Solvent extraction of PCB-contaminated soils using the Terra-Kleen system
Removal of polychlorinated biphenyls (PCB) from soils has been difficult to implement on a full-scale, cost-effective basis. The Terra-Kleen solvent extraction system has overcome many of the soil handling, contaminant removal, and regulatory restrictions which have made implementing a cost-effective PCB soil treatment system difficult. The Terra-Kleen system uses a proprietary solvent to extract organic contaminants from soils. This batch process operates at ambient temperatures and employs a solvent regeneration system which concentrates the extracted contaminants and permits reuse of the extraction solvent. Following treatment, the treatment soils are returned to the land, and concentrated contaminant is removed off site for disposal. Terra-Kleen demonstrated the technology during a treatability study in October 1993 and a pilot-scale demonstration in May 1994. In October 1993, PRC obtained 1-ton batches of soil from each of three PCB-contaminated sites and shipped them to Terra-Kleen`s testing facility in Okmulgee, Oklahoma. Two sites were located at Naval Air Station North Island (NASNI) near San Diego, California. The third site was located in Anchorage, Alaska. Analysis of all demonstration soils revealed that Aroclor 1260 was the only PCB mixture present. Successful removal of PCBs below target treatment levels during the treatability study lead to a pilot-scale demonstration in May 1994 at NASNI.
- OSTI ID:
- 69782
- Report Number(s):
- CONF-941189--; ISBN 1-56590-016-2
- Country of Publication:
- United States
- Language:
- English
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