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Appl Environ Microbiol. 1989 August; 55(8): 2061-2067
Copyright © 1989, American Society for Microbiology. All Rights Reserved.

Bacteriophage Transport in Sandy Soil and Fractured Tuff

Roger C. Bales^*, Charles P. Gerba, Gerald H. Grondin and Stephen L. Jensen

¹ Department of Hydrology and Water Resources and Department of Microbiology and Immunology, ² University of Arizona, Tucson, Arizona 85721

ABSTRACT

Bacteriophage transport was investigated in laboratory column experiments using sandy soil, a controlled field study in a sandy wash, and laboratory experiments using fractured rock. In the soil columns, the phage MS-2 exhibited significant dispersion and was excluded from 35 to 40% of the void volume but did not adsorb. Dispersion in the field was similiar to that observed in the laboratory. The phage f2 was largely excluded from the porous matrix of the two fractured-rock cores studied, coming through 1.2 and 2.0 times later than predicted on the basis of fracture flow alone. Because of matrix diffusion, nonsorbing solutes were retarded by over a factor of three relative to fracture flow. The time for a solute tracer to equilibrate with the porous matrix of 6.5-cm-diameter by 25-cm-long cores was measured in days. Results of both granular-medium and fractured-rock experiments illustrate the inability of a solute tracer to provide estimates for dispersion and effective porosity that are applicable to a colloid. Bacteriophage can be used to better estimate the maximum subsurface transport rate of colloidal contaminants through a porous formation.

^* Corresponding author.

Present address: Oregon Water Resources Department. Salem. OR 97310.

Present address: 5703 Jordan Avenue, El Cerrito, CA 94530.

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