Publication Details |
| Reference Category | Journals |
| DOI / URL | link |
| Title (Primary) | Bioremediation process for sediments contaminated by heavy metals: feasibility study on a pilot scale |
| Author | Seidel, H.; Löser, C.; Zehnsdorf, A.; Hoffmann, P.; Schmerold, R.; |
| Journal | Environmental Science & Technology |
| Year | 2004 |
| Department | UBT; UBZ; |
| Volume | 38 |
| Issue | 5 |
| Language | englisch; |
| Abstract | The core stages of a sediment remediation process the conditioning of dredged sludge by plants and the solid-bed leaching of heavy metals using microbially produced sulfuric acidwere tested on a pilot scale using a highly polluted river sediment. Conditioning was performed in 50 m3 basins at sludge depths of 1.8 m. During one vegetation period the anoxic sludge turned into a soil-like oxic material and became very permeable to water. Reed canary grass (Phalaris arundinacea) was found to be best suited for conditioning. Bioleaching was carried out in an aerated solid-bed reactor of 2000 L working volume using oxic soil-like sediment supplemented with 2% sulfur. When applying conditioned sediment, the oxidation of easily degradable organic matter by heterotrophic microbes increased the temperature up to 50°C in the early leaching phase, which in turn temporarily inhibited the sulfur-oxidizing bacteria. Nevertheless, most of the metal contaminants were leached within 21 days. Zn, Cd, Mn, Co, and Ni were removed by 61−81%, Cu was reduced by 21%, while Cr and Pb were nearly immobile. A cost-effectiveness assessment of the remediation process indicates it to be a suitable treatment for restoring polluted sediments for beneficial use. |
| ID | 4546 |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=4546 |
| Seidel, H., Löser, C., Zehnsdorf, A., Hoffmann, P., Schmerold, R. (2004): Bioremediation process for sediments contaminated by heavy metals: feasibility study on a pilot scale Environ. Sci. Technol. 38 (5), 1582 - 1588 |
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