Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.jhazmat.2011.02.024
Title (Primary) Photostability and toxicity of pentachlorophenol and phenanthrene
Author Agbo, S.O.; Küster, E. ORCID logo ; Georgi, A.; Akkanen, J.; Leppänen, M.T.; Kukkonen, J.V.K.
Source Titel Journal of Hazardous Materials
Year 2011
Volume 189
Issue 1-2
Page From 235
Page To 240
Language 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.
Persistent UFZ Identifier
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