Análisis y modelado del comportamiento de lixiviación de metales de sedimentos contaminados en contacto con fugas de CO2 procedentes de sistemas de captura y almacenamiento de carbono (CAC)

Zusammenfassung

Carbon Capture Storage (CCS) is currently among techniques intensely studies by the international research community for their potential to reduce greenhouse gases. the consequences of potential CO2 leakages from CCS sites into surface sediment and into deep sea are then necessary to be evaluated. Trace metals and organic contaminants would be release from contaminated sediment due to the seawater acidification. the general objective of this thesis is to generate new knowledge about the potential effects of CO2 leakages on contaminated marine sediment in CCs systems by means of the analysis, modeling and assessment of the mobility of metals and Dissolved Organic Carbon (DOC). The environmental and physico-chemical characterization of the sediment and the global parameter behavior (pH, conductivity and DOC) of the leaching tests are studied. The assessment and modeling of metal release under different scenarios of acidification using leaching tests is also addressed. The thesis results are useful to evaluate the sustainability of the CCS technology in different acidification scenarios of the marine environment.