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 Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (8) Citing Articles via Google Scholar Google Scholar Articles by Perret, J. Articles by Langford, C. Search for Related Content PubMed Articles by Perret, J. Articles by Langford, C. GeoRef GeoRef Citation Agricola Articles by Perret, J. Articles by Langford, C.

Preferential Solute Flow in Intact Soil Columns Measured by SPECT Scanning

^a Dep. of Agric. and Biosyst. Eng., McGill Univ., 21111 Lakeshore Road, Ste-Anne-de-Bellevue, QC, Canada H9X-3V9
^b Dep. of Chem. and Petrol. Eng., Univ. of Calgary, 2500 University Dr. N.W., Calgary, AB, Canada T2N-1N4
^c TIPM Lab., Univ. of Calgary, 2500 University Dr. N.W., Calgary, AB, Canada T2N-1N4
^d Dep. of Chemistry, Univ. of Calgary, 2500 University Dr. N.W., Calgary, AB, Canada T2N-1N4

View larger version (119K): [in a new window]   Fig. 1 Siemens Orbiter gamma camera at the Tomographic Imaging and Porous Media Laboratory in Calgary, AB

View larger version (33K): [in a new window]   Fig. 2 Basic principles and components of a gamma camera

View larger version (132K): [in a new window]   Fig. 3 Rotation of the gamma camera around a column of soil

View larger version (15K): [in a new window]   Fig. 4 Comparison of the radioactivity level of Tc in water and in soil at different concentrations

View larger version (68K): [in a new window]   Fig. 5 Schematic representation of the distribution of the radioactive tracer in the top region of one of the soil columns

View larger version (53K): [in a new window]   Fig. 6 Three-dimensional representation of 99mTc distribution at different times after injection: (a) 25 s, (b) 50 s, (c) 75 s, (d) 100 s, (e) 125 s, (f) 150 s, (g) 200 s, (h) 300 s, (i) 400 s, (j) 500 s, (k) 750 s, and (l) 1000 s in Column 1

View larger version (96K): [in a new window]   Fig. 7 Relation between 3-D macropore space and tracer distribution. Three-dimensional reconstructions of macropore networks are shown for (a) Column 1 and (c) Column 4. The spatial distributions of the tracer were evaluated at (b) 165 s in Column 1 and (d) 80 s in Column 4 after tracer injection

View larger version (78K): [in a new window]   Fig. 8 Three-dimensional reconstructions of the tracer distribution in Column 4 obtained by SPECT scanning. The reconstructions represent 3-D tracer distribution at different times after injection: (a) 2 min, (b) 4 min, (c) 6 min, (d) 8 min, (e) 10 min, (f) 12 min, (g) 14 min, (h) 16 min, and (i) 18 min

View larger version (16K): [in a new window]   Fig. 9 Breakthrough curves observed in the effluent of Columns 1, 2, and 3