Αναζήτηση

Πλοήγηση

• Κοινότητες
• Συγγραφείς
• Έτος
• Τίτλοι
• Θέματα

Ο Χώρος μου

• Είσοδος

Transport of biocolloids in water saturated columns packed with sand: Effect of grain size and pore water velocity

Chrysikopoulos Constantinos, Vasiliki I. Syngouna

Πλήρης Εγγραφή

---

Περίληψη

The main objective of this study was to evaluate the combined effects of grain size and porewater velocity on the transport in water saturated porous media of three waterborne fecal indicatororganisms (Escherichia coli, MS2, and ΦX174) in laboratory-scale columns packed withclean quartz sand. Three different grain sizes and three pore water velocities were examinedand the attachment behavior of Escherichia coli, MS2, and ΦX174 onto quartz sand was evaluated.The mass recoveries of the biocolloids examined were shown to be highest for Escherichiacoli and lowest for MS2. However, no obvious relationships between mass recoveries andwater velocity or grain size could be established from the experimental results. The observedmean dispersivity values for each sand grain size were smaller for bacteria than coliphages, buthigher for MS2 than ΦX174. The single collector removal and collision efficiencies were quantifiedusing the classical colloid filtration theory. Furthermore, theoretical collision efficiencieswere estimated only for E. coli by the Interaction-Force-Boundary-Layer, and Maxwell approximations.Better agreement between the experimental and Maxwell theoretical collision efficiencieswere observed.

Διαθέσιμα αρχεία

Υπηρεσίες