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BACTERIOPHAGE PRD1 AND SILICA COLLOID TRANSPORT AND RECOVERY IN AN IRON OXIDE-COATED SAND AQUIFER. (R826179)
Citation:
Ryan, J. N., M. Elimelech, R. A. Ard, R. W. Harvey, AND P. R. Johnson. BACTERIOPHAGE PRD1 AND SILICA COLLOID TRANSPORT AND RECOVERY IN AN IRON OXIDE-COATED SAND AQUIFER. (R826179). ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 33:63-73, (1999).
Description:
Bacteriophage PRD1 and silica colloids were co-injected into
sewage-contaminated and uncontaminated zones of an iron oxide-coated sand
aquifer on Cape Cod, MA, and their transport was monitored over distances up to
6 m in three arrays. After deposition, the attached PRD1 and silica colloids
were mobilized by three different chemical perturbations (elevated pH, anionic
surfactant, and reductant). PRD1 and silica colloids experienced less
attenuation in the contaminated zone where adsorbed organic matter and phosphate
may be hindering attachment of PRD1 and silica colloids to the iron oxide
coatings. The PRD1 collision efficiencies agree well with collision efficiencies
predicted by assuming favorable PRD1 deposition on iron oxide coatings for which
the surface area coverage was measured by microprobe analysis of sediment thin
sections. 
potentials of the PRD1,
silica colloids, and aquifer grains corroborated the transport results,
indicating that electrostatic forces dominated the attachment of PRD1 and silica
colloids. Elevated pH was the chemical perturbation most effective at mobilizing
the attached PRD1 and silica colloids. Elevated surfactant concentration
mobilized the attached PRD1 and silica colloids more effectively in the
contaminated zone than in the uncontaminated zone.