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| Titel |
Microzonation O2 and H2S respiration in recent organic matter-rich sediments. Petrola Lake (SE Albacete). |
| VerfasserIn |
Alfonso Menchen, Nicolas Valiente, Juan Jose Gomez-Alday |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250126566
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| Publikation (Nr.) |
 EGU/EGU2016-6306.pdf |
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| Zusammenfassung |
| The sediment-water interface and associated redox processes can play an important role in mitigating the organic and inorganic contaminants. Calibrated microelectrodes with a tip diameter of 100 microns was used for knowing the microzonation, production and consumption rates of O2 and H2S in the water-sediment interface from Petrola hypersaline lake. Oxygen measurements were performed each 25 μm until a maximum depth of 2 mm was reached. Hydrogen sulfide and pH profiles were performed each 100 μm to a maximum depth of 1 cm. Specific 02 and H2S consumption reaction rates were calculated from measured concentration profiles by using a simple one-dimensional diffusion reaction model. Microzonation of O2 and sulfate respiration in recent organic rich sediments suggest distinct reactive zones to take into account when dealing with the attenuation of organic (i.e. pesticides) and inorganic pollutants (nitrate). |
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