at the top of the column. Water was allowed to drain freely at the bottom of the column. We tested two rainfall intensities (11 and 23 mm h^–1), three ionic strengths (10^–5, 10^–3, and 10^–1 M), and two initial moisture contents (0.34 and 0.38 m³ m^–3). For the whole set of infiltration experiments, the concentration of eluted particles was correlated with the drainage flow intensity, particularly during transient flow. Particle leaching during steady flow varied with the boundary and initial conditions. The highest mobilization of particles was observed for deionized water, the highest infiltration rate and the highest initial soil moisture content. Particle mobilization was limited for high ionic strength associated with the divalent cation Mg²⁺. During transient flow, mechanical detachment by hydrodynamic shear could lead to particle mobilization. During steady flow, the ionic strength of the incoming solution may alter the energy potential at the soil–water interface, and thus have an effect on the mobilization rate as well.

Abbreviations: DDL, double diffuse layer • FWHM, full width at half maximum • TOC, total organic C • XRD, X-ray diffraction

This article has been cited by other articles:

				K. U. Totsche, S. Jann, and I. Kogel-Knabner Single Event-Driven Export of Polycyclic Aromatic Hydrocarbons and Suspended Matter from Coal Tar-Contaminated Soil Vadose Zone J., April 9, 2007; 6(2): 233 - 243. [Abstract] [Full Text] [PDF]