Details zur Publikation

Kategorie Textpublikation
Referenztyp Tagungsbeiträge
Titel (primär) Application of radon gas measurement and electrical imaging techniques in hydrocarbon contaminated areas
Titel (sekundär) ConSoil 2010, 22 - 24 September 2010 Salzburg, Austria ; Proceedings 11th International UFZ-Deltares - TNO Conference on Management of Soil, Groundwater & Sediments. Theme: A: Restoration; ThS_A4: Characterisation: geophysics and nuclear sites
Autor Olivia, A.; Du Puits, M.; Weiß, H. ORCID logo ; Schmidt, A.; Pede, M.A.Z.; Rosa, C.S.; Quintão, S.; Kiang, C.H.
Erscheinungsjahr 2010
Department GWS
Sprache englisch
Keywords Radon; electrical imaging; hydrocarbon; conductive anomalies; contaminated areas
Abstract In order to establish an adequate remediation plan for contaminated soil by Non-Aqueous Phase Liquids (NAPLs) due to petroleum and organic solvents spills, it is fundamental to know the contaminant distribution in subsurface, normally achieved by pertinent chemical analyses in soil samples. However, the number of samples is normally limited, making the accurate delimitation of the contamination plume difficult and costly. In face of that, PETROBRAS, in partnership with LEBAC (UNESP-IGCE, Rio Claro, Sao Paulo, Brazil), UFZ - Zentrum für Umweltforschung (Leipzig, Germany) and GICON - Großmann Ingenieur Consult GmbH (Dresden, Germany) executed field tests to improve investigation of free phase and residual hydrocarbon identification, using electroresistivity methods with 2D and 3D electrical imaging and Radon-222 (Rn) gas levels measurements, in two industrial sites in Sao Paulo, Brazil. NAPLs concentrate available Radon in soil pores thanks to its good solubility, reducing the gas level in the contaminated soil volume. In the studied sites, it was considered that high conductivities mean possibly contaminated portions, assertive confirmed by drillings that found hydrocarbons in those high conductivity portions. In Site 1, the higher levels of Radon-222 gas reached 260 and 281 kBq/m3 values, corresponding to resistivity higher than 80 ohm.m. Low values of Radon (6 and 8 kBq/m3) are coincident to lower or equal to 50 ohm.m resistivity, which match conductive anomalies. Site 2 showed similarbehavior. The tests performed in Sites1 and 2 showed the potential of the Radon method in identification and delimitation of hydrocarbon contaminated sites. The use of this method is recommended, in addition to geophysical surveys and volatile organic compounds in-situ measurements, as the answers of these techniques in presence of hydrocarbons complement each other.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=10369
Olivia, A., Du Puits, M., Weiß, H., Schmidt, A., Pede, M.A.Z., Rosa, C.S., Quintão, S., Kiang, C.H. (2010):
Application of radon gas measurement and electrical imaging techniques in hydrocarbon contaminated areas
ConSoil 2010, 22 - 24 September 2010 Salzburg, Austria ; Proceedings 11th International UFZ-Deltares - TNO Conference on Management of Soil, Groundwater & Sediments. Theme: A: Restoration; ThS_A4: Characterisation: geophysics and nuclear sites
Helmholtz-Zentrum für Umweltforschung - UFZ, Leipzig,