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Early breakthrough of colloids and bacteriophage MS2 in a water-saturated sand column

Chrysikopoulos Constantinos, Arturo A. Keller , Sanya Sirivithayapakorn

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URIhttp://purl.tuc.gr/dl/dias/818810E1-D836-40C7-9427-AD8677B6BFFF-
Αναγνωριστικόhttps://doi.org/10.1029/2003WR002676 -
Γλώσσαen-
Μέγεθος11 pagesen
ΤίτλοςEarly breakthrough of colloids and bacteriophage MS2 in a water-saturated sand columnen
ΔημιουργόςChrysikopoulos Constantinosen
ΔημιουργόςΧρυσικοπουλος Κωνσταντινοςel
ΔημιουργόςArturo A. Keller en
ΔημιουργόςSanya Sirivithayapakornen
ΠερίληψηWe conducted column-scale experiments to observe the effect of transport velocity and colloid size on early breakthrough of free moving colloids, to relate previous observations at the pore scale to a larger scale. The colloids used in these experiments were bacteriophage MS2 (0.025 mm), and 0.05- and 3-mm spherical polystyrene beads, and were compared with a conservative nonsorbing tracer (KCl). The results show that early breakthrough of colloids increases with colloid size and water velocity, compared with the tracer. These results are in line with our previous observations at the pore scale that indicated that larger colloids are restricted by the size exclusion effect from sampling all paths, and therefore they tend to disperse less and move in the faster streamlines, if they are not filtered out. The measured macroscopic dispersion coefficient decreases with colloid size due to the preferential flow paths, as observed at the pore scale. Dispersivity, typically considered only a property of the medium, is in this case also a function of colloid size, in particular at low Peclet numbers due to the size exclusion effect. Other parameters for colloid transport, such as collector efficiency and colloid filtration rates, were also estimated from the experimental breakthrough curve using a numerical fitting routine. In general, we found that the estimated filtration parameters follow the clean bed filtration model, although with a lower filtration efficiency overall.en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2015-09-20-
Ημερομηνία Δημοσίευσης2004-
Βιβλιογραφική ΑναφοράC. V. Chrysikopoulos,A. A. Keller ,S. Sirivithayapakorn , "Early breakthrough of colloids and bacteriophage MS2 in a water-saturated sand column", Wat.Resourc. Re.,vol.40,no. 8,2004.doi :10.1029/2003WR002676 en

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