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Title

Simulation of CO2 leakages from marine stable geological storage:metal mobilization and biota effects

AuthorsRodríguez-Romero, Araceli ; Basallote, M. Dolores; Orte, Manoela R. de; Del Valls, T. A.; Riba, Inmaculada ; Blasco, Julián
Issue DateJul-2013
CitationIX Congreso Ibérico de Contaminación y Toxicología Ambiental (2013)
VI Congreso Iberoamericano de Contaminación y Toxicología Ambiental (2013)
AbstractThe main risk associated to the sequestration and storage of atmospheric CO2 in marine stable geological formations, as mitigation option to reduce climate change effects, is the leakages of retained CO2, which could cause important environmental perturbations on marine ecosystems. This strategy only can be considered feasible if the environmental consequences derived from this technology are considerably lower than that avoided from the increase of CO2 in the atmosphere. In order to assess the potential effects of CO2 leakages from storage systems on metal mobilisation, an experimental device which allows studying the pH effects, in a realistic environmental range 8.0-6.0, was conducted using the model organism Hediste diversicolor. Polychaetes were exposed during 10 days to sediment samples, collected in three different areas and following a metal concentration gradient, under established pH conditions. Survival and metal accumulation (Al, Mn, Zn, Cu, Hg and As) in whole body of H. diversicolor were employed as endpoints. Mortality was significant at low pH levels and it was different depending on sediment characteristics. In general, metal concentrations in worm tissues were influenced by pH in those sediments with highest metal concentration levels. These results suggest that CO2 leakages provoke an indirect increasing of sediment toxicity linked to metal mobilisation
Description9º Congreso Ibérico y 6º Iberoamericano de Contaminación y Toxicología Ambiental, CICTA 2013, a investigación en medio ambiente: imprescindible para la sostenibilidad, 1-4 de julio de 2013, Valencia.
URIhttp://hdl.handle.net/10261/110379
Appears in Collections:(ICMAN) Comunicaciones congresos
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