Cristin-resultat-ID: 1177416
Sist endret: 9. mai 2015, 17:46
NVI-rapporteringsår: 2014
Resultat
Vitenskapelig artikkel
2015

Photodegradation in natural waters of nitrosamines and nitramines derived from CO2 capture plant operation

Bidragsytere:
  • Lisbet Sørensen
  • Kolbjørn Zahlsen
  • Astrid Hyldbakk
  • Eirik Falck da Silva og
  • Andy Booth

Tidsskrift

International Journal of Greenhouse Gas Control
ISSN 1750-5836
e-ISSN 1878-0148
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2015
Publisert online: 2014
Trykket: 2015
Volum: 32
Sider: 106 - 114

Importkilder

Scopus-ID: 2-s2.0-84913554306

Beskrivelse Beskrivelse

Tittel

Photodegradation in natural waters of nitrosamines and nitramines derived from CO2 capture plant operation

Sammendrag

Amine solvents used in post combustion CO2 capture (PCCC) plants react with NOx, forming carcinogenic nitrosamine and nitramine compounds. These can be emitted to the atmosphere, undergoing deposition to aquatic and terrestrial environments. In the current study, the hydrolytic and photolytic degradation of nine nitramines and nitrosamines identified as possible degradation products of 2-monoethanolamine and piperazine solvents are studied. Nitrosamines and nitramines are generally resistant to hydrolysis, although nitrosopiperazine and piperazine nitramine both undergo up to 50 % degradation at 50 °C and pH 7, but not at lower temperatures or other pH values. Owing to absorbance at ~340 nm, the nitrosamines degrade rapidly in aqueous solution when exposed to sunlight (half-lives in the range 6-11 minutes), whilst nitramines are photolytically stable. Light screening by natural organic matter (1-100 mg/L) lead to an ~3-fold decrease in nitrosodiethanolamine (NDELA; 1 mg/L) degradation rate. A theoretical study indicates environmentally relevant concentrations of NDELA may be persistent due to competition with NOM for photons. The main photodegradation products are identified for each nitrosamine, and degradation mechanisms suggested.

Bidragsytere

Lisbet Sørensen

  • Tilknyttet:
    Forfatter
    ved Klima og miljø ved SINTEF Ocean

Kolbjørn Zahlsen

  • Tilknyttet:
    Forfatter
    ved Bioteknologi og nanomedisin ved SINTEF AS

Astrid Hyldbakk

  • Tilknyttet:
    Forfatter
    ved Bioteknologi og nanomedisin ved SINTEF AS

Eirik Falck da Silva

  • Tilknyttet:
    Forfatter
    ved Prosessteknologi ved SINTEF AS

Andrew Booth

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