Molecular level determination of water accommodated fraction with embryonic developmental toxicity generated by photooxidation of spilled oil

Donghwi Kim, Jee Hyun Jung, Sung Yong Ha, Joon Geon An, Ravi Shankar, Jung-Hwan Kwon, Un Hyuk Yim, Sung Hwan Kim

Research output: Contribution to journalArticle

Abstract

In this study, developmental toxicity was increased as the oil was further degraded under natural sunlight. Detailed chemical composition of the degraded oils was examined by use of gas chromatography (GC) and (−) electrospray ionization ultrahigh resolution mass spectrometry (UHR-MS). Baseline toxicities were estimated based on chemical activities of polycyclic aromatic hydrocarbons, and it was obvious that the predicted chemical activities can not explain increased toxicity alone. However, the ultrahigh resolution mass spectral abundance of polar compounds including O3 and O4 class compounds was significantly increased as the photodegradation proceeded. Further examination of double bond equivalence values of the compounds showed that polar compounds with both non-aromatic and aromatic polar structures were increased. Statistical analysis indicates that the increased toxicity can be well explained by the increased polar compounds. Therefore, the oxygenated compounds identified in this study can play an important role in toxicity of degraded oils.

Original languageEnglish
Article number124346
JournalChemosphere
Volume237
DOIs
Publication statusPublished - 2019 Dec 1

Keywords

  • Chemometrics
  • Oil spill
  • Photooxidation
  • Toxicity
  • Ultrahigh resolution mass spectrometry

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

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