Conference proceeding
Degradation of TCE, Cr(VI), NO3-, and SO42- mixtures in columns mimicking bioaugmented Fe-0 barriers
Bioaugmentation, biobarriers, and biogeochemistry : the Sixth International In Situ and On-Site Bioremediation Symposium : San Diego, California, June 4-7, 2001 , Vol.6(8), pp.147-147
01/01/2001
Abstract
Flow-through columns were used to simulate the removal of contaminant mixtures in bioaugmented zero-valent iron barriers. A number of columns were used to examine biotic and abiotic treatment of a mixture containing trichloroethylene (TCE), chromate, nitrate, and sulfate. Extensive degradation of selected contaminants was observed, especially in the Fe super(0) layer. Bioaugmentation had no visible effect on chromate removal, which occurred only in the zone of the biobarrier containing Fe super(0). Bioaugmentation, however, enhanced NO sub(3) super(-) removal, especially when Shewanella algae BRY was added. Sulfate did not react readily with Fe super(0) and was removed only in the column augmented with sulfate reducers. For TCE, most was degraded in the zone containing Fe super(0), and no chlorinated byproducts were detected. Scanning electron microscopic analysis revealed abundant formation of amorphous and crystalline precipitates in Fe super(0) samples in all columns.
Details
- Title: Subtitle
- Degradation of TCE, Cr(VI), NO3-, and SO42- mixtures in columns mimicking bioaugmented Fe-0 barriers
- Creators
- Sumeet GandhiByung-Taek OhJerald L SchnoorPedro JJ Alvarez
- Resource Type
- Conference proceeding
- Publication Details
- Bioaugmentation, biobarriers, and biogeochemistry : the Sixth International In Situ and On-Site Bioremediation Symposium : San Diego, California, June 4-7, 2001 , Vol.6(8), pp.147-147
- Language
- English
- Date published
- 01/01/2001
- Academic Unit
- Civil and Environmental Engineering; Occupational and Environmental Health
- Record Identifier
- 9983997970002771
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