+ Translate

Dehalogenation of chlorinated dioxins by an anaerobic microbial consortium from sediment

, : Dehalogenation of chlorinated dioxins by an anaerobic microbial consortium from sediment. Environmental Toxicology & Chemistry 14(6): 939-943

Anaerobic microorganisms enriched from Rhine River sediments are able to remove chlorine substituents from polychlorinated dibenzo-p-dioxines (PCDDs). A model PCDD, 1,2,3,4-tetrachlorodibenzo-p-dioxin (1,2,3,4-TeCDD) was reductively dechlorinated to both 1,2,3- and 1,2,4-trichlorodibenzo-p-dioxins (1,2,3- and 1,2,4-TrCDD). These compounds were further dechlorinated to 1,3- and 2,3-dichlorodibenzo-p-dioxins and traces of 2-monochlorodibenzo-p-dioxin. This is the first report in the literature of the anaerobic microbial dechlorination of PCDDs. The same enrichment culture was previously found to dechlorinate chlorinated benzenes (CBs) and polychlorinated biphenyls (PCBs). An anaerobic culture able to remove aryl chlorines from three classes of compounds has not been reported before. The rate at which the culture dechlorinates 1,2,3,4-TeCDD (t-1/2 = 15.5 d) was between those observed for CBs and PCBs. This study shows that reductive dechlorination may have an effect on PCDDs in sediments, as has been demonstrated for CBs and PCBs. The formation of metabolites with a conserved 2,3-substitution pattern from 1,2,3,4-TeCDD indicates that dechlorination of highly chlorinated dibenzo-p-dioxins may result in metabolites that are potentially more toxic than the parent compounds.

Accession: 002590146

DOI: 10.1002/etc.5620140603

Download PDF Full Text: Dehalogenation of chlorinated dioxins by an anaerobic microbial consortium from sediment

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Related references

Drzyzga, O.; E.M.mouni, R.; Agathos, S.N.; Gottschal, J.C., 2002: Dehalogenation of chlorinated ethenes and immobilization of nickel in anaerobic sediment columns under sulfidogenic conditions. A sediment column study was carried out to demonstrate the bioremediation of chloroethene-and nickel-contaminated sediment in a single anaerobic step under sulfate-reducing conditions. Four columns (one untreated control column and three experimen...

Toussaint M.; van der Steen J.M.D.; Slot P.C.; de Wolf J.; Beurskens J.E.M.; Parsons J.R., 1995: Reductive dechlorination of chlorinated dibenzo-p-dioxins by a bacterial consortium isolated from Lake Ketelmeer sediment. Soil and Environment 5: 423-424

Yang, Y.; Pesaro, M.; Sigler, W.; Zeyer, J., 2005: Identification of microorganisms involved in reductive dehalogenation of chlorinated ethenes in an anaerobic microbial community. In this study, we report on phylogenetic and physiological characterization of an anaerobic culture capable of reductive dehalogenation of tetrachloroethene (PCE) obtained from a PCE-contaminated site. The culture was enriched using different comb...

Beurskens, J.E.M.; Dekker, C.G.C.; Heuvel, H. van den; Swart, M.; Wolf, J. de, 1994: Dechlorination of chlorinated benzenes by an anaerobic microbial consortium that selectively mediates the thermodynamic most favourable reactions. Compound selectivity, relative dechlorination rates of different chlorinated benzenes (CBs), and the influence of temp. on the dechlorination rate were studied using an anaerobic microbial consortium from Lake Ketelmeer (Netherlands) sediment wher...

Beurskens, J.E.; Dekker, C.G.; van den Heuvel, H.; Swart, M.; de Wolf, J.; Dolfing, J., 1994: Dechlorination of chlorinated benzenes by an anaerobic microbial consortium that selectively mediates the thermodynamic most favorable reactions. A chlorinated benzene dechlorinating anaerobic microbial consortium was obtained by selective enrichment with hexachlorobenzene (HCB) and lactate from a freshwater sediment sample that originated from an area with proven in situ HCB dechlorination...

Bunge, M.; Lechner, U., 2009: Anaerobic reductive dehalogenation of polychlorinated dioxins. Polychlorinated dibenzo-p-dioxins and -furans (PCDD/Fs) are among the most harmful environmental contaminants. Their widespread distribution due to unintentional or unknown release coincides with environmental persistence, acute and chronic toxici...

Voss J.; Altrogge M.; Wilkes H.; Francke W., 1991: Electroreduction of organic compounds xviii 1 electrochemical dehalogenation of chlorinated dibenzofurans and dibenzo p dioxins in methanol. Zeitschrift fuer Naturforschung Section B Chemical Sciences 46(3): 400-402

O'keefe P.W.; Hilker D.R.; Smith R.M.; Aldous K.M.; Donnelly R.J.; Long D.; Pope D.H., 1986: Nonaccumulation of chlorinated dioxins and chlorinated furans by goldfish carassius auratus exposed to contaminated sediment and fly ash. Bulletin of Environmental Contamination & Toxicology 36(3): 452-459

Pecher, K.; Kusel, K.; Fischer, U.; Herrmann, R., 1995: Reductive dehalogenation of chlorinated hydrocarbons during anaerobic stabilization of municipal wastes. During sequential anaerobic digestion of municipal wastes, distinct biogeochemical phases exist which show different capabilities to transform halogenated hydrocarbons. Chlorophenols, tetrachloroethylene, and chloroanilines codisposed together wit...

Odom J.M.rtin; Nagel Eva; Tabinowski JoAnn, 1995: Chemical-biological catalysis for in situ anaerobic dehalogenation of chlorinated solvents. Bioremediation 3, Vol