Passive Samplers Provide a Better Prediction of PAH Bioaccumulation in Earthworms and Plant Roots than Exhaustive, Mild Solvent, and Cyclodextrin Extractions.

Jose L. Gomez-Eyles; Michiel T. O. Jonker; Mark E. Hodson; Chris D. Collins

doi:10.1021/es203499m

Passive Samplers Provide a Better Prediction of PAH Bioaccumulation in Earthworms and Plant Roots than Exhaustive, Mild Solvent, and Cyclodextrin Extractions.

Jose L. Gomez-Eyles, Michiel T. O. Jonker, Mark E. Hodson, Chris D. Collins

Environment and Geography

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

Abstract

A number of extraction methods have been developed to assess polycyclic aromatic hydrocarbon (PAR) bioavailability in soils. As these methods are rarely tested in a comparative manner, against different test organisms, and using field-contaminated soils, it is unclear which method gives the most accurate measure of the actual soil ecosystem exposure. In this study, PAH bioavailability was assessed in ten field-contaminated soils by using exhaustive acetone/hexane extractions, mild solvent (butanol) extractions, cyclodextrin extractions, and two passive sampling methods; solid phase micro extraction (SPME) and polyoxymethylene solid phase extraction (POM-SPE). Results were compared to actual PAR bioaccumulation in earthworms (Eisenia fetida) and rye grass (Lolium multiflorum) roots. Exhaustive, mild solvent and cyclodextrin extractions consistently overpredicted biotic concentrations by a factor of 10-10 000 and therefore seem inappropriate for predicting PAR bioaccumulation in field contaminated soils. In contrast, passive samplers generally predicted PAH concentrations in earthworms within a :Factor of 10, although correlations between predicted and measured concentrations were considerably scattered. The same applied to the plant data, where passive samplers also tended to underpredict root concentrations. These results indicate, the potential of passive samplers to predict PAH bioaccumulation, yet call for comparative studies between passive samplers and. further research on plant bioavailability.

Original language	English
Pages (from-to)	962-969
Number of pages	8
Journal	Environmental science & technology
Volume	46
Issue number	2
DOIs	https://doi.org/10.1021/es203499m
Publication status	Published - 17 Jan 2012

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title = "Passive Samplers Provide a Better Prediction of PAH Bioaccumulation in Earthworms and Plant Roots than Exhaustive, Mild Solvent, and Cyclodextrin Extractions.",

abstract = "A number of extraction methods have been developed to assess polycyclic aromatic hydrocarbon (PAR) bioavailability in soils. As these methods are rarely tested in a comparative manner, against different test organisms, and using field-contaminated soils, it is unclear which method gives the most accurate measure of the actual soil ecosystem exposure. In this study, PAH bioavailability was assessed in ten field-contaminated soils by using exhaustive acetone/hexane extractions, mild solvent (butanol) extractions, cyclodextrin extractions, and two passive sampling methods; solid phase micro extraction (SPME) and polyoxymethylene solid phase extraction (POM-SPE). Results were compared to actual PAR bioaccumulation in earthworms (Eisenia fetida) and rye grass (Lolium multiflorum) roots. Exhaustive, mild solvent and cyclodextrin extractions consistently overpredicted biotic concentrations by a factor of 10-10 000 and therefore seem inappropriate for predicting PAR bioaccumulation in field contaminated soils. In contrast, passive samplers generally predicted PAH concentrations in earthworms within a :Factor of 10, although correlations between predicted and measured concentrations were considerably scattered. The same applied to the plant data, where passive samplers also tended to underpredict root concentrations. These results indicate, the potential of passive samplers to predict PAH bioaccumulation, yet call for comparative studies between passive samplers and. further research on plant bioavailability.",

author = "Gomez-Eyles, {Jose L.} and Jonker, {Michiel T. O.} and Hodson, {Mark E.} and Collins, {Chris D.}",

year = "2012",

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Passive Samplers Provide a Better Prediction of PAH Bioaccumulation in Earthworms and Plant Roots than Exhaustive, Mild Solvent, and Cyclodextrin Extractions. / Gomez-Eyles, Jose L.; Jonker, Michiel T. O.; Hodson, Mark E. et al.

In: Environmental science & technology, Vol. 46, No. 2, 17.01.2012, p. 962-969.

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

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AU - Hodson, Mark E.

AU - Collins, Chris D.

PY - 2012/1/17

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AB - A number of extraction methods have been developed to assess polycyclic aromatic hydrocarbon (PAR) bioavailability in soils. As these methods are rarely tested in a comparative manner, against different test organisms, and using field-contaminated soils, it is unclear which method gives the most accurate measure of the actual soil ecosystem exposure. In this study, PAH bioavailability was assessed in ten field-contaminated soils by using exhaustive acetone/hexane extractions, mild solvent (butanol) extractions, cyclodextrin extractions, and two passive sampling methods; solid phase micro extraction (SPME) and polyoxymethylene solid phase extraction (POM-SPE). Results were compared to actual PAR bioaccumulation in earthworms (Eisenia fetida) and rye grass (Lolium multiflorum) roots. Exhaustive, mild solvent and cyclodextrin extractions consistently overpredicted biotic concentrations by a factor of 10-10 000 and therefore seem inappropriate for predicting PAR bioaccumulation in field contaminated soils. In contrast, passive samplers generally predicted PAH concentrations in earthworms within a :Factor of 10, although correlations between predicted and measured concentrations were considerably scattered. The same applied to the plant data, where passive samplers also tended to underpredict root concentrations. These results indicate, the potential of passive samplers to predict PAH bioaccumulation, yet call for comparative studies between passive samplers and. further research on plant bioavailability.

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Passive Samplers Provide a Better Prediction of PAH Bioaccumulation in Earthworms and Plant Roots than Exhaustive, Mild Solvent, and Cyclodextrin Extractions.

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