Adaptation of a constructed wetland to simultaneous treatment of monochlorobenzene and perchloroethene

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung


  • M. Braeckevelt - , Professur für Siedlungswasserwirtschaft, Helmholtz-Zentrum für Umweltforschung (UFZ) (Autor:in)
  • E. M. Seeger - , Helmholtz-Zentrum für Umweltforschung (UFZ) (Autor:in)
  • H. Paschke - , Helmholtz-Zentrum für Umweltforschung (UFZ) (Autor:in)
  • P. Kuschk - , Helmholtz-Zentrum für Umweltforschung (UFZ) (Autor:in)
  • M. Kaestner - , Helmholtz-Zentrum für Umweltforschung (UFZ) (Autor:in)


Mixed groundwater contaminations by chlorinated volatile organic compounds (VOC) cause environmental hazards if contaminated groundwater discharges into surfacewaters 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 1/2 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.


Seiten (von - bis)998-1013
FachzeitschriftInternational journal of phytoremediation
PublikationsstatusVeröffentlicht - Nov. 2011

Externe IDs

PubMed 21972567
ORCID /0009-0001-5656-0053/work/145224073



  • Chlorinated solvents, Groundwater-surface water interface, Microbial degradation, Phytoremediation, Reductive dechlorination