Degradation of trichloroethylene (TCE) and polychlorinated biphenyls (PCBs) by Fe and Fe-Pd bimetals in the presence of surfactants and cosolvents
Conference
·
OSTI ID:443132
- Oak Ridge National Lab., TN (United States)
- Oak Ridge Research Inst., TN (United States)
- Wisconsin Univ., Madison, WI (United States)
Surfactants and cosolvents are being used to enhance the removal of dense non-aqueous phase liquids (DNAPL) such as trichloroethylene (TCE) and polychlorinated biphenyls (PCBS) from contaminated soils. However, the waste surfactant solution containing TCE and PCBs must be treated before it can be disposed. This study evaluated the use of zero-valence iron and palladized iron fillings on the dechlorination of TCE and a PCB congener in a dihexylsulfosuccinate surfactant solution. Batch experimental results indicated that TCE can be rapidly degraded by palladized iron filings with a half-life of 27.4 min. PCB was degraded at a slower rate than TCE with a half-life ranging from 100 min to 500 min as the concentration of surfactant increased. In column flow-through experiments, both TCE and PCBs degrade at an enhanced rate with a half-life about 1.5 and 6 min because of an increased solid to solution ratio in the column than in the batch experiments. Results of this work suggest that Fe-Pd filings may be potentially applicable for ex-situ treatment of TCE and PCBs in the surfactant solutions that are generated during surfactant washing of the contaminated soils.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE Office of Environmental Restoration and Waste Management, Washington, DC (United States)
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 443132
- Report Number(s):
- CONF-970208--4; ON: DE97001366
- Country of Publication:
- United States
- Language:
- English
Similar Records
Byproduct formation during the reduction of TCE by zero-valence iron and palladized iron
Investigation of the long-term performance of zero-valent iron for reductive dechlorination of trichloroethylene
Surfactant foam/bioaugmentation technology for in situ treatment of TCE-DNAPLs.
Journal Article
·
Sun Jun 01 00:00:00 EDT 1997
· Ground Water Monitoring and Remediation
·
OSTI ID:479379
Investigation of the long-term performance of zero-valent iron for reductive dechlorination of trichloroethylene
Journal Article
·
Mon Jan 31 23:00:00 EST 2000
· Environmental Science and Technology
·
OSTI ID:20026694
Surfactant foam/bioaugmentation technology for in situ treatment of TCE-DNAPLs.
Journal Article
·
Mon Jun 01 00:00:00 EDT 1998
· Environ. Sci. Technol.
·
OSTI ID:938390