Cristin-resultat-ID: 1267392
Sist endret: 24. september 2015, 15:36
Resultat
Poster
2015

Adsorption of phenanthrene to carbon nanotubes: Influence on PAH bioavailability and ecotoxicity

Bidragsytere:
  • Andy Booth
  • Florian Zindler
  • Berit Glomstad
  • Lisbet Irene Rønne Støen og
  • Dag Altin

Presentasjon

Navn på arrangementet: European Materials Reseach Society (E-MRS) Fall 2015 Conference
Sted: Warsaw
Dato fra: 15. september 2015
Dato til: 18. september 2015

Arrangør:

Arrangørnavn: European Materials Reseach Society

Om resultatet

Poster
Publiseringsår: 2015

Beskrivelse Beskrivelse

Tittel

Adsorption of phenanthrene to carbon nanotubes: Influence on PAH bioavailability and ecotoxicity

Sammendrag

In the present study, the influence of phenanthrene adsorption to aqueous dispersions of 5 different CNTs containing dissolved natural organic matter (NOM) was investigated on the bioavailability and subsequent ecotoxicity of dissolved phenanthrene to standard freshwater test species. The study employed the microalga Pseudokirchneriella subcapitata and the cladoceran water flea Daphnia magna which represent two different trophic levels. In addition, the direct ecotoxicity of the CNT suite was investigated with both species at environmentally realistic dispersion concentrations. A significant change in phenanthrene toxicity to P. subcapitata was only seen in the presence of one type of CNT (SWCNT) when considering total phenanthrene concentration in the system. However, based on the measured concentrations of phenanthrene in the water phase, an increase in toxicity in the presence of CNTs was observed relative to phenanthrene only. This indicates that not only the phenanthrene remaining in the water, but also the phenanthrene adsorbed to CNTs, is available to the algae. In the case of D. magna, adsorption to CNTs reduces overall bioavailability of phenanthrene for some CNT types. However, a significant proportion of adsorbed phenanthrene remains bioavailable. Microscopy images show significant ingestion of CNTs by D. magna, which may offer an alternative route for phenanthrene uptake and toxicity.

Bidragsytere

Andrew Booth

Bidragsyterens navn vises på dette resultatet som Andy Booth
  • Tilknyttet:
    Forfatter
    ved Klima og miljø ved SINTEF Ocean

Florian Zindler

  • Tilknyttet:
    Forfatter

Berit Glomstad

  • Tilknyttet:
    Forfatter
    ved Institutt for biologi ved Norges teknisk-naturvitenskapelige universitet

Lisbet Irene Rønne Støen

  • Tilknyttet:
    Forfatter
    ved Klima og miljø ved SINTEF Ocean

Dag Altin

  • Tilknyttet:
    Forfatter
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