Sequential extraction of polycyclic aromatic hydrocarbons using subcritical water

Agnieszka E. Latawiec; Brian J. Reid

doi:10.1016/j.chemosphere.2009.11.029

Sequential extraction of polycyclic aromatic hydrocarbons using subcritical water

Agnieszka E. Latawiec, Brian J. Reid

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Abstract

A rapid sequential subcritical (superheated) water extraction method for polycyclic aromatic hydrocarbons (PAHs) in contaminated soil and sediment is presented. Decreasing the polarity of water by successive increase of the extraction temperature from 50 °C to 200 °C at the moderate pressure (10.3 MPa) enabled selective, non-exhaustive extractions to be performed. Concurrent with increasing temperatures to 150 °C there was an increase in PAH extraction efficiencies. For the majority of determinations no significant differences between extractions at 150 °C and 200 °C were observed. Varied extraction efficiencies of PAHs at the same extraction conditions reflected dissimilarities between environmental matrices investigated. Selective subcritical water extraction of PAHs was proportional to their octanol-water partition coefficients. This technique may be applicable in evaluation of risks associated with PAH contaminated sites and in assessments of their bioremediation potential.

Original language	English
Pages (from-to)	1042-1048
Number of pages	7
Journal	Chemosphere
Volume	78
Issue number	8
DOIs	https://doi.org/10.1016/j.chemosphere.2009.11.029
Publication status	Published - 2010

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10.1016/j.chemosphere.2009.11.029

Cite this

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title = "Sequential extraction of polycyclic aromatic hydrocarbons using subcritical water",

abstract = "A rapid sequential subcritical (superheated) water extraction method for polycyclic aromatic hydrocarbons (PAHs) in contaminated soil and sediment is presented. Decreasing the polarity of water by successive increase of the extraction temperature from 50 °C to 200 °C at the moderate pressure (10.3 MPa) enabled selective, non-exhaustive extractions to be performed. Concurrent with increasing temperatures to 150 °C there was an increase in PAH extraction efficiencies. For the majority of determinations no significant differences between extractions at 150 °C and 200 °C were observed. Varied extraction efficiencies of PAHs at the same extraction conditions reflected dissimilarities between environmental matrices investigated. Selective subcritical water extraction of PAHs was proportional to their octanol-water partition coefficients. This technique may be applicable in evaluation of risks associated with PAH contaminated sites and in assessments of their bioremediation potential.",

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journal = "Chemosphere",

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T1 - Sequential extraction of polycyclic aromatic hydrocarbons using subcritical water

AU - Latawiec, Agnieszka E.

AU - Reid, Brian J.

PY - 2010

Y1 - 2010

N2 - A rapid sequential subcritical (superheated) water extraction method for polycyclic aromatic hydrocarbons (PAHs) in contaminated soil and sediment is presented. Decreasing the polarity of water by successive increase of the extraction temperature from 50 °C to 200 °C at the moderate pressure (10.3 MPa) enabled selective, non-exhaustive extractions to be performed. Concurrent with increasing temperatures to 150 °C there was an increase in PAH extraction efficiencies. For the majority of determinations no significant differences between extractions at 150 °C and 200 °C were observed. Varied extraction efficiencies of PAHs at the same extraction conditions reflected dissimilarities between environmental matrices investigated. Selective subcritical water extraction of PAHs was proportional to their octanol-water partition coefficients. This technique may be applicable in evaluation of risks associated with PAH contaminated sites and in assessments of their bioremediation potential.

AB - A rapid sequential subcritical (superheated) water extraction method for polycyclic aromatic hydrocarbons (PAHs) in contaminated soil and sediment is presented. Decreasing the polarity of water by successive increase of the extraction temperature from 50 °C to 200 °C at the moderate pressure (10.3 MPa) enabled selective, non-exhaustive extractions to be performed. Concurrent with increasing temperatures to 150 °C there was an increase in PAH extraction efficiencies. For the majority of determinations no significant differences between extractions at 150 °C and 200 °C were observed. Varied extraction efficiencies of PAHs at the same extraction conditions reflected dissimilarities between environmental matrices investigated. Selective subcritical water extraction of PAHs was proportional to their octanol-water partition coefficients. This technique may be applicable in evaluation of risks associated with PAH contaminated sites and in assessments of their bioremediation potential.

U2 - 10.1016/j.chemosphere.2009.11.029

DO - 10.1016/j.chemosphere.2009.11.029

M3 - Article

VL - 78

SP - 1042

EP - 1048

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

IS - 8

ER -