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Sustainability 2016, 8(11), 1086; doi:10.3390/su8111086

Remediation in Situ of Hydrocarbons by Combined Treatment in a Contaminated Alluvial Soil due to an Accidental Spill of LNAPL

1
School of Engineering, University of Basilicata, Viale dell’Ateneo Lucano 10, I-85100 Potenza, Italy
2
Department of Science and High Technology, University of Insubria, Via G.B. Vico 46, I-21100 Varese, Italy
3
Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, I-38123 Trento, Italy
4
Department of Biotechnologies and Life Sciences, University of Insubria, Via G.B. Vico 46, I-21100 Varese, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Marc A. Rosen
Received: 2 May 2016 / Revised: 23 September 2016 / Accepted: 15 October 2016 / Published: 25 October 2016
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Abstract

Soil contamination represents an environmental issue which has become extremely important in the last decades due to the diffusion of industrial activities. Accidents during transport of dangerous materials and fuels may cause severe pollution. The present paper describes the criteria of the actions which were operated to remediate the potential risk and observed negative effects on groundwater and soil originating from an accidental spill of diesel fuel from a tank truck. With the aim to evaluate the quality of the involved environmental matrices in the “emergency” phase, in the following “safety” operation and during the remediation action, a specific survey on hydrocarbons, light and heavy, was carried out in the sand deposits soil. Elaboration of collected data allows us to observe the movement of pollutants in the unsaturated soil. The remediation action was finalized to improve the groundwater and soil quality. The former was treated by a so called “pump and treat” system coupled with air sparging. A train of three different technologies was applied to the unsaturated soil in a sequential process: soil vapour extraction, bioventing and enhanced bioremediation. Results showed that the application of sequential remediation treatments allowed us to obtain a state of quality in unsaturated soil and groundwater as required by Italian law. View Full-Text
Keywords: remediation; soil contamination; groundwater; light non aqueous phase liquids; LNAPL; diesel; accidental spill remediation; soil contamination; groundwater; light non aqueous phase liquids; LNAPL; diesel; accidental spill
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MDPI and ACS Style

Trulli, E.; Morosini, C.; Rada, E.C.; Torretta, V. Remediation in Situ of Hydrocarbons by Combined Treatment in a Contaminated Alluvial Soil due to an Accidental Spill of LNAPL. Sustainability 2016, 8, 1086.

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