Ozone Injection in Soil Contaminated with Organic Compounds and Ions of Interest Evaluation

Abstract

-In this study, field activities was carried out to collect soil and groundwater samples followed by laboratory work aiming at the hydro geochemical characterization of the unconfined aquifer. Studies led to experimental laboratory activities involving ozone injection through soil columns to detect and quantify the metal ions of interest that are mobilized from the solid matrix. Based on the study of the ion mobilization mechanisms resulting from remediation with ozone, it was possible to determine the ionic concentrations increase in groundwater. Experiment results confirmed that ozone injection in subsurface released pollutant ions such as Al 3+ and Fe 3+affecting drinking water local standards. Other pollutant metallic ions of interest such as Cr 2+, Ni 2+ and Pb 2+ didn't demand ozone and were not mobilized because they were found as part of the crystalline structure, not being adsorbed on the surface of the grain and also not having been detected in the interstitial solution.