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Open AccessArticle

Wet Oxidation of Fine Soil Contaminated with Petroleum Hydrocarbons: A Way towards a Remediation Cycle

1
Department of Civil and Architectural Engineering, University of Pavia, via Ferrata 1, 27100 Pavia, Italy
2
Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, via Branze 43, 25123 Brescia, Italy
*
Author to whom correspondence should be addressed.
Environments 2018, 5(6), 69; https://doi.org/10.3390/environments5060069
Received: 16 May 2018 / Revised: 4 June 2018 / Accepted: 6 June 2018 / Published: 8 June 2018
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Abstract

The aim of this experimental study was to assess the feasibility of using a wet oxidation (WO) process for treating fine soil with a high level of total petroleum hydrocarbons (TPHs). Two samples of soil were spiked with two different contaminants (motor oil, and motor oil + diesel). The samples were subjected to a WO bench plant test, where the effect of the main process parameters (i.e., temperature and reaction time) on the removal of TPHs was investigated. Results show that the WO process is effective for the decontamination of hydrocarbons, and a strong reduction (>85%) can be obtained with the typical working conditions of a full-scale plant (temperature = 250 °C, reaction time = 30 min). The solid residue resulting from the WO process was characterized in order to evaluate the recovery options. In terms of chemical characterization, the contents of the pollutants comply with the Italian regulations for commercial and industrial site use. Moreover, the results of the leaching test suggested that these residues could be reused for ceramic and brick manufacturing processes. View Full-Text
Keywords: chemical oxidation; contaminated soil remediation; leaching test; recovery options chemical oxidation; contaminated soil remediation; leaching test; recovery options
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Collivignarelli, M.C.; Vaccari, M.; Abbà, A.; Canato, M.; Sorlini, S. Wet Oxidation of Fine Soil Contaminated with Petroleum Hydrocarbons: A Way towards a Remediation Cycle. Environments 2018, 5, 69.

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