Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1080/15226514.2010.549860 |
| Title (Primary) | Adaptation of a constructed wetland to simultaneous treatment of monochlorobenzene and perchloroethene |
| Author | Braeckevelt, M.; Seeger, E.M.; Paschke, H.; Kuschk, P.; Kästner, M. |
| Source Titel | International Journal of Phytoremediation |
| Year | 2011 |
| Department | UBT; GWS |
| Volume | 13 |
| Issue | 10 |
| Page From | 998 |
| Page To | 1013 |
| Language | englisch |
| Keywords | Phytoremediation; chlorinated solvents; groundwater-surface water interface; reductive dechlorination; microbial degradation |
| Abstract | Mixed groundwater contaminations by chlorinated volatile organic compounds (VOC) cause environmental hazards if contaminated groundwater discharges into surface waters and river floodplains. Constructed wetlands (CW) or engineered natural wetlands provide a promising technology for the protection of sensitive water bodies. We adapted a constructed wetland able to treat monochlorobenzene (MCB) contaminated groundwater to a mixture of MCB and tetrachloroethene (PCE), representing low and high chlorinated model VOC. Simultaneous treatment of both compounds was efficient after an adaptation time of 2 years. Removal of MCB was temporarily impaired by PCE addition, but after adaptation a MCB concentration decrease of up to 64% (55.3 µmol L-1) was observed. Oxygen availability in the rhizosphere was relatively low, leading to sub-optimal MCB elimination but providing also appropriate conditions for PCE dechlorination. PCE and metabolites concentration patterns indicated a very slow system adaptation. However, under steady state conditions complete removal of PCE inflow concentrations of 10-15 µmol L-1 was achieved with negligible concentrations of chlorinated metabolites in the outflow. Recovery of total dechlorination metabolite loads corresponding to 100%, and ethene loads corresponding to 30% of the PCE inflow load provided evidence for complete reductive dechlorination, corroborated by the detection of Dehalococcoides sp. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=10897 |
| Braeckevelt, M., Seeger, E.M., Paschke, H., Kuschk, P., Kästner, M. (2011): Adaptation of a constructed wetland to simultaneous treatment of monochlorobenzene and perchloroethene Int. J. Phytoremediat. 13 (10), 998 - 1013 10.1080/15226514.2010.549860 |
|