An integrated approach to characterize a polluted site by combining chemical and geophysical methodologies: a case study in Apulia region.

Abstract

In recent years, the identification and monitoring of polluted sites have become very important due tothe widespread of contamination phenomena. The environmental assessment of contaminated sites iscomplex and difficult for the variety of the pollutants and for the physical and chemical heterogeneity ofpolluted sites. Some studies promote an integrated approach, which combines geophysical investigationwith geochemical analysis carried out on subsoil samples to quantitatively estimate the extent and thelevel of the contamination. In this work, a contaminated site located close to Taranto city, in the southof Apulia Region (Italy), has been investigated by chemical and geophysical surveys in order tocharacterize and evaluate the pollution which is occurring since years. Soil chemical analyses of texture,electrical conductivity, pH, organic carbon content, nitrogen, available phosphorous and carbonatecontent have been carried out to characterize soil properties of this site. Analytical investigations ofpollutants have been performed using Gas Chromatography/Mass Spectrometry (GC/MS) andInductively Coupled Plasma Mass Spectrometry (ICP-MS) to identify organic or inorganic compounds,respectively. Geophysical survey has been carried out to assess the geological features of the test siteand support the results of the physical and chemical soil analysis. Particularly, an Electrical ResistivityTomography (ERT) profile has been performed to visualize geo-lithological layers and hydrogeologicalproperties for evaluating the vulnerability of the area. Moreover six high resolution ERT and InducedPolarization (IP) profiles have been conducted close to the soil sampling points to image electricalstructures in the upper part of the soil, severely contaminated by inorganic and organic pollutants.Preliminary results highlight that this integrated approach can efficiently support soil contaminationassessment.


Tutti gli autori

  • V. Ancona; L. De Carlo; M.C. Caputo; V.F. Uricchio; C. Campanale;G. Mascolo

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Anno di pubblicazione

2013

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