Abstract
Crude oil released into the environment contains many polycyclic aromatic hydrocarbons (PAHs). Alkylated PAHs are more abundant than unsubstituted PAHs and their toxicity is also of serious concern. Among the various physical, chemical, and biological weathering processes of crude oils, photodegradation is one of the most important for determining the environmental fate of oil residues. In this study, the photodegradation rate constants of naphthalene and alkylated naphthalenes were determined under simulated laboratory conditions at different temperature. Changes in the luminescence inhibition of Aliivibrio fischeri, as an indicator of the baseline toxicity, were observed in photodegradation mixtures. The major transformation products were also identified by gas chromatography–mass spectrometry. The photodegradation of naphthalene and the eight alkylated naphthalenes was described well by pseudo-first-order kinetics regardless of experimental temperature. The measured toxicity of the reaction mixtures obtained by photodegradative weathering slightly increased initially and then decreased with further weathering. In all cases, the observed toxicity was greater than accounted for by the parent compounds, indicating that the photodegradation products also contributed significantly to the overall toxicity of the mixtures. The identified photodegradation products were mostly oxygenated compounds such as alcohols, aldehydes, ketones, and quinones, which warrant further investigation.
| Original language | English |
|---|---|
| Pages (from-to) | 656-664 |
| Number of pages | 9 |
| Journal | Chemosphere |
| Volume | 222 |
| DOIs | |
| Publication status | Published - 2019 May 1 |
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Keywords
- Alkylated naphthalenes
- Mixture toxicity
- Oil spill
- Photodegradation
- Photodegradation products
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Chemistry
- Chemistry(all)
- Pollution
- Health, Toxicology and Mutagenesis
Cite this
Changes in ecotoxicity of naphthalene and alkylated naphthalenes during photodegradation in water. / Kang, Hyun Joong; Jung, Yerin; Kwon, Jung-Hwan.
In: Chemosphere, Vol. 222, 01.05.2019, p. 656-664.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Changes in ecotoxicity of naphthalene and alkylated naphthalenes during photodegradation in water
AU - Kang, Hyun Joong
AU - Jung, Yerin
AU - Kwon, Jung-Hwan
PY - 2019/5/1
Y1 - 2019/5/1
N2 - Crude oil released into the environment contains many polycyclic aromatic hydrocarbons (PAHs). Alkylated PAHs are more abundant than unsubstituted PAHs and their toxicity is also of serious concern. Among the various physical, chemical, and biological weathering processes of crude oils, photodegradation is one of the most important for determining the environmental fate of oil residues. In this study, the photodegradation rate constants of naphthalene and alkylated naphthalenes were determined under simulated laboratory conditions at different temperature. Changes in the luminescence inhibition of Aliivibrio fischeri, as an indicator of the baseline toxicity, were observed in photodegradation mixtures. The major transformation products were also identified by gas chromatography–mass spectrometry. The photodegradation of naphthalene and the eight alkylated naphthalenes was described well by pseudo-first-order kinetics regardless of experimental temperature. The measured toxicity of the reaction mixtures obtained by photodegradative weathering slightly increased initially and then decreased with further weathering. In all cases, the observed toxicity was greater than accounted for by the parent compounds, indicating that the photodegradation products also contributed significantly to the overall toxicity of the mixtures. The identified photodegradation products were mostly oxygenated compounds such as alcohols, aldehydes, ketones, and quinones, which warrant further investigation.
AB - Crude oil released into the environment contains many polycyclic aromatic hydrocarbons (PAHs). Alkylated PAHs are more abundant than unsubstituted PAHs and their toxicity is also of serious concern. Among the various physical, chemical, and biological weathering processes of crude oils, photodegradation is one of the most important for determining the environmental fate of oil residues. In this study, the photodegradation rate constants of naphthalene and alkylated naphthalenes were determined under simulated laboratory conditions at different temperature. Changes in the luminescence inhibition of Aliivibrio fischeri, as an indicator of the baseline toxicity, were observed in photodegradation mixtures. The major transformation products were also identified by gas chromatography–mass spectrometry. The photodegradation of naphthalene and the eight alkylated naphthalenes was described well by pseudo-first-order kinetics regardless of experimental temperature. The measured toxicity of the reaction mixtures obtained by photodegradative weathering slightly increased initially and then decreased with further weathering. In all cases, the observed toxicity was greater than accounted for by the parent compounds, indicating that the photodegradation products also contributed significantly to the overall toxicity of the mixtures. The identified photodegradation products were mostly oxygenated compounds such as alcohols, aldehydes, ketones, and quinones, which warrant further investigation.
KW - Alkylated naphthalenes
KW - Mixture toxicity
KW - Oil spill
KW - Photodegradation
KW - Photodegradation products
UR - http://www.scopus.com/inward/record.url?scp=85060970198&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85060970198&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2019.01.153
DO - 10.1016/j.chemosphere.2019.01.153
M3 - Article
C2 - 30731386
AN - SCOPUS:85060970198
VL - 222
SP - 656
EP - 664
JO - Chemosphere
JF - Chemosphere
SN - 0045-6535
ER -