Is Fucus a suitable biomonitoring organism for polycyclic aromatic hydrocarbon contamination? A study from the Faroe Islands

Ida Huusmann Knøfler, Kirstine Evald Andersen, Richard Leonard Becker, Sigurd Christiansen, Nikoline Juul Nielsen, Jan H. Christensen

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Abstract

To evaluate seaweed as a biomonitoring organism, Fucus was sampled in the Faroe Islands. Nineteen PAHs, including the EPA 16, and four groups of alkylated PAHs were quantified using GC–MS analysis of extracts obtained using a modified QuEchERS method with ultrasonication in acetonitrile, back-extraction into hexane, and Florisil® cleanup. Samples from the harbor of Tórshavn collected at high tide were the most polluted with PAH concentrations between 1.3 × 102 and 1.7 × 102 ng/g wet weight. All samples contained a factor 10 higher concentrations of alkylated PAHs compared to their parent compounds. These results suggest that Fucus might be suitable as a biomonitoring organism for PAH pollution. Differences between samples collected in close proximity and on different days were observed (same range of RSD 14–120% and 60–102%, respectively), suggesting that water exchange, tide levels, and direct exposure to surface diesel pollution have a strong influence on pollutant uptake in Fucus. The findings stress the need for further evaluation of the sampling strategy.
Original languageEnglish
Number of pages14
JournalEnvironmental Science and Pollution Research International
DOIs
Publication statusPublished - 8 Mar 2024

Keywords

  • Seaweed
  • PAHs
  • Marine pollution
  • Alkylated PAHs
  • GC-MS

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