Slow Release of PCB, TNT, and RDX From Soils and Sediments
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB
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One of the contaminantsoil interactions that can profoundly affect contaminant mobility and biodegradation is slow adsorptiondesorption into soil and sediment micropores or the interior of stable aggregates. This process results in contaminants becoming less mobile over the short term, but allows the soil or sediment to serve as a long-term, slow-release source of the contaminant. This phenomenon greatly complicates the prediction of leaching and microbial degradation rates. This study explored the adsorptiondesorption of PCB, TNT, and RDX onto activated carbon and soils over time and the implications for contaminant mobility. Presented herein is an evaluation of the mechanisms, kinetics, and effects of slow adsorptiondesorption on contaminant mobility in soils, sediments, an activated carbon. Algorithms for describing the magnitude and rate of slow adsorptiondesorption have also been evaluated.
- Geology, Geochemistry and Mineralogy
- Solid Wastes and Pollution and Control
- Water Pollution and Control