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Title: Photokinetics of azaarenes and toxicity of phototransformation products to the marine diatom phaeodactylum tricornutum

Abstract

UV radiation is absorbed by PAHs, structurally altering these compounds into a variety of oxygenated products. Until recently, only hazards of parental PAHs in the environment were investigated. This study aims to determine the fate and effects of azaarenes (N-heterocyclic PAHs) together with their photoproducts in marine environments. Photoreaction kinetics of eight asaarenes, ranging from two-ringed to five-ringed structures, were examined using two different light sources: one with an emission peak at 300 nm (UV-B) and the other with an emission peak at 350 nm (UV-A). Azaarenes degraded rapidly in the presence of short-waved light, UV-B being more effective than UV-A. Especially preexposure of azaarenes to UV-A radiation led to products toxic to the marine diatom Phaeodactylum tricornutum. Since UV-A constitutes a larger fraction of sunlight at the earth surface and in the water column, photolysis by UV-A may increase the toxic risk of aromatic compounds in the marine environment.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Univ. of Amsterdam, Kruislaan (NL)
OSTI Identifier:
20006153
Resource Type:
Journal Article
Resource Relation:
Journal Name: Environmental Science and Technology; Journal Volume: 33; Journal Issue: 23; Other Information: PBD: 1 Dec 1999
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 56 BIOLOGY AND MEDICINE, APPLIED STUDIES; AZAARENES; WATER POLLUTION; WATER CHEMISTRY; PHOTOCHEMICAL REACTIONS; DIATOMS; TOXICITY

Citation Formats

Wiegman, S., Vlaardingen, P.L.A. van, Peijnenburg, W.J.G.M., Beusekom, S.A.M. van, Kraak, M.H.S., and Admiraal, W.. Photokinetics of azaarenes and toxicity of phototransformation products to the marine diatom phaeodactylum tricornutum. United States: N. p., 1999. Web. doi:10.1021/es990228q.
Wiegman, S., Vlaardingen, P.L.A. van, Peijnenburg, W.J.G.M., Beusekom, S.A.M. van, Kraak, M.H.S., & Admiraal, W.. Photokinetics of azaarenes and toxicity of phototransformation products to the marine diatom phaeodactylum tricornutum. United States. doi:10.1021/es990228q.
Wiegman, S., Vlaardingen, P.L.A. van, Peijnenburg, W.J.G.M., Beusekom, S.A.M. van, Kraak, M.H.S., and Admiraal, W.. Wed . "Photokinetics of azaarenes and toxicity of phototransformation products to the marine diatom phaeodactylum tricornutum". United States. doi:10.1021/es990228q.
@article{osti_20006153,
title = {Photokinetics of azaarenes and toxicity of phototransformation products to the marine diatom phaeodactylum tricornutum},
author = {Wiegman, S. and Vlaardingen, P.L.A. van and Peijnenburg, W.J.G.M. and Beusekom, S.A.M. van and Kraak, M.H.S. and Admiraal, W.},
abstractNote = {UV radiation is absorbed by PAHs, structurally altering these compounds into a variety of oxygenated products. Until recently, only hazards of parental PAHs in the environment were investigated. This study aims to determine the fate and effects of azaarenes (N-heterocyclic PAHs) together with their photoproducts in marine environments. Photoreaction kinetics of eight asaarenes, ranging from two-ringed to five-ringed structures, were examined using two different light sources: one with an emission peak at 300 nm (UV-B) and the other with an emission peak at 350 nm (UV-A). Azaarenes degraded rapidly in the presence of short-waved light, UV-B being more effective than UV-A. Especially preexposure of azaarenes to UV-A radiation led to products toxic to the marine diatom Phaeodactylum tricornutum. Since UV-A constitutes a larger fraction of sunlight at the earth surface and in the water column, photolysis by UV-A may increase the toxic risk of aromatic compounds in the marine environment.},
doi = {10.1021/es990228q},
journal = {Environmental Science and Technology},
number = 23,
volume = 33,
place = {United States},
year = {Wed Dec 01 00:00:00 EST 1999},
month = {Wed Dec 01 00:00:00 EST 1999}
}