title: Sea-air exchange of bromoanisoles and methoxylated bromodiphenyl ethers in the Northern Baltic.
abstract: 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.
authors: Department of Chemistry, Umeå University, SE-901 87 Umeå, Sweden. Electronic address: terry.bidleman@umu.se.
authors: Terry F
authors: TF
authors: Bidleman
authors: Department of Chemistry, Umeå University, SE-901 87 Umeå, Sweden.
authors: Kathleen
authors: K
authors: Agosta
authors: Department of Ecology and Environmental Science, Umeå University, SE-901 87 Umeå, Sweden.
authors: Agneta
authors: A
authors: Andersson
authors: Department of Chemistry, Umeå University, SE-901 87 Umeå, Sweden.
authors: Peter
authors: P
authors: Haglund
authors: Department of Chemistry, Umeå University, SE-901 87 Umeå, Sweden.
authors: Per
authors: P
authors: Liljelind
authors: Department of Environmental Science, Royal Roads University, Victoria, BC, V9B 5Y2, Canada.
authors: Alyse
authors: A
authors: Hegmans
authors: Air Quality Processes Research Section, Environment and Climate Change Canada, 6248 Eighth Line, Egbert, ON L0L 1N0, Canada.
authors: Liisa M
authors: LM
authors: Jantunen
authors: Department of Chemistry, Umeå University, SE-901 87 Umeå, Sweden.
authors: Olle
authors: O
authors: Nygren
authors: Department of Chemistry, University of Waterloo, Waterloo, ON N2L 3G1, Canada.
authors: Justen
authors: J
authors: Poole
authors: Department of Chemistry, Umeå University, SE-901 87 Umeå, Sweden.
authors: Matyas
authors: M
authors: Ripszam
authors: Department of Chemistry, Umeå University, SE-901 87 Umeå, Sweden.
authors: Mats
authors: M
authors: Tysklind
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000840:Anisoles / Q000032:analysis*; D001454:Baltic States; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry; D055768:Halogenated Diphenyl Ethers / Q000032:analysis*; D009792:Oceans and Seas; D012621:Seasons; D012623:Seawater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: C496823:2-(2',4'-dibromophenoxy)-3,5-dibromoanisole; C496824:2-(2',4'-dibromophenoxy)-4,6-dibromoanisole; D000393:Air Pollutants; D000840:Anisoles; D055768:Halogenated Diphenyl Ethers; D014874:Water Pollutants, Chemical; C484217:2,4,6-tribromoanisole
keywords: Air-water exchange; Baltic Sea; Bromoanisoles; Halogenated natural products; Methoxylated bromodiphenyl ethers