Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1016/j.jhazmat.2011.02.024
Titel (primär) Photostability and toxicity of pentachlorophenol and phenanthrene
Autor Agbo, S.O.; Küster, E. ORCID logo ; Georgi, A.; Akkanen, J.; Leppänen, M.T.; Kukkonen, J.V.K.
Quelle Journal of Hazardous Materials
Erscheinungsjahr 2011
Band/Volume 189
Heft 1-2
Seite von 235
Seite bis 240
Sprache englisch
Keywords Photodegradation; Daphnia magna; Irradiation; Immobilization; EC50
Abstract Fate of organic contaminants under UV irradiation as environmental variable was studied. Aqueous solutions of pentachlorophenol and phenanthrene were subjected to simulated solar radiation and monitored during =93 h. Immobilization tests were conducted using Daphnia magna neonates in pre-irradiated water for the assessment of photoproduct-mediated toxicity. We observed a time-dependent decrease in exposure concentrations following irradiation, which correlated positively with reduced immobilization of the animals. A complete disappearance of the lowest and highest concentrations of pentachlorophenol was noted after 25 h and 75 h, respectively. Survivorship of the animals increased until 100% and correlated positively with irradiation time. However, phenanthrene was rather persistent under irradiation, with less than 25% decline in exposure concentrations after 93 h. Neonates were not immobilized at maximum aqueous solubility of phenanthrene. Rate constants (k) for the photodegradation of pentachlorophenol at 0.41, 0.59, 1.1, and 2.1 mg l-1 were in the range of 7.2 × 10-2 and 4.9 × 10-2 h-1, showing a slight decrease with increasing initial pentachlorophenol concentration. Nonetheless, pentachlorophenol degradation in the studied concentration range could still be described by the pseudo-first-order kinetics. K values for phenanthrene at 0.12 and 0.22 mg l-1 were 2.9 × 10-3 h-1 and 4.2 × 10-3 h-1, respectively.
dauerhafte UFZ-Verlinkung
Agbo, S.O., Küster, E., Georgi, A., Akkanen, J., Leppänen, M.T., Kukkonen, J.V.K. (2011):
Photostability and toxicity of pentachlorophenol and phenanthrene
J. Hazard. Mater. 189 (1-2), 235 - 240 10.1016/j.jhazmat.2011.02.024