COMPETITION FOR H2 BETWEEN SULFATE REDUCTION AND DECHLORINATION IN BUTYRATE-FED ANAEROBIC CULTURES (Articolo in rivista)

Type
Label
  • COMPETITION FOR H2 BETWEEN SULFATE REDUCTION AND DECHLORINATION IN BUTYRATE-FED ANAEROBIC CULTURES (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.procbio.2007.11.006 (literal)
Alternative label
  • AULENTA F. (a); BECCARI M. (a); MAJONE M. (a); PETRANGELI PAPINI M. (a); TANDOI V. (b) (2008)
    COMPETITION FOR H2 BETWEEN SULFATE REDUCTION AND DECHLORINATION IN BUTYRATE-FED ANAEROBIC CULTURES
    in Process biochemistry (1991)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • AULENTA F. (a); BECCARI M. (a); MAJONE M. (a); PETRANGELI PAPINI M. (a); TANDOI V. (b) (literal)
Pagina inizio
  • 161 (literal)
Pagina fine
  • 168 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 43 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 8 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 2 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • a) Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy; b) Water Research Institute, National Research Council (IRSA-CNR), Via Reno 1, 00198 Rome, Italy (literal)
Titolo
  • COMPETITION FOR H2 BETWEEN SULFATE REDUCTION AND DECHLORINATION IN BUTYRATE-FED ANAEROBIC CULTURES (literal)
Abstract
  • In this study two different microbial cultures (one constructed with lagoon sediments from an industrial area in Venice, Italy and the other with aquifer material from a chlorinated solvent-contaminated site in Rho, Italy) were investigated for their ability to dechlorinate perchloroethylene (PCE), 1,1,2,2-tetrachloroethane (TeCA) and their mixtures with butyrate as the primary electron donor (i.e., the H-2-releasing substrate) in the presence and in the absence of sulfate, an ubiquitous groundwater component. In all the tested conditions, the presence of sulfate had a detrimental effect on the rate of reductive dechlorination. This effect was most likely due to the rapid and competitive utilization of H-2 by the sulfate-reducing populations present in the cultures. Indeed, in all sulfate-containing setups a \"steady-state\" dissolved H-2 concentration in the range of 0.7-2.9 nmol L-1 was typically observed during butyrate degradation. At such low H-2 levels the dechlorination process was rate-limited by the electron donor availability. However, in spite of the fact that in all the sulfate-containing setups the H-2 level was nearly the same (i.e., 0.7-2.9 nmol L-1) the extent of reduction of dechlorinating activity greatly depended on the culture tested and the chlorinated compound administrated (from 18% to over 95% reduction of initial dechlorination rate). The results of this study indicate that the extent of competition for H2 between sulfate-reducers and dechlorinators, and in turn the impact of an electron donor addition at a contaminated site, are strongly dependent on the relative kinetics Of H-2-releasing and H-2-consuming reactions and cannot be predicted a priori simply based on differences in H-2 thresholds concentration values among competitive metabolisms. (literal)
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