Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.watres.2023.120740
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. ORCID logo ; 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.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=28087
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