Photolytic transformation products and biological stability of the hydrological tracer Uranine

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Authors

Among many fluorescence tracers, Uranine (sodium fluorescein, UR) has most widely been used in hydrological research. Extensive use of UR for tracing experiments or commercial use might cause a potential risk of long-term environmental contamination. As any organic substance released to the environment, also UR is subjected to chemical and physical reactions that can be chemical, biological and photolysis processes. These processes transform the parent compound (PC) and have not been extensively investigated for UR. This study applies two OECDs (301 D and 301 F) tests and a screening water sediment test (WST) to investigate the biodegradability of the PC. Photolysis in water was explored by Xe lamp irradiation. Subsequently, the biodegradability of the photolysis mixtures was examined. The primary elimination of UR was monitored and structures of its transformation products (TPs) were elucidated by HPLC-FLD-MS/MS. UR was found not readily biodegradable, although small degradation rates could be observed in the OECD 301 D and WST. HPLC-FLD analysis showed high primary elimination of the tracer during photolysis. However, the low degree of mineralization found indicates that the UR was not fully degraded, instead transformed to TPs. A total of 5 photo-TPs were identified. According to MS/MS data, chemical structures could be proposed for all identified photo-TPs. Likewise the parent compound it was demonstrated that photo-TPs were largely recalcitrant to microbial degradation. Although we did not find indications for toxicity, target-oriented studies on the environmental impact of these photo-TPs are warranted. Results obtained in this study show that deeper investigations are necessary to fully understand fate and risk connected to the use of UR.

OriginalspracheEnglisch
ZeitschriftThe Science of The Total Environment
Jahrgang533
Seiten (von - bis)446-453
Anzahl der Seiten8
ISSN0048-9697
DOIs
PublikationsstatusErschienen - 15.11.2015

DOI

Zuletzt angesehen

Publikationen

  1. The Birth of Difference
  2. Informationskompetenz von Pädagogen
  3. Formative Dimensions for Green and Sustainable Chemical Education
  4. § 4 The international legal framework governing the TCA
  5. Ideological Construction of Deviance in Street Children’s Discourse in Southwestern Nigeria
  6. A note on the granular nature of imports in German manufacturing industries
  7. The Career of a Catalogue: Organizational Memory, Materiality and the Dual Nature of the Past at the British Museum (1970-Today)
  8. Koproduktives Stadtmachen als Motor der Quartiersentwicklung?
  9. Gründungslehrstühle an Universitäten
  10. Antonio Negri. Une philosophie de la subversion
  11. Conservation management of eastern Australian farmland birds in relation to landscape gradients
  12. Arzneimittelrückstände in Trinkwasser und Gewässern
  13. Impact of prescribed burning on a heathland inhabiting spider community
  14. Lieferkettensorgfaltspflichtengesetz
  15. Einfluss von Nutzung auf die Gefäßpflanzenvielfalt in Wäldern
  16. Unter Druck und Zwang
  17. Good Governance
  18. Die Wechselwirkung zwischen Migrations- und Armutserfahrungen
  19. Augmented Reality als Bildungsenhancement?
  20. Leben als Geborene – Handeln in Beziehung
  21. Postmodern Epistemology in Organization Studies
  22. The benefit of long-term growth hormone (GH) replacement therapy in hypopituitary adults with GH deficiency
  23. Die Ozonung von biologisch gereinigtem Abwasser
  24. Innovative IT-gestützte Ansätze zur Bewertung der Gesprächsqualität in Telefonverkaufsgesprächen
  25. Chronic ecotoxic effects to Pseudomonas putida and Vibrio fischeri, and cytostatic and genotoxic effects to the hepatoma cell line (HepG2) of ofloxacin photo(cata)lytically treated solutions
  26. Äußere Souveränität
  27. Symbolische Erfahrung und symbolische Wirklichkeit
  28. Energiepolitik