Memorias de investigación
Research Publications in journals:
CO2 and Rn degassing from the natural analog of Campo de Calatrava(Spain): Implications for monitoring of CO2 storage sites

Research Areas
  • Earth sciences,
  • Engineering

Natural analogs offer a valuable opportunity to investigate the long-term impacts associated with thepotential leakage in geological storage of CO2. Degassing of CO2and radon isotopes (222Rn - 220Rn) from soil, gas vents and thermal water dischargeswas investigated in the natural analog of Campo de Calatrava Volcanic Field (CCVF; Central Spain) todetermine the CO2-Rn relationships and to assess the role of CO2as carrier gas for radon. Furthermore,radon measurements to discriminate between shallow and deep gas sources were evaluated under theperspective of their applicability in monitoring programs of carbon storage projects. CO2 flux as high as 5000 g m-2d-1 and 222Rn activities up to 430 kBq m-3 were measured; 220Rn activities were one order of magnitude lower than those of 222Rn. The 222Rn/220Rn ratios were used to constrainthe source of the Campo de Calatrava soil gases since a positive correlation between radon isotopic ratiosand CO2 fluxes was observed. Thus, in agreement with previous studies, our results indicate a deep mantle-related origin of CO2 for both free and soil gases, suggesting that carbon dioxide is an efficientcarrier for Rn. Furthermore, it was ascertained that the increase of 222Rn in the soil gases was likely produced by two main processes: (i) direct transport by a carrier gas, i.e., CO2 and (ii) generation at shallowlevel due to the presence of relatively high concentrations of dissolved U and Ra in the thermal aquiferof Campo de Calatrava. The diffuse CO2 soil flux and radon isotopic surveys carried out in the Campo de Calatrava Volcanic Fields can also be applicable to geochemical monitoring programs in CCS (Carbon Capture and Storage) areas as these parameters are useful to: (i) constrain CO2leakages once detected and (ii) monitor both theevolution of the leakages and the effectiveness of subsequent remediation activities. These measurementscan also conveniently be used to detect diffuse leakages.
International Journal of Greenhouse Gas Control
Impact factor JCR
Impact info
Datos JCR del año 2012
Journal number
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  • Autor: Javier de Elio Medina UPM
  • Autor: Marcelo Fabian Ortega Romero UPM
  • Autor: Barbara Nisi CNR-IGG Institute of Geosciences and Earth Resources, Pisa, Italy
  • Autor: Luis Felipe Mazadiego Martinez UPM
  • Autor: Orlando Vaselli Department of Earth Sciences, Florence, Italy
  • Autor: Juan Caballero UPM
  • Autor: Fidel Grandia AMPHOS21

Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Estudios Ambientales
  • Departamento: Energía y Combustibles