Bromine species fluxes from Lake Constance's catchment, and a preliminary lake mass balance

Benjamin Gilfedder, Michael Petri, Martin Wessels, Harald Biester

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    Abstract

    Bromine was historically termed a cyclic salt in terrestrial freshwater environments due to its perceived conservative cycling between the oceans and the continents. This basic assumption has been challenged recently, with evidence that bromine is involved in dynamic chemical cycles in soils and freshwaters. We present here a study on dissolved bromine species (bromide, organically bound bromine, DOBr) concentrations and fluxes as well as sediment trap bromine levels and fluxes in Lake Constance, a large lake in southern Germany. Water samples were obtained from all major and some minor inflows and outflows over one year, where-after dissolved bromine species were measured by a combination of ICP-MS and ion chromatography coupled to an ICP-MS (IC-ICP-MS). Sediment traps were deployed at two locations for two years with Br, Ti and Zr levels being measured by mu-XRF
    Original languageEnglish
    Pages (from-to)3385 - 3401
    Number of pages17
    JournalGeochimica et Cosmochimica Acta
    Volume75
    Issue number12
    DOIs
    Publication statusPublished - 2011

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