Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1021/acs.est.6b01049
Titel (primär) Accelerated catalytic Fenton reaction with traces of iron: an Fe−Pd-multicatalysis approach
Autor Georgi, A.; Velasco Polo, M.; Crincoli, K.; Mackenzie, K. ORCID logo ; Kopinke, F.-D.
Quelle Environmental Science & Technology
Erscheinungsjahr 2016
Department TUCHEM
Band/Volume 50
Heft 11
Seite von 5882
Seite bis 5891
Sprache englisch
UFZ Querschnittsthemen RU3;
Abstract An accelerated catalytic Fenton (ACF) reaction was developed based upon a multicatalysis approach, facilitating efficient contaminant oxidation at trace levels of dissolved iron. Beside the FeII/H2O2 catalyst/oxidant pair for production of OH-radicals, the ACF system contains Pd/H2 as catalyst/reductant pair for fast reduction of FeIII back to FeII which accelerates the Fenton cycle and leads to faster contaminant degradation. By this means, the concentration of the dissolved iron catalyst can be reduced to trace levels (1 mg L–1) below common discharge limits, thus eliminating the need for iron sludge removal, which is one of the major drawbacks of conventional Fenton processes. ACF provides fast degradation of the model contaminant methyl tert-butyl ether (MTBE, C0 = 0.17 mM) with a half-life of 11 min with 1 mg L–1 dissolved iron, 500 mg L–1 H2O2, 5 mg L–1 Pd (as suspended Pd/Al2O3 catalyst) and 0.1 MPa H2, pH 3. The effects of pH, H2 partial pressure and H2O2 concentration on MTBE degradation rates were studied. Results on kinetic deuterium isotope effect and quenching studies are in conformity with OH-radicals as main oxidant. The heterogeneous Pd/Al2O3 catalyst was reused within six cycles without significant loss in activity.
dauerhafte UFZ-Verlinkung
Georgi, A., Velasco Polo, M., Crincoli, K., Mackenzie, K., Kopinke, F.-D. (2016):
Accelerated catalytic Fenton reaction with traces of iron: an Fe−Pd-multicatalysis approach
Environ. Sci. Technol. 50 (11), 5882 - 5891 10.1021/acs.est.6b01049