| Title: | "Using a multi-method approach based on soil radon deficit, resistivity, and induced polarization measurements to monitor non-aqueous phase liquid contamination in two study areas in Italy and India" |
| Author(s): | Castelluccio M; Agrahari S; De Simone G; Pompilj F; Lucchetti C; Sengupta D; Galli G; Friello P; Curatolo P; Giorgi R; Tuccimei P; |
| Address: | "Dipartimento di Scienze, Universita degli Studi Roma Tre, Largo San Leonardo Murialdo 1, 00146, Rome, Italy. Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur, West Bengal, 721302, India. Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma 1, Via di Vigna Murata 605, 00143, Rome, Italy. Polo Geologico s.r.l., Lungotevere degli Inventori 114 B, 00146, Rome, Italy. Golder Associates, Via Sante Bargellini 4, 00157, Rome, Italy. Dipartimento di Scienze, Universita degli Studi Roma Tre, Largo San Leonardo Murialdo 1, 00146, Rome, Italy. paola.tuccimei@uniroma3.it" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-018-1429-0 |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Linking) |
| Abstract: | "Geochemical and geophysical surveys employing radon deficit, resistivity, and induced polarization (IP) measurements were undertaken on soil contaminated with non-aqueous phase liquids (NAPLs) in two different sites in India and in Italy. Radon deficit, validated through the comparison with average soil radon in reference unpolluted areas, shows the extension of contamination in the upper part of the unsaturated aquifers. In site 1 (Italy), the spill is not recent. A residual film of kerosene covers soil grains, inhibiting their chargeability and reducing electrical resistivity difference with background unpolluted areas. No correlation between the two parameters is observed. Soil volatile organic compounds (VOCs) concentration is not linked with radon deficit, supporting the old age of the spillage. NAPL pollution in sites 2a and 2b (India) is more recent and probably still active, as demonstrated by higher values of electrical resistivity. A good correlation with IP values suggests that NAPL is still distributed as droplets or as a continuous phase in the pores, strengthening the scenario of a fresh spill or leakage. Residual fraction of gasoline in the pore space of sites 2a and 2b is respectively 1.5 and 11.8 kg per cubic meter of terrain. This estimation is referred to the shallower portion of the unsaturated aquifer. Electrical resistivity is still very high indicating that the gasoline has not been strongly degraded yet. Temperature and soil water content influence differently radon deficit in the three areas, reducing soil radon concentration and partly masking the deficit in sites 2a and 2b" |
| Keywords: | "Gasoline/*analysis India Italy Radiation Monitoring/*methods Radon/*analysis Soil Pollutants/analysis Soil Pollutants, Radioactive/*analysis Environmental monitoring NAPL contamination Soil electrical resistivity Soil induced polarization Soil radon;" |
| Notes: | "MedlineCastelluccio, Mauro Agrahari, Sudha De Simone, Gabriele Pompilj, Francesca Lucchetti, Carlo Sengupta, Debashish Galli, Gianfranco Friello, Pierluigi Curatolo, Pierpaolo Giorgi, Riccardo Tuccimei, Paola eng Germany 2018/02/22 Environ Sci Pollut Res Int. 2018 May; 25(13):12515-12527. doi: 10.1007/s11356-018-1429-0. Epub 2018 Feb 20" |
