Journal
GEOCHIMICA ET COSMOCHIMICA ACTA
Volume 142, Issue -, Pages 334-348Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.gca.2014.07.032
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Funding
- National Science Foundation [OCE-1131109, OCE 1155385, MCB-0919682]
- Division Of Ocean Sciences
- Directorate For Geosciences [1155385] Funding Source: National Science Foundation
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Elemental sulfur is an important intermediate of sulfide oxidation and may be produced via abiotic and biotic pathways. In this study the concentration and size fractionation of elemental sulfur were measured in two different sulfidic marine environments: the Chesapeake Bay and buoyant hydrothermal vent plumes along the Mid-Atlantic Ridge. Nanoparticulate sulfur (<0.2 mu m) was found to comprise up to 90% of the total elemental sulfur in anoxic deep waters of the Chesapeake Bay. These data were compared with previous studies of elemental sulfur, and represent one of the few reports of nanoparticulate elemental sulfur in the environment. Additionally, a strain of phototrophic sulfide oxidizing bacteria isolated from the Chesapeake Bay was shown to produce elemental sulfur as a product of sulfide oxidation. Elemental sulfur concentrations are also presented from buoyant hydrothermal vent plumes located along the Mid-Atlantic Ridge. In the Mid-Atlantic Ridge plume, S-0 concentrations up to 33 mu M were measured in the first meter of rising plumes at three different vent sites, and nanoparticulate S-0 was up to 44% of total elemental sulfur present. (C) 2014 Elsevier Ltd. All rights reserved.
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