Carbon isotope fractionation during degradation of benzene, trichloroethene, and tetrachloroethene under ultraviolet light

Simon R. Poulson, Hiroshi Naraoka

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Abstract

Stable carbon isotope fractionation factors associated with the degradation of benzene, trichloroethene (TCE), and tetrachloroethene (PCE) under ultraviolet light (254 nm) have been measured experimentally using simple and inexpensive quartz reaction vessels equipped with a syringe valve and septum. Carbon isotope enrichment factors of εbenzene = -6.2 ±0.3‰, εTCE = -6.8 ± 0.2‰, and εPCE =-4.1 ± 0.2‰ were obtained. The results demonstrate that the simple and inexpensive experimental design used in this study has potential application to determine isotope enrichment factors associated with degradation under conditions more representative of important atmospheric processes, and hence has future application to the study of the behavior of important trace gases such as non-methane hydrocarbons and other volatile organic compounds in the atmosphere.

Original languageEnglish
Pages (from-to)291-296
Number of pages6
JournalGEOCHEMICAL JOURNAL
Volume40
Issue number3
DOIs
Publication statusPublished - Aug 11 2006
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

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