Electrokinetic remediation of petroleum hydrocarbon contaminated soil (I)

Saini, Anish and Bekele, Dawit Nega and Chadalavada, Sreenivasulu ORCID: https://orcid.org/0000-0002-5000-8313 and Fang, Cheng and Naidu, Ravi (2021) Electrokinetic remediation of petroleum hydrocarbon contaminated soil (I). Environmental Technology and Innovation, 23:101585. pp. 1-9.

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Abstract

The remediation of petroleum hydrocarbons (TPH) in a contaminated soil by electrokinetic (EK) treatment was studied in the laboratory. The effects of applying a constant electrical current on soil pH, moisture content, electrical conductivity (EC), temperature, and the concentrations of three fractions of TPH (C10–C16, C17–C34 and C35–C40) were investigated. The experiment was run for seven days and soil samples were collected at the end of the 7 day period for analysis of soil pH and TPH concentration. There were extreme pH conditions near the electrodes. At the end of the experiment there was around a 37% reduction of C10–C16 chain compounds compared to the initial concentration of 164 ± 18 mg/kg. The study investigated TPH remediation to a depth of 24 cm, which is significantly more than most studies of EK remediation of TPH-contaminated soils. We observed reductions in TPH concentrations even at a depth of 24 cm. The spatial distribution of reductions in TPH concentrations was also studied and it was observed that more remediation occurred near the cathodes than near the anodes. Further, the greatest reductions in TPH concentrations were recorded near the electrodes in the lowest and middle parts of the experimental set-up. The application of electrokinetics to remediate TPH-contaminated soils could be a viable option as an in situ remediation technology.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 15 Feb 2022 04:08
Last Modified: 19 Jul 2022 00:50
Uncontrolled Keywords: Electrokinetic (EK) remediation; In-situ remediation; Petroleum hydrocarbons (TPH); Spatial distribution of TPH reduction
Fields of Research (2008): 05 Environmental Sciences > 0502 Environmental Science and Management > 050205 Environmental Management
Fields of Research (2020): 41 ENVIRONMENTAL SCIENCES > 4104 Environmental management > 410404 Environmental management
41 ENVIRONMENTAL SCIENCES > 4104 Environmental management > 410402 Environmental assessment and monitoring
Identification Number or DOI: https://doi.org/10.1016/j.eti.2021.101585
URI: http://eprints.usq.edu.au/id/eprint/46140

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