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Title (Primary) Identification of oxidative coupling products of xylenols arising from laboratory-scale phytoremediation
Author Poerschmann, J.; Schultze-Nobre, L.; Ebert, R.U.; Górecki, T.;
Journal Chemosphere
Year 2015
Department OEC; TUCHEM; UBT;
Volume 119
Language englisch;
POF III (all) T41;
Keywords Constructed wetlands; Xylenols; Oxidative coupling reactions; Biphenyl-type coupling products; Retention index increment approach
UFZ wide themes RU3;
Abstract Oxidative coupling reactions take place during the passage of xylenols through a laboratory-scale helophyte-based constructed wetland system. Typical coupling product groups including tetramethyl-[1,1′-biphenyl] diols and tetramethyl diphenylether monools as stable organic intermediates could be identified by a combination of pre-chromatographic derivatization and GC/MS analysis. Structural assignment of individual analytes was performed by an increment system developed by Zenkevich to pre-calculate retention sequences. The most abundant analyte turned out to be 3,3′,5,5′-tetramethyl-[1,1′-biphenyl]-4,4′-diol, which can be formed by a combination of radicals based on 2,6-xylenol or by an attack of a 2,6-xylenol-based radical on 2,6-xylenol. Organic intermediates originating from oxidative coupling could also be identified in anaerobic constructed wetland systems. This finding suggested the presence of (at least partly) oxic conditions in the rhizosphere.
ID 15007
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=15007
Poerschmann, J., Schultze-Nobre, L., Ebert, R.U., Górecki, T. (2015):
Identification of oxidative coupling products of xylenols arising from laboratory-scale phytoremediation
Chemosphere 119 , 184 - 189