Attenuation and colloidal mobilization of bacteriophages in natural sediments under anoxic as compared to oxic conditions

The Science of the Total Environment
Sondra KlitzkeIngrid Chorus

Abstract

Redox conditions are known to affect the fate of viruses in porous media. Several studies report the relevance of colloid-facilitated virus transport in the subsurface, but detailed studies on the effect of anoxic conditions on virus retention in natural sediments are still missing. Therefore, we investigated the fate of viruses in natural flood plain sediments with different sesquioxide contents under anoxic conditions by considering sorption to the solid phase, sorption to mobilized colloids, and inactivation in the aqueous phase. Batch experiments were conducted under oxic and anoxic conditions at pH values between 5.1 and 7.6, using bacteriophages MS2 and PhiX174 as model viruses. In addition to free and colloid-associated bacteriophages, dissolved and colloidal concentrations of Fe, Al and organic C as well as dissolved Ca were determined. Results showed that regardless of redox conditions, bacteriophages did not adsorb to mobilized colloids, even under favourable charge conditions. Under anoxic conditions, attenuation of bacteriophages was dominated by sorption over inactivation, with MS2 showing a higher degree of sorption than PhiX174. Inactivation in water was low under anoxic conditions for both bacteriophages with ab...Continue Reading

References

Mar 5, 2005·Applied and Environmental Microbiology·W J Lodder, A M de Roda Husman
May 5, 2005·Water Research·W Joshua WeissKellogg J Schwab
Jul 9, 2008·Environmental Science & Technology·Paul W J J Van der WielenGertjan Medema
Jan 28, 2010·Journal of Applied Microbiology·B Michen, T Graule
Feb 23, 2010·Water Research·Monica B Emelko, Nathalie Tufenkji
Jul 16, 2014·International Journal of Hygiene and Environmental Health·Anne FrohnertHans-Christoph Selinka

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