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Adsorption Kinetics of Bacteriophage X-174 on Soil¹

ABSTRACT

The adsorption of bacteriophage X-174 by a soil followed classical square-root-of-time kinetics, indicating that the rate of adsorption was controlled by diffusion. These results, however, are explained by the heterogeneity of the virus population relative to adsorption rate. The presence of at least two virus populations distinguishable by the rates at which they are adsorbed by the soil and desorption of the adsorbed virus upon dilution are demonstrated experimentally.

Key Words: adsorption rate • diffusion • virus • Brownian motion

¹ Contribution from the Agric. Environ. Qual. Inst., SEA-USDA, Beltsville, MD 20705.

² Soil Scientist and Microbiologist, respectively.

Received for publication January 7, 1978.

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