Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1016/j.watres.2023.120740 |
| Document | accepted manuscript |
| Title (Primary) | Carbon and hydrogen isotope fractionation of phthalates during photocatalysis reactions in aqueous solution containing Fe(III) complexes or iron minerals |
| Author | Min, N.; Yao, J.; Zhu, J.; Kümmel, S.
; Lechtenfeld, O.J.
; Schaefer, T.; Herrmann, H.; Richnow, H.H. |
| Source Titel | Water Research |
| Year | 2023 |
| Department | ISOBIO; ANA |
| Volume | 247 |
| Page From | art. 120740 |
| Language | englisch |
| Topic | T7 Bioeconomy T9 Healthy Planet |
| Abstract | The hydrogen and carbon isotope fractionation factor (ε2H, ε13C) of dimethyl-, diethyl- and dibutyl phthalic acid ester during photosensitized degradation by artificial sunlight with Fe(III) ions and iron minerals (hematite, goethite and magnetite) in aqueous solution were examined by compound-specific isotope analysis (CSIA) in order to analyse the degradation mechanism. Hematite does not catalyze photosensitized degradation of phthalates. The correlation of 2H and 13C isotope fractionation (Λ = Δδ2H/Δδ13C) of phthalates with increasing chain length (dimethyl-; diethyl-; and dibutyl-) were compared with values of the ∙OH radical model reaction with the aromatic ring as well as acidic and alkaline hydrolysis. The Λ values of die photosensitized reaction of diethyl phthalate with goethite (-5.1 ± 1.8) and magnetite (-18.9 ± 3.9) show a large difference compared to Fe(III) solutions (4.7 ± 0.9 to 4.8 ± 1.0) suggesting specific reaction mechanisms. The fractionation factors determined here have potential to characterize the degradation of phthalates catalyzed by photo-induced reaction of Fe(III), goethite and magnetite in natural system and in remediation approaches. |
| Min, N., Yao, J., Zhu, J., Kümmel, S., Lechtenfeld, O.J., Schaefer, T., Herrmann, H., Richnow, H.H. (2023): Carbon and hydrogen isotope fractionation of phthalates during photocatalysis reactions in aqueous solution containing Fe(III) complexes or iron minerals Water Res. 247 , art. 120740 10.1016/j.watres.2023.120740 |
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