Real world chlorinated solvents and their interactions with permo-triassic sandstone

摘要

The entry, migration and fate of chlorinated solvents in a fractured/porous media is critically dependent upon fracture aperture/pore size, interfacial tension and wettability. The focus of this work has been to assess changes in the wettability, of two particular sandstone surfaces in the presence of a number of used trichloroethylene samples. In addition the effect of prior exposure to the particular contaminants has been examined. Results suggest that this indeed the case with contact angles varying between 20° and 170° . Additionally in the case of the sandstone cores long-term prior exposure, even to lab grade solvent, can considerably alter the wetting characteristics of this particular medium.