Multiple stage cross-current extraction using vegetable oil in the remediation of polycyclic aromatic hydrocarbons-contaminated soil

Ee Von Lau; Suyin Gan; Hoon Kiat Ng

doi:10.30638/eemj.2018.008

Multiple stage cross-current extraction using vegetable oil in the remediation of polycyclic aromatic hydrocarbons-contaminated soil

Ee Von Lau, Suyin Gan, Hoon Kiat Ng

Malaysia Sch of Engineering

Research output: Contribution to journal › Article › Research › peer-review

2 Citations (Scopus)

Abstract

The present study aims to compare the efficiency of a single extraction and a 3-stage cross-current extraction of PAHs from both lowly contaminated (LC) and highly contaminated (HC) sands using palm kernel and soybean oils (PKO, SO). It is observed that 3-stage cross-current extractions increase the total efficiencies compared to single extractions by 18.7-22.7% and 27.2-30.6% for LC and HC sands, respectively. Maximum efficiencies of 94.3% and 98.4% are obtained for phenanthrene (PHEN) and fluoranthene (FLT), respectively using PKO at 70oC in the 3-stage cross-current extraction. In HC soil, these efficiencies reduce by 11.6% and 9.2% for PHEN and FLT, respectively. An oil flotation process as a post treatment step for soil/oil slurry is demonstrated to successfully remove 88.8-90.0 % residue oil from treated sand and 70.5-75.7 % residue oil from treated soil. Finally, a conceptual process of the extraction of PAHs from contaminated soil using vegetable oil is proposed.

Original language	English
Pages (from-to)	63-70
Number of pages	8
Journal	Environmental Engineering and Management Journal
Volume	17
Issue number	1
DOIs	https://doi.org/10.30638/eemj.2018.008
Publication status	Published - Jan 2018

Keywords

Extraction
Polycyclic aromatic hydrocarbons (pahs)
Remediation
Soil
Vegetable oil

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title = "Multiple stage cross-current extraction using vegetable oil in the remediation of polycyclic aromatic hydrocarbons-contaminated soil",

abstract = "The present study aims to compare the efficiency of a single extraction and a 3-stage cross-current extraction of PAHs from both lowly contaminated (LC) and highly contaminated (HC) sands using palm kernel and soybean oils (PKO, SO). It is observed that 3-stage cross-current extractions increase the total efficiencies compared to single extractions by 18.7-22.7% and 27.2-30.6% for LC and HC sands, respectively. Maximum efficiencies of 94.3% and 98.4% are obtained for phenanthrene (PHEN) and fluoranthene (FLT), respectively using PKO at 70oC in the 3-stage cross-current extraction. In HC soil, these efficiencies reduce by 11.6% and 9.2% for PHEN and FLT, respectively. An oil flotation process as a post treatment step for soil/oil slurry is demonstrated to successfully remove 88.8-90.0 % residue oil from treated sand and 70.5-75.7 % residue oil from treated soil. Finally, a conceptual process of the extraction of PAHs from contaminated soil using vegetable oil is proposed.",

keywords = "Extraction, Polycyclic aromatic hydrocarbons (pahs), Remediation, Soil, Vegetable oil",

author = "Lau, {Ee Von} and Suyin Gan and Ng, {Hoon Kiat}",

note = "Funding Information: This study was supported by the Faculty of Engineering, The University of Nottingham Malaysia Campus and by the Research Innovation Services, The University of Nottingham, United Kingdom (Grant No. NRF4318). Publisher Copyright: {\textcopyright} 2018, Gheorghe Asachi Technical University of Iasi, Romania. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2018",

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AU - Ng, Hoon Kiat

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PY - 2018/1

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N2 - The present study aims to compare the efficiency of a single extraction and a 3-stage cross-current extraction of PAHs from both lowly contaminated (LC) and highly contaminated (HC) sands using palm kernel and soybean oils (PKO, SO). It is observed that 3-stage cross-current extractions increase the total efficiencies compared to single extractions by 18.7-22.7% and 27.2-30.6% for LC and HC sands, respectively. Maximum efficiencies of 94.3% and 98.4% are obtained for phenanthrene (PHEN) and fluoranthene (FLT), respectively using PKO at 70oC in the 3-stage cross-current extraction. In HC soil, these efficiencies reduce by 11.6% and 9.2% for PHEN and FLT, respectively. An oil flotation process as a post treatment step for soil/oil slurry is demonstrated to successfully remove 88.8-90.0 % residue oil from treated sand and 70.5-75.7 % residue oil from treated soil. Finally, a conceptual process of the extraction of PAHs from contaminated soil using vegetable oil is proposed.

AB - The present study aims to compare the efficiency of a single extraction and a 3-stage cross-current extraction of PAHs from both lowly contaminated (LC) and highly contaminated (HC) sands using palm kernel and soybean oils (PKO, SO). It is observed that 3-stage cross-current extractions increase the total efficiencies compared to single extractions by 18.7-22.7% and 27.2-30.6% for LC and HC sands, respectively. Maximum efficiencies of 94.3% and 98.4% are obtained for phenanthrene (PHEN) and fluoranthene (FLT), respectively using PKO at 70oC in the 3-stage cross-current extraction. In HC soil, these efficiencies reduce by 11.6% and 9.2% for PHEN and FLT, respectively. An oil flotation process as a post treatment step for soil/oil slurry is demonstrated to successfully remove 88.8-90.0 % residue oil from treated sand and 70.5-75.7 % residue oil from treated soil. Finally, a conceptual process of the extraction of PAHs from contaminated soil using vegetable oil is proposed.

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Multiple stage cross-current extraction using vegetable oil in the remediation of polycyclic aromatic hydrocarbons-contaminated soil

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Keywords

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