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Degradation of naturally produced hydroxylated polybrominated diphenyl ethers in Baltic Sea sediment via reductive debromination
Stockholm University, Faculty of Science, Department of Environmental Science.ORCID iD: 0000-0003-0178-2801
Stockholm University, Faculty of Science, Department of Environmental Science.
2021 (English)In: Environmental Science and Pollution Research, ISSN 0944-1344, E-ISSN 1614-7499, no 28, p. 25878-25885Article in journal (Refereed) Published
Abstract [en]

Over the last two decades, the occurrence of hydroxylated polybrominated diphenyl ethers (OH-PBDEs) has been observed to be nearly ubiquitous among Baltic Sea filamentous macroalgae. High concentrations are continuously recorded among red, green, and brown filamentous algae. Several of these algae species are ephemeral, and when large parts of the colonies decay at the end of their lifecycles, the OH-PBDEs are expected to largely partition to the sediment. In this study, the fate of OH-PBDEs in Baltic Sea sediment was investigated, with focus on the effect of reductive debromination. During chemical debromination, it was observed that the half-life could differ with as much as two orders of magnitude between a pentabrominated and a tetrabrominated congener. Using collected Baltic Sea sediment, it was further observed that the half-life of spiked pentabrominated OH-PBDEs spanned from a few days up to a few weeks in room temperature. At 4 degrees C, it took 6 months to achieve a 50% decrease in concentration of the fasted degrading congener. Clear differences in selectivity between chemical debromination and debromination in sediment were also observed when studying the major reaction products. Baltic Sea sediment seems to have a good capacity for reducing naturally produced OH-PBDEs.

Place, publisher, year, edition, pages
2021. no 28, p. 25878-25885
Keywords [en]
Reduction, OH-PBDE, PBDE, Biodegradation, Algae, Sediment
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-192784DOI: 10.1007/s11356-021-12462-3ISI: 000609398000002PubMedID: 33475918OAI: oai:DiVA.org:su-192784DiVA, id: diva2:1549045
Available from: 2021-05-04 Created: 2021-05-04 Last updated: 2022-02-25Bibliographically approved

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Lindqvist, DennisGustafsson, Johan

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