A field example of bacteriophage as tracers of fracture flow
Article Abstract:
Research using bacteriophages MS-2 and PRD-1 in a trench-to-trench lateral groundwater flow and trace migration experiment indicates that there are clear differences in behaviour between bacteriophages and dissolved tracers in water-saturated fractured clay. This is the first time that the extent of flow velocity in fractures in clay has been studied effectively, and shows that it is possible for colloid-sized contaminants and contaminants adhering to colloids to migrate very quickly in fractured clays. Research was carried out at the Laidlaw industrial waste treatment site in SW Ontario.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1993
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Comment on "Investigation of a Sequential Filtration Technique for Particle Fractionation." (article by I.G. Droppo, B.G. Krishnappan, S.S. Rao and E.D. Ongley, Environmental Science and Technology, vol. 29, p. 546, 1995)(includes reply)
Article Abstract:
Droppo and his colleagues erroneously identify factors such as sediment and pore geometry, pore clogging and the flocculation and disaggregation process as the main influences for broad particle sizes from separations. The main factor affecting accuracy of size separations is that particle filtration does not occur only by straining. Filtration theory can explain for the inaccurate size distributions observed in their experiment.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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Comment on "application of clean-bed filtration theory to bacterial deposition in porous media." (Correspondence)
Article Abstract:
The inherent uncertainty in all efforts to measure culturable bacteria makes it unlikely that results from column studies can be used to make a reliable estimate of their collision efficiency. Although the rotating disk device is an innovative tool for estimating bacterial collision efficiencies, the low values obtained disprove claims that filtration theory can be a basis for modeling bacterial attenuation.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1993
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