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Sea-air exchange of bromoanisoles and methoxylated bromodiphenylethers in the Northern Baltic
Umeå University, Faculty of Science and Technology, Department of Chemistry. (Arcum ; EcoChange)
Umeå University, Faculty of Science and Technology, Department of Chemistry.
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. (Arcum)
Umeå University, Faculty of Science and Technology, Department of Chemistry.
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2016 (English)In: Marine Pollution Bulletin, ISSN 0025-326X, E-ISSN 1879-3363, Vol. 112, no 1-2, 58-64 p.Article in journal (Refereed) Published
Abstract [en]

Halogenated natural products in biota of the Baltic Sea include bromoanisoles (BAs) and methoxylated bromodiphenyl ethers (MeO-BDEs). We identified biogenic 6-MeO-BDE47 and 2'-MeO-BDE68 in Baltic water and air for the first time using gas chromatography - high resolution mass spectrometry. Partial pressures in air were related to temperature by: log p/Pa=m/T(K)+b. We determined Henry's law constants (HLCs) of 2,4-dibromoanisole (2,4-DiBA) and 2,4,6-tribromoanisole (2,4,6-TriBA) from 5 to 30°C and revised our assessment of gas exchange in the northern Baltic. The new water/air fugacity ratios (FRs) were lower, but still indicated net volatilization in May-June for 2,4-DiBA and May - September for 2,4,6-TriBA. The net flux (negative) of BAs from Bothnian Bay (38,000km2) between May - September was revised from -1319 to -532kg. FRs of MeO-BDEs were >1, suggesting volatilization, although this is tentative due to uncertainties in their HLCs and binding to dissolved organic carbon.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 112, no 1-2, 58-64 p.
Keyword [en]
Air-water exchange, Baltic Sea, Bromoanisoles, Halogenated natural products, Methoxylated bromodiphenyl ethers
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:umu:diva-126879DOI: 10.1016/j.marpolbul.2016.08.042ISI: 000386188900017PubMedID: 27575397OAI: oai:DiVA.org:umu-126879DiVA: diva2:1038546
Available from: 2016-10-19 Created: 2016-10-19 Last updated: 2017-08-31Bibliographically approved

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Bidleman, Terry F.Agosta, KathleenAndersson, AgnetaHaglund, PeterLiljelind, PerNygren, OlleRipszam, MatyasTysklind, Mats
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Department of ChemistryDepartment of Ecology and Environmental Sciences
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