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Laboratory scale simulation of CO2 leakages from marine stable geological storage: metal accumulation and biological effects on the benthic organism Ruditapes philippinarum

Autor Rodríguez-Romero, Araceli ; Blasco, Julián ; Riba, Inmaculada
Fecha de publicación may-2012
Citación 6th SETAC World Congress (2012)
SETAC Europe 22nd Annual Meeting (2012)
ResumenNowadays, the injection and storage of CO2 in marine geological stable formations is proposed as one of the potential strategies to decrease the atmospheric CO2 concentrations in order to avoid the abrupt and irreversible repercussions of climate change. Nevertheless, practical implementation of this technical option could produce significant impacts on marine ecosystems due to possible CO2 leakages that may occur during the injection and sequestration procedure. This study aims to quantify the possible effects of variation in sediment pH derived from CO2 leakages on metal bioaccumulation. To this end, a lab scale experiment involving direct release of CO2 was conducted using the model benthic organism, Ruditapes philippinarum. Bivalves were exposed during 10 days to sediment samples under established pH conditions (8.0-6.0). Survival, burrowing activity and metal accumulation (Fe, Co, Pb, Mn, Al, Zn, Cu, Hg and As) on whole body were employed as endpoint. After 10 days of exposure, 100% mortality was observed at pH 6.0. Non significant differences for mortality rate were found in 7.0 and 6. 5 treatments with regard to the control (7.9). Burrowing activity was affected by pH, decreasing the activity at low pH levels. In general, metal concentrations in clam tissues were affected by pH.
Descripción Trabajo presentado en el 6th SETAC World Congress (2012), celebrado en Berlín del 20 al 24 de mayo de 2012.
URI http://hdl.handle.net/10261/110148
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