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

This Article Abstract 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 Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (1) Citing Articles via Google Scholar Google Scholar Articles by Shira, J. M. Articles by Tuller, M. Search for Related Content PubMed PubMed Citation Articles by Shira, J. M. Articles by Tuller, M. Agricola Articles by Shira, J. M. Articles by Tuller, M. Related Collections Colloid-Facilitated Transport Vadose Zone Processes and Chemical Transport

Sampling Silica and Ferrihydrite Colloids with Fiberglass Wicks under Unsaturated Conditions

^a Department of Environmental Science, University of Idaho, Moscow, ID 83844
^b Current address: Washington State Department of Ecology, Olympia, WA 98504
^c Department of Biological and Agricultural Engineering, University of Idaho, Moscow, ID 83844-0904
^d Department of Crop and Soil Sciences, Center for Multiphase Environmental Research, Washington State University, Pullman, WA 99164
^e Current address: Department of Physical Geography, Geographical Institute, University of Pécs, Hungary
^f Soils and Land Resources Division, University of Idaho, Moscow, ID 83844-2339

View larger version (31K): [in a new window]   Fig. 1. Setup for unsaturated wick colloid transport experiments.

View larger version (132K): [in a new window]   Fig. 2. Scanning electron microscopy (SEM) image of fiberglass wick after cleaning process; notice impurity on one fiber after cleaning, which indicates that the cleaning process is not complete.

View larger version (23K): [in a new window]   Fig. 3. Liquid retention curve for fiberglass wick. Symbols are measured data, line is fitted van Genuchten relationship. Main hysteresis loop of retention curve is shown for drying limb only.

View larger version (17K): [in a new window]   Fig. 4. Vertical moisture profiles in fiberglass wick.

View larger version (22K): [in a new window]   Fig. 5. Breakthrough curves for nitrate and silica microspheres at different flow rates.

View larger version (19K): [in a new window]   Fig. 6. Breakthrough curves for ferrihydrite colloids at pH 4 (three replicates).

View larger version (28K): [in a new window]   Fig. 7. Conceptual depiction of fiberglass wick pore geometry; shading indicates degree of staining by ferrihydrite. Filament diameter measured with scanning electron microscopy–energy dispersive spectrometry (SEM–EDS).