The interaction between biogeochemical, hydrological, and natural attenuation processes on the degradation of chlorinated aliphatic hydrocarbons (CAH) in tidal discharge wetland sediments was studied through modeling. A one-dimensional non-steady state implicit finite difference model was developed to simulate the reactive transport of redox species and CAH compounds. Highly chlorinated CAH (PCE, trichloroethylene) reduced to daughter compounds (dichloroethylene, vinyl chloride) at a faster rate in highly reducing environments (sulfate-reducing and methanogenic) than in aerobic conditions. Increased dilution and dispersion of porewaters caused by tidal forces and aerobic oxidation of daughter compounds in the rhizosphere would have an effect on the potential for breakthrough of these compounds to the surface. This is an abstract of a paper presented at the 228th ACS National Meeting (Philadelphia, PA 8/22-26/2004).
|Original language||English (US)|
|Number of pages||1|
|Journal||ACS, Division of Environmental Chemistry - Preprints of Extended Abstracts|
|State||Published - Dec 1 2004|
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