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| Titel |
Effect of aquatic chemistry on virus sorption onto kaolinite and bentonite |
| VerfasserIn |
Vasiliki I. Syngouna, Constantinos V. Chrysikopoulos |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250037501
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| Zusammenfassung |
| Bacteriophage MS2 and ΦX174 were used as surrogates for human viruses in order to
investigate the interaction between viruses and clay particles. The selected phyllosilicate
clays were kaolinite and bentonite. Numerous reactor vessels were filled with 0.5 g of clay
and 50 mL of sterile phosphate buffered at pH 7.0. A series of static and dynamic
experiments for various bacteriophage concentrations were conducted at two different
temperatures. Half of the reactor vessels were placed in a refrigerator at 4 Ë C and the rest in
a constant temperature room at 25 Ë C. The dynamic batch experiments were performed with
the reactor vessels attached to a small bench-top tube rotator. Appropriate adsorption
isotherms were determined. Subsequently, the Derjaguin-Landau-Verwey-Overbeek theory
was applied in order to determine the interaction energies between the bacteriophage and clay
surfaces. The electric properties of the viral surfaces were also obtained at different pH
values and ionic strength levels. The experimental results show that virus adsorption
increases linearly with suspended virus concentration. The observed distribution
coefficient (Kd) was higher for MS2 than ΦX174. Also, the observed Kd values were
higher for the dynamic than static experiments, and increased with temperature.
Moreover, the results indicate that the electrostatic interactions between viruses
and the clays are significantly influenced by the solution’s ionic strength and pH.
At pH 7, bacteriophage-clay energy barriers were higher for MS2 than ΦX174. |
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