Effects of Superdispersant-25 on the sorption dynamics of naphthalene and phenanthrene in marine sediments

Luis J. Perez Calderon* (Corresponding Author), Lloyd D. Potts, Alejandro Gallego, James A. Anderson, Ursula Witte

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Purpose: The present study evaluated the effects of Superdispersant-25 (SD25), a commercial dispersant stockpiled in the UK for oil spill response, on the sorption dynamics of two polyaromatic hydrocarbons, naphthalene (NAP) and phenanthrene (PHE), in sediment-seawater systems using three sediments near hydrocarbon exploration areas in the Faroe-Shetland Channel and North Sea. Materials and methods: Batch experiments were conducted to evaluate the effects of SD25 on the solubility (analysed by gas chromatography), distribution coefficients and desorption hysteresis of NAP and PHE separately as well as SD25 in the three sediments (analysed by UV-vis spectroscopy and surface tension measurements, respectively). Results and discussion: The results revealed that SD25 readily adsorbed to all sediment types but did not desorb from silty loam. SD25 application increased the solubility in seawater of PHE but not of NAP. Adsorbed SD25 increased the distribution coefficients of both polyaromatic hydrocarbons in sand but not silty loam and the solubilising effect of SD25 appeared to drive increased adsorption of PHE rather than sediment-adsorbed SD25 concentration. Conclusions: The findings highlight the influence of SD25 application on the sorption dynamics of NAP and PHE in marine sediments from areas near hydrocarbon exploration and production regions. An understanding of these interactions may aid responders in the decision-making process of dispersant application in the event of a spill as seabed characteristics affect oil-dispersant-sediment interactions.

Original languageEnglish
Pages (from-to)1576-1586
Number of pages11
JournalJournal of Soils and Sediments
Volume19
Issue number3
Early online date26 Oct 2018
DOIs
Publication statusPublished - Mar 2019

Fingerprint

phenanthrene
naphthalene
marine sediment
sorption
dispersant
sediment
silty loam
hydrocarbon exploration
solubility
hydrocarbon
oil spill response
seawater
surface tension
hysteresis
effect
desorption
gas chromatography
spectroscopy
decision making
adsorption

Keywords

  • Dispersant
  • Naphthalene
  • Oil spill
  • PAHs
  • Phenanthrene
  • Sediment
  • Solubility
  • Sorption

ASJC Scopus subject areas

  • Earth-Surface Processes
  • Stratigraphy

Cite this

Effects of Superdispersant-25 on the sorption dynamics of naphthalene and phenanthrene in marine sediments. / Perez Calderon, Luis J. (Corresponding Author); Potts, Lloyd D.; Gallego, Alejandro; Anderson, James A.; Witte, Ursula.

In: Journal of Soils and Sediments, Vol. 19, No. 3, 03.2019, p. 1576-1586.

Research output: Contribution to journalArticle

Perez Calderon, Luis J. ; Potts, Lloyd D. ; Gallego, Alejandro ; Anderson, James A. ; Witte, Ursula. / Effects of Superdispersant-25 on the sorption dynamics of naphthalene and phenanthrene in marine sediments. In: Journal of Soils and Sediments. 2019 ; Vol. 19, No. 3. pp. 1576-1586.
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title = "Effects of Superdispersant-25 on the sorption dynamics of naphthalene and phenanthrene in marine sediments",
abstract = "Purpose: The present study evaluated the effects of Superdispersant-25 (SD25), a commercial dispersant stockpiled in the UK for oil spill response, on the sorption dynamics of two polyaromatic hydrocarbons, naphthalene (NAP) and phenanthrene (PHE), in sediment-seawater systems using three sediments near hydrocarbon exploration areas in the Faroe-Shetland Channel and North Sea. Materials and methods: Batch experiments were conducted to evaluate the effects of SD25 on the solubility (analysed by gas chromatography), distribution coefficients and desorption hysteresis of NAP and PHE separately as well as SD25 in the three sediments (analysed by UV-vis spectroscopy and surface tension measurements, respectively). Results and discussion: The results revealed that SD25 readily adsorbed to all sediment types but did not desorb from silty loam. SD25 application increased the solubility in seawater of PHE but not of NAP. Adsorbed SD25 increased the distribution coefficients of both polyaromatic hydrocarbons in sand but not silty loam and the solubilising effect of SD25 appeared to drive increased adsorption of PHE rather than sediment-adsorbed SD25 concentration. Conclusions: The findings highlight the influence of SD25 application on the sorption dynamics of NAP and PHE in marine sediments from areas near hydrocarbon exploration and production regions. An understanding of these interactions may aid responders in the decision-making process of dispersant application in the event of a spill as seabed characteristics affect oil-dispersant-sediment interactions.",
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note = "Acknowledgements: The authors acknowledge the assistance of Mike Mcgibbon in analysing carbon content, the crews of the MRV Scotia and MRV Temora for sample collection. Dr. Hedda Weitz and Prof. Graeme Patton are thanked for facilitating access to laboratory space and equipment. Funding information: LJP was funded through MarCRF funds for a PhD project designed by UW, JA and AG and awarded to LJP.",
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T1 - Effects of Superdispersant-25 on the sorption dynamics of naphthalene and phenanthrene in marine sediments

AU - Perez Calderon, Luis J.

AU - Potts, Lloyd D.

AU - Gallego, Alejandro

AU - Anderson, James A.

AU - Witte, Ursula

N1 - Acknowledgements: The authors acknowledge the assistance of Mike Mcgibbon in analysing carbon content, the crews of the MRV Scotia and MRV Temora for sample collection. Dr. Hedda Weitz and Prof. Graeme Patton are thanked for facilitating access to laboratory space and equipment. Funding information: LJP was funded through MarCRF funds for a PhD project designed by UW, JA and AG and awarded to LJP.

PY - 2019/3

Y1 - 2019/3

N2 - Purpose: The present study evaluated the effects of Superdispersant-25 (SD25), a commercial dispersant stockpiled in the UK for oil spill response, on the sorption dynamics of two polyaromatic hydrocarbons, naphthalene (NAP) and phenanthrene (PHE), in sediment-seawater systems using three sediments near hydrocarbon exploration areas in the Faroe-Shetland Channel and North Sea. Materials and methods: Batch experiments were conducted to evaluate the effects of SD25 on the solubility (analysed by gas chromatography), distribution coefficients and desorption hysteresis of NAP and PHE separately as well as SD25 in the three sediments (analysed by UV-vis spectroscopy and surface tension measurements, respectively). Results and discussion: The results revealed that SD25 readily adsorbed to all sediment types but did not desorb from silty loam. SD25 application increased the solubility in seawater of PHE but not of NAP. Adsorbed SD25 increased the distribution coefficients of both polyaromatic hydrocarbons in sand but not silty loam and the solubilising effect of SD25 appeared to drive increased adsorption of PHE rather than sediment-adsorbed SD25 concentration. Conclusions: The findings highlight the influence of SD25 application on the sorption dynamics of NAP and PHE in marine sediments from areas near hydrocarbon exploration and production regions. An understanding of these interactions may aid responders in the decision-making process of dispersant application in the event of a spill as seabed characteristics affect oil-dispersant-sediment interactions.

AB - Purpose: The present study evaluated the effects of Superdispersant-25 (SD25), a commercial dispersant stockpiled in the UK for oil spill response, on the sorption dynamics of two polyaromatic hydrocarbons, naphthalene (NAP) and phenanthrene (PHE), in sediment-seawater systems using three sediments near hydrocarbon exploration areas in the Faroe-Shetland Channel and North Sea. Materials and methods: Batch experiments were conducted to evaluate the effects of SD25 on the solubility (analysed by gas chromatography), distribution coefficients and desorption hysteresis of NAP and PHE separately as well as SD25 in the three sediments (analysed by UV-vis spectroscopy and surface tension measurements, respectively). Results and discussion: The results revealed that SD25 readily adsorbed to all sediment types but did not desorb from silty loam. SD25 application increased the solubility in seawater of PHE but not of NAP. Adsorbed SD25 increased the distribution coefficients of both polyaromatic hydrocarbons in sand but not silty loam and the solubilising effect of SD25 appeared to drive increased adsorption of PHE rather than sediment-adsorbed SD25 concentration. Conclusions: The findings highlight the influence of SD25 application on the sorption dynamics of NAP and PHE in marine sediments from areas near hydrocarbon exploration and production regions. An understanding of these interactions may aid responders in the decision-making process of dispersant application in the event of a spill as seabed characteristics affect oil-dispersant-sediment interactions.

KW - Dispersant

KW - Naphthalene

KW - Oil spill

KW - PAHs

KW - Phenanthrene

KW - Sediment

KW - Solubility

KW - Sorption

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