Cristin-resultat-ID: 1334925
Sist endret: 23. januar 2017, 12:15
NVI-rapporteringsår: 2016
Resultat
Vitenskapelig artikkel
2016

Carbon Nanotube Properties Influence Adsorption of Phenanthrene and Subsequent Bioavailability and Toxicity to Pseudokirchneriella subcapitata

Bidragsytere:
  • Berit Glomstad
  • Dag Altin
  • Lisbet Sørensen
  • Jingfu Liu
  • Bjørn Munro Jenssen og
  • Andy Booth

Tidsskrift

Environmental Science and Technology
ISSN 0013-936X
e-ISSN 1520-5851
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2016
Publisert online: 2016
Trykket: 2016
Volum: 50
Hefte: 5
Sider: 2660 - 2668
Open Access

Importkilder

Scopus-ID: 2-s2.0-84960154410

Beskrivelse Beskrivelse

Tittel

Carbon Nanotube Properties Influence Adsorption of Phenanthrene and Subsequent Bioavailability and Toxicity to Pseudokirchneriella subcapitata

Sammendrag

The bioavailability of organic contaminants adsorbed to carbon nanotubes (CNTs) remains unclear, especially in complex natural freshwaters containing natural organic matter (NOM). Here, we report on the adsorption capacity (Q0) of five CNTs exhibiting different physicochemical properties, including a single-walled CNT (SWCNTs), multiwalled CNTs (MWCNT-15 and MWCNT-30), and functionalized MWCNTs (hydroxyl, −OH, and carboxyl, −COOH), for the model polycyclic aromatic hydrocarbon phenanthrene (3.1−800 μg/L). The influence of phenanthrene adsorption by the CNTs on bioavailability and toxicity was investigated using the freshwater algae Pseudokirchneriella subcapitata. CNTs were dispersed in algal growth media containing NOM (DOC, 8.77 mg/L; dispersed concentrations: 0.5, 1.3, 1.3, 3.3, and 6.1 mg/L for SWCNT, MWCNT-15, MWCNT-30, MWCNT−OH, and MWCNT−COOH, respectively). Adsorption isotherms of phenanthrene to the dispersed CNTs were fitted with the Dubinin−Ashtakhov model. Q0 differed among the CNTs, increasing with increasing surface area and decreasing with surface functionalization. SWCNT and MWCNT−COOH exhibited the highest and lowest log Q0 (8.891 and 7.636 μg/kg, respectively). The presence of SWCNTs reduced phenanthrene toxicity to algae (EC50; 528.4) compared to phenanthrene-only (EC50; 438.3), and the presence of MWCNTs had no significant effect on phenanthrene toxicity. However, phenanthrene adsorbed to NOM-dispersed CNTs proved to be bioavailable and contribute to exert toxicity to P. subcapitata.

Bidragsytere

Berit Glomstad

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

Dag Altin

  • Tilknyttet:
    Forfatter
    ved Diverse norske bedrifter og organisasjoner

Lisbet Sørensen

  • Tilknyttet:
    Forfatter
    ved Klima og miljø ved SINTEF Ocean

Jingfu Liu

  • Tilknyttet:
    Forfatter
    ved Chinese Academy of Sciences

Bjørn Munro Jenssen

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