Effect of surface coatings, grain size, and ionic strength on the maximum attainable coverage of bacteria on sand surfaces

摘要

The injection of bacteria in the subsurface has been identified as a potential method for in situ cleanup of contaminated aquifers. For high bacterial loadings, the presence of previously deposited bacteria can result in decreased deposition rates - a phenomenon known as blocking. Miscible displacement experiments were performed on short sand columns (～5 cm) to determine How bacterial deposition on positively charged metal-oxyhydroxide-coated sands is affected by the Presence of previously deposited bacteria.