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Anaerobic reductive dechlorination of 1,2,3,4-tetrachlorodibenzofuran in polychlorinated dibenzo-p-dioxin- and dibenzofuran-contaminated sediments of the Kymijoki River, Finland.
Chemosphere. 2014 Mar; 98:58-65.C

Abstract

Sediments of the Kymijoki River are highly contaminated with polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). These persistent PCDD/Fs resist biotic degradation and therefore the potential for microbial reductive dechlorination was assessed to determine how microbes impact the fate of these compounds. Anaerobic sediment microcosms of five different sites in the river were spiked with 1,2,3,4-tetrachlorodibenzofuran (1,2,3,4-TeCDF) as a model compound to determine the dechlorination potential in the sediments. Dechlorinating bacteria were active in all the study sites of the river. The extent of dechlorination over 10 and 29 months corresponded to the levels of aged PCDD/Fs, with sediments of the most contaminated site at Kuusankoski being the most active for reductive dechlorination. The dechlorination activity and levels of aged PCDD/Fs were correlated within the sediment cores at the all sites. The pathway of 1,2,3,4-TeCDF dechlorination was mainly via 1,3,4-trichlorodibenzofuran (TrCDF) to 1,3-dichlorodibenzofuran (DiCDF). Dechlorination via 1,2,4-TrCDF to further dechlorination products was also detected. Lateral reductive dechlorination would decrease the toxicity of 2,3,7,8-substituted PCDD/Fs. Our data suggest that sediments of the Kymijoki River contain indigenous microorganisms that are responsible for dechlorination of PCDD/Fs, especially at the most contaminated site.

Authors+Show Affiliations

University of Helsinki, Dept. of Environmental Sciences, Lahti, Finland. Electronic address: sanna.kuokka@helsinki.fi.University of Helsinki, Dept. of Environmental Sciences, Lahti, Finland.University of Helsinki, Dept. of Environmental Sciences, Lahti, Finland; Rutgers University, Dept. of Biochemistry and Microbiology, New Brunswick, NJ, USA.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24210554

Citation

Kuokka, S, et al. "Anaerobic Reductive Dechlorination of 1,2,3,4-tetrachlorodibenzofuran in Polychlorinated Dibenzo-p-dioxin- and Dibenzofuran-contaminated Sediments of the Kymijoki River, Finland." Chemosphere, vol. 98, 2014, pp. 58-65.
Kuokka S, Rantalainen AL, Häggblom MM. Anaerobic reductive dechlorination of 1,2,3,4-tetrachlorodibenzofuran in polychlorinated dibenzo-p-dioxin- and dibenzofuran-contaminated sediments of the Kymijoki River, Finland. Chemosphere. 2014;98:58-65.
Kuokka, S., Rantalainen, A. L., & Häggblom, M. M. (2014). Anaerobic reductive dechlorination of 1,2,3,4-tetrachlorodibenzofuran in polychlorinated dibenzo-p-dioxin- and dibenzofuran-contaminated sediments of the Kymijoki River, Finland. Chemosphere, 98, 58-65. https://doi.org/10.1016/j.chemosphere.2013.10.002
Kuokka S, Rantalainen AL, Häggblom MM. Anaerobic Reductive Dechlorination of 1,2,3,4-tetrachlorodibenzofuran in Polychlorinated Dibenzo-p-dioxin- and Dibenzofuran-contaminated Sediments of the Kymijoki River, Finland. Chemosphere. 2014;98:58-65. PubMed PMID: 24210554.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Anaerobic reductive dechlorination of 1,2,3,4-tetrachlorodibenzofuran in polychlorinated dibenzo-p-dioxin- and dibenzofuran-contaminated sediments of the Kymijoki River, Finland. AU - Kuokka,S, AU - Rantalainen,A-L, AU - Häggblom,M M, Y1 - 2013/11/08/ PY - 2013/02/15/received PY - 2013/09/23/revised PY - 2013/10/01/accepted PY - 2013/11/12/entrez PY - 2013/11/12/pubmed PY - 2014/11/2/medline KW - Dehalogenation KW - PCDD/F KW - Reductive dechlorination KW - Sediment SP - 58 EP - 65 JF - Chemosphere JO - Chemosphere VL - 98 N2 - Sediments of the Kymijoki River are highly contaminated with polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). These persistent PCDD/Fs resist biotic degradation and therefore the potential for microbial reductive dechlorination was assessed to determine how microbes impact the fate of these compounds. Anaerobic sediment microcosms of five different sites in the river were spiked with 1,2,3,4-tetrachlorodibenzofuran (1,2,3,4-TeCDF) as a model compound to determine the dechlorination potential in the sediments. Dechlorinating bacteria were active in all the study sites of the river. The extent of dechlorination over 10 and 29 months corresponded to the levels of aged PCDD/Fs, with sediments of the most contaminated site at Kuusankoski being the most active for reductive dechlorination. The dechlorination activity and levels of aged PCDD/Fs were correlated within the sediment cores at the all sites. The pathway of 1,2,3,4-TeCDF dechlorination was mainly via 1,3,4-trichlorodibenzofuran (TrCDF) to 1,3-dichlorodibenzofuran (DiCDF). Dechlorination via 1,2,4-TrCDF to further dechlorination products was also detected. Lateral reductive dechlorination would decrease the toxicity of 2,3,7,8-substituted PCDD/Fs. Our data suggest that sediments of the Kymijoki River contain indigenous microorganisms that are responsible for dechlorination of PCDD/Fs, especially at the most contaminated site. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/24210554/Anaerobic_reductive_dechlorination_of_1234_tetrachlorodibenzofuran_in_polychlorinated_dibenzo_p_dioxin__and_dibenzofuran_contaminated_sediments_of_the_Kymijoki_River_Finland_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(13)01372-6 DB - PRIME DP - Unbound Medicine ER -