| Title | Impact of the Fenton-like treatment on the microbial community of a diesel-contaminated soil |
| Publication Type | Journal Article |
| Year of Publication | 2018 |
| Authors | Polli F., Zingaretti D., Crognale S., Pesciaroli L., D'Annibale A., Petruccioli M., Baciocchi R. |
| Journal | Chemosphere |
| Volume | 191 |
| Pagination | 580-588 |
| Date Published | Jan |
| Type of Article | Article |
| ISBN Number | 0045-6535 |
| Accession Number | WOS:000418208000067 |
| Keywords | Bioremediation, degradation, DGGE, Diesel contamination, Environmental Sciences & Ecology, Fenton, hydrocarbons, hydrogen-peroxide, petroleum, polluted soil, qPCR, remediation, respiration, SCALE, situ chemical oxidation |
| Abstract | Fenton-like treatment (FLT) is an ISCO technique relying on the iron-induced H2O2 activation in the presence of additives aimed at increasing the oxidant lifetime and maximizing iron solubility under natural soil pH conditions. The efficacy of FLT in the clean-up of hydrocarbon-contaminated soils is well established at the field-scale. However, a better assessment of the impact of the FLT on density, diversity and activity of the indigenous soil microbiota, might provide further insights into an optimal combination between FLT and in-situ bioremediation (ISB). The aim of this work was to assess the impacts of FLT on the microbial community of a diesel-contaminated soil collected nearby a gasoline station. Different FLT conditions were tested by varying either the H2O2 concentrations (2 and 6%) or the oxidant application mode (single or double dosage). The impact of these treatments on the indigenous microbial community was assessed immediately after the Fenton-like treatment and after 30, 60 and 90 d and compared with enhanced natural attenuation (ENA). After FLT, a dramatic decrease in bacterial density, diversity and functionality was evident. Although in microcosms with double dosing at 2% H2O2 a delayed recovery of the indigenous microbiota was observed as compared to those subjected to single oxidant dose, after 60 d incubation the respiration rate increased from 0.036 to 0.256 mu g C-CO2 g(-1). Irrespective of the oxidant dose, best degradation results after 90 d incubation (around 80%) were observed with combined FLT, relying on double oxidant addition, and bioremediation. (C) 2017 Elsevier Ltd. All rights reserved.
|
| Short Title | ChemosphereChemosphere |
| Alternate Journal | Chemosphere |
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Polli, Flavia Zingaretti, Daniela Crognale, Silvia Pesciaroli, Lorena D'Annibale, Alessandro Petruccioli, Maurizio Baciocchi, Renato
D'Annibale, Alessandro/F-7225-2010
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