Mixed region reactors for in situ treatment of DNAPL contaminated low permeability media
- Oak Ridge National Lab., TN (United States)
Fine-textured soils and sediments contaminated by dense non-aqueous phase liquids (DNAPLs) present a significant environmental restoration challenge. An emerging approach to rapid in situ treatment within low permeability media involves the use of soil mixing to create mixed region reactors wherein biological or physical/chemical treatment processes can be employed. In cohesive soils, mixing breaks up the original soil structure and produces soil aggregates or clods separated by interaggregate void spaces. These void spaces create preferential flow paths for more efficient extraction of contaminants from the soil matrix or more rapid diffusion of treatment agents into the soil aggregates. This enhancement technology has been most successfully used with vapor stripping. However, other technologies can also be coupled with soil mixing including chemical degradation, biodegradation and solidification. The application of this technology to DNAPL-contaminated low permeability media appears promising but requires further experiments and models that can simulate the movement of DNAPLs in mixed regions. 11 refs., 6 figs.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- OSTI ID:
- 447175
- Report Number(s):
- ORNL/TM-13305; ON: DE97050722; TRN: 97:001173-0016
- Resource Relation:
- Other Information: PBD: Aug 1996; Related Information: Is Part Of In situ remediation of DNAPL compounds in low permeability media fate/transport, in situ control technologies, and risk reduction; PB: 318 p.
- Country of Publication:
- United States
- Language:
- English
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