Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1016/j.apcatb.2020.119100
Volltext Akzeptiertes Manuskript
Titel (primär) Hydrodechlorination of hexachlorobenzene in a miniaturized nano-Pd(0) reaction system combined with the simultaneous extraction of all dechlorination products
Autor Wiltschka, K.; Neumann, L.; Werheid, M.; Bunge, M.; Düring, R.A.; Mackenzie, K. ORCID logo ; Böhm, L.
Quelle Applied Catalysis B-Environmental
Erscheinungsjahr 2020
Department TUCHEM
Band/Volume 275
Seite von art. 119100
Sprache englisch
Keywords chlorobenzenes transformation products palladium (Pd) nanoparticles specific catalytic activity solid-phase microextraction (SPME)
Abstract The persistent organic pollutant hexachlorobenzene and all 11 further chlorobenzenes were hydrodechlorinated at environmentally relevant concentrations in miniaturized reaction systems, catalyzed by low concentrated Pd(0)-nanoparticles, to examine differences in dechlorination rates and pathways. Using solid-phase microextraction coupled to gas chromatography-mass spectrometry allowed the simultaneous extraction and detection of reactants, intermediate products and fully dechlorinated benzene, regardless of their different physicochemical properties. Dechlorination of HCB with formation of intermediates mainly proceeded via pentachlorobenzene, 1,2,3,4-tetrachlorobenzene, 1,2,3-trichlorobenzene, 1,2-dichlorobenzene, and monochlorobenzene to benzene. Specific catalytic activities of Pd(0)-nanoparticles (100–3400 L g-1 min-1) differed depending on chlorination degree of chlorobenzenes and position of chlorine atoms. An inductive effect is assumed to favor a removal of the vicinal chlorine atom. The presented method permits the facile determination and comparison of nanomaterials’ specific catalytic activities and allows the elucidation of dehalogenation pathways. It further enables to specifically examine formed intermediates to assess their toxicity and biodegradability.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=23136
Wiltschka, K., Neumann, L., Werheid, M., Bunge, M., Düring, R.A., Mackenzie, K., Böhm, L. (2020):
Hydrodechlorination of hexachlorobenzene in a miniaturized nano-Pd(0) reaction system combined with the simultaneous extraction of all dechlorination products
Appl. Catal. B-Environ. 275 , art. 119100 10.1016/j.apcatb.2020.119100