title: Dissolution of a multicomponent DNAPL pool in an experimental aquifer.
abstract: This paper presents the results from a well-defined, circular-shaped, multicomponent dense nonaqueous phase liquid (DNAPL) pool dissolution experiment conducted in a three-dimensional, bench scale model aquifer. The multicomponent pool is a mixture of tetrachloroethylene (PCE) and 1,1,2-trichloroethane (1,1,2-TCA); PCE was the major component and 1,1,2-TCA was the minor component. Downgradient plume concentrations were measured at five specific locations over time until the majority of the 1,1,2-TCA was depleted from the DNAPL pool source. The experimental results suggest distinct spatial-temporal plume patterns for minor DNAPL components versus major DNAPL components. The downgradient concentration varied over time for 1,1,2-TCA while a stable plume developed for PCE. A semi-analytical solution for contaminant transport resulting from dissolution of multicomponent nonaqueous phase liquid pools successfully simulated the plume structure and dynamics for both the major and minor DNAPL components.
authors.affiliation: Department of Civil and Environmental Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA. kenlee@rci.rutgers.edu
authors.forename: Kenneth Y
authors.initials: KY
authors.lastname: Lee
authors.forename: Constantinos V
authors.initials: CV
authors.lastname: Chrysikopoulos
mesh_terms: D005618:Fresh Water / Q000737:chemistry*; D008956:Models, Chemical; D009994:Osmolar Concentration; D044367:Phase Transition; D013750:Tetrachloroethylene / Q000302:isolation & purification*; D014240:Trichloroethanes / Q000302:isolation & purification*
chemical_list: D014240:Trichloroethanes; C024567:1,1,2-trichloroethane; D013750:Tetrachloroethylene