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IMPACT OF CLAY-DNAPL INTERACTIONS ON TRANSPORT AND STORAGE OF CHLORINATED SOLVENTS IN LOW PERMEABILITY ZONES
Demond, A., M. Goltz, and J. Huang.
SERDP Project ER-1737, 126 pp, 2015
Filed Under: Research
Filed Under: Research
The objective of this research was to examine clay-DNAPL waste interactions as a contributor to the accumulation of chlorinated compound contamination in subsurface clay lenses and layers. Results showed that contact between DNAPL waste and Na-smectitic clay materials caused a contraction of the clay's basal space, producing cracking, in a time frame on the order of weeks. The hypothesized mechanism is syneresis, involving the sorption of the surfactants from the waste onto the clay surface and the solvation of the surfactants' aggregates. Numerical simulations suggest that even a small amount of cracking, and the time-variable dissolution of the DNAPL stored in the cracks into the surrounding clay matrix, extends the remediation time by decades. https://www.serdp-estcp.org/content/download/39943/383468/file/ER-1737%20Final%20Report.V2%20April%202015.pdf
SERDP Project ER-1737, 126 pp, 2015
Filed Under: Research
Filed Under: Research
The objective of this research was to examine clay-DNAPL waste interactions as a contributor to the accumulation of chlorinated compound contamination in subsurface clay lenses and layers. Results showed that contact between DNAPL waste and Na-smectitic clay materials caused a contraction of the clay's basal space, producing cracking, in a time frame on the order of weeks. The hypothesized mechanism is syneresis, involving the sorption of the surfactants from the waste onto the clay surface and the solvation of the surfactants' aggregates. Numerical simulations suggest that even a small amount of cracking, and the time-variable dissolution of the DNAPL stored in the cracks into the surrounding clay matrix, extends the remediation time by decades. https://www.serdp-estcp.org/content/download/39943/383468/file/ER-1737%2
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