Carbon and Hydrogen Isotope Fractionation of Benzene, Toluene, and o -Xylene during Chemical Oxidation by Persulfate
| Autor: | Daniel Bouchard, Ramon Aravena, Felipe Solano, Neil R. Thomson, Massimo Marchesi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Hydrogen
0208 environmental biotechnology Inorganic chemistry chemistry.chemical_element o-Xylene 02 engineering and technology Fractionation 010501 environmental sciences Biodegradation Persulfate 01 natural sciences Toluene 020801 environmental engineering chemistry.chemical_compound chemistry Benzene Carbon 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering |
| Popis: | Experiments were performed to investigate the carbon and hydrogen isotope fractionation of benzene, toluene, and o-xylene (BTX) during chemical oxidation by unactivated persulfate at two concentrations (8 and 20 g/L). Carbon enrichment (ϵC) values of −1.7 ± 0.1‰ for benzene, −0.64 ± 0.1‰ for toluene and −0.36 ± 0.04‰ for o-xylene were obtained. No significant hydrogen enrichment (ϵH) was observed for benzene, while the hydrogen enrichment for toluene and o-xylene were −20 ± 3‰ and −23 ± 2‰, respectively. The dual isotope plot (Δδ13C vs. Δδ2H) for benzene and o-xylene revealed a distinct fractionation trend compared to the majority of the biodegradation data compiled from the literature; however, no unique trend was observed for toluene. The significant carbon and/or hydrogen enrichment, and the distinct trend observed on the dual isotope plot suggest that compound specific isotope analysis (CSIA) can potentially be used to monitor the chemical oxidation of BTX by persulfate, and to distinguish treatment areas where persulfate or biodegradation reactions are occurring for benzene and o-xylene. |
| Databáze: | OpenAIRE |
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