Effect of thin layer caps on cesium contaminated bed sediment remediation
- Dillard Univ., New Orleans, LA (United States)
An alternative to conventional in-situ capping of contaminated bed-sediment is being investigated. The method proposed entails periodically distributing (at 3-month intervals) a thin layer (about 1 cm. in thickness) of silt particles onto the contaminated bed. Lake Swaytoe in Russia, contaminated with Cesium 137, is used for the case study on theoretical model calculations. Due to Cs-137 adsorption on the silt the cap acts as a barrier, reducing the concentration in the porewater, burial of contaminated solids also occurs with subsequent application of layers. Over time, bioturbation enhanced particle transport mixes clean sediment with contaminated sediment thereby reducing the effectiveness of the cap. Particle interchange is modeled over time to predict concentration levels and to adjust the appropriate time interval for putting on a new layer. The results indicate Bed surface porewater Cs-137 concentration can be reduced by over 85% in the first year after four applications of thin layers.
- OSTI ID:
- 370238
- Report Number(s):
- CONF-960376-; TRN: 96:003805-0289
- Resource Relation:
- Conference: Spring national meeting of the American Chemical Society (ACS), New Orleans, LA (United States), 24-28 Mar 1996; Other Information: PBD: 1996; Related Information: Is Part Of 211th ACS national meeting; PB: 2284 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Physical verification of contaminated sediment remediation: Capping, confined aquatic disposal, and enhanced natural recovery
Effect of bioturbation on contaminated sediment deposited over remediated sediment