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Applied and Environmental Microbiology, January 2006, p. 665-671, Vol. 72, No. 1
0099-2240/06/$08.00+0     doi:10.1128/AEM.72.1.665-671.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

Leaching of Phage from Class B Biosolids and Potential Transport through Soil

Alexandra S. Chetochine, Mark L. Brusseau, Charles P. Gerba, and Ian L. Pepper*

The University of Arizona, Department of Soil, Water and Environmental Science, 429 Shantz Building #38, Tucson, Arizona 85721

Received 21 March 2005/ Accepted 10 October 2005

The objective of this study was to investigate leaching and transport of viruses, specifically those of an indigenous coliphage host specific to Escherichia coli ATTC 15597 (i.e., MS-2), from a biosolid-soil matrix. Serial extractions of 2% and 7% (solids) class B biosolid matrices were performed to determine the number of phage present in the biosolids and to evaluate their general leaching potential. Significant concentrations of coliphage were removed from the biosolids for each sequential extraction, indicating that many phage remained associated with the solid phase. The fact that phage was associated with or attached to solid particles appeared to influence the potential for release and subsequent transport of phage under saturated-flow conditions, which was examined in a series of column experiments. The results indicated that less than 8% of the indigenous coliphage initially present in the biosolids leached out of the biosolid-soil matrix. A fraction of this was subsequently transported through the sandy porous medium with minimal retention. The minimal retention observed for the indigenous phage, once released from the biosolids, was consistent with the results of control experiments conducted to examine MS-2 transport through the porous medium.

* Corresponding author. Mailing address: The University of Arizona, Tucson, AZ 85706. Phone: (520) 626-3328. Fax: (520) 573-0852. E-mail: ipepper{at}ag.arizona.edu

Applied and Environmental Microbiology, January 2006, p. 665-671, Vol. 72, No. 1
0099-2240/06/$08.00+0     doi:10.1128/AEM.72.1.665-671.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Tanner, B. D., Brooks, J. P., Gerba, C. P., Haas, C. N., Josephson, K. L., Pepper, I. L. (2008). Estimated Occupational Risk from Bioaerosols Generated during Land Application of Class B Biosolids. J. Environ. Qual. 37: 2311-2321 [Abstract] [Full Text]  
  • Pepper, I. L., Zerzghi, H., Brooks, J. P., Gerba, C. P. (2008). Sustainability of Land Application of Class B Biosolids. J. Environ. Qual. 37: S-58-S-67 [Abstract] [Full Text]  


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