| Title | Predominance of Dehalococcoides in the presence of different sulfate concentrations |
| Abstract | This is the first study that investigates in detail the effect of different sulfate concentrations on trichloroethene-dechlorinating microbial communities, both in terms of dechlorinating performance andmicrobial composition. The study used a series of Dehalococcoidescontaining trichloroethene-dechlorinating microbial communities, which operated for more than 800 days in the presence of different sulfate concentrations and limitingelectron donor conditions. This study proves the ability of Dehalococcoides spp., the only genus able to completely dechlorinate trichloroethene, to predominate in mixed anaerobic microbial communities regardless of the magnitude of sulfate concentration, even under limitingelectron donor conditions. Although other microorganisms, such as the Sulfurospirillum spp. bacteria and members of the sulfate-reducing bacteria group were able to thrive, they were not able to predominate in such a competitive environment. However, this picture was not reflected in reductive dechlorination, which demonstrated a much better performance under methanogenic conditions or in the presence of low sulfate concentration (30 mg/l) than in the presence of higher sulfate concentrations (>400 mg/l). Therefore, different species of Dehalococcoides or other dechlorinating bacteria, which are not able to thrive in the presence of high sulfate concentrations (>400 mg/l), are possibly responsible for the higher dechlorination efficiency that was observed under methanogenic conditions. © Springer Science+Business Media Dordrecht 2013. |
| Source | Water, air and soil pollution (Dordr., Online) 225 (1), pp. 1785–1799 |
| Keywords | DehalococcoidesFISHReductive dechlorinationSulfate reductionTrichloroethene |
| Journal | Water, air and soil pollution (Dordr., Online) |
| Editor | Kluwer, Dordrecht, Paesi Bassi |
| Year | 2014 |
| Type | Articolo in rivista |
| DOI | 10.1007/s11270-013-1785-9 |
| Authors | Panagiotakis I.; Mamais D.; Pantazidou M.; Rossetti S.; Aulenta F.; Tandoi V. |
| Text | 300082 2014 10.1007/s11270 013 1785 9 Scopus 2 s2.0 84888802029 Dehalococcoides FISH Reductive dechlorination Sulfate reduction Trichloroethene Predominance of Dehalococcoides in the presence of different sulfate concentrations Panagiotakis I.; Mamais D.; Pantazidou M.; Rossetti S.; Aulenta F.; Tandoi V. School of Civil Engineering, National Technical University of Athens, Zografou 15780, Greece; Water Research Institute, National Research Council IRSA CNR , Via Salaria km 29,300 C.P., Rome, Italy This is the first study that investigates in detail the effect of different sulfate concentrations on trichloroethene dechlorinating microbial communities, both in terms of dechlorinating performance andmicrobial composition. The study used a series of Dehalococcoidescontaining trichloroethene dechlorinating microbial communities, which operated for more than 800 days in the presence of different sulfate concentrations and limitingelectron donor conditions. This study proves the ability of Dehalococcoides spp., the only genus able to completely dechlorinate trichloroethene, to predominate in mixed anaerobic microbial communities regardless of the magnitude of sulfate concentration, even under limitingelectron donor conditions. Although other microorganisms, such as the Sulfurospirillum spp. bacteria and members of the sulfate reducing bacteria group were able to thrive, they were not able to predominate in such a competitive environment. However, this picture was not reflected in reductive dechlorination, which demonstrated a much better performance under methanogenic conditions or in the presence of low sulfate concentration 30 mg/l than in the presence of higher sulfate concentrations >400 mg/l . Therefore, different species of Dehalococcoides or other dechlorinating bacteria, which are not able to thrive in the presence of high sulfate concentrations >400 mg/l , are possibly responsible for the higher dechlorination efficiency that was observed under methanogenic conditions. © Springer Science Business Media Dordrecht 2013. 225 http //www.scopus.com/inward/record.url eid=2 s2.0 84888802029 partnerID=q2rCbXpz Articolo in rivista Kluwer 1573 2932 Water, air and soil pollution Dordr., Online Water, air and soil pollution Dordr., Online Water air soil pollut. Dordr., Online Water, air and soil pollution. Dordr., Online Water, air soil pollution Dordr., Online simona.rossetti ROSSETTI SIMONA federico.aulenta AULENTA FEDERICO valter.tandoi TANDOI VALTER |
