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LAPSE:2023.5671

Design of Polymer-Embedded Heterogeneous Fenton Catalysts for the Conversion of Organic Trace Compounds

Christoph Horn, Stephanie Ihmann, Felix Müller, Doris Pospiech, Konstantin B. L. Borchert, Rolf Hommel, Kaite Qin, Kai Licha, Peter J. Allertz, Marco Drache

February 23, 2023

Abstract
Advanced oxidation processes are the main way to remove persistent organic trace compounds from water. For these processes, heterogeneous Fenton catalysts with low iron leaching and high catalytic activity are required. Here, the preparation of such catalysts consisting of silica-supported iron oxide (Fe2O3/SiOx) embedded in thermoplastic polymers is presented. The iron oxide catalysts are prepared by a facile sol−gel procedure followed by thermal annealing (calcination). These materials are mixed in a melt compounding process with modified polypropylenes to stabilize the Fe2O3 catalytic centers and to further reduce the iron leaching. The catalytic activity of the composites is analyzed by means of the Reactive Black 5 (RB5) assay, as well as by the conversion of phenol which is used as an example of an organic trace compound. It is demonstrated that embedding of silica-supported iron oxide in modified polypropylene turns the reaction order from pseudo-first order (found for Fe2O3/SiOx catalysts), which represents a mainly homogeneous Fenton reaction, to pseudo-zeroth order in the polymer composites, indicating a mainly heterogeneous, surface-diffusion-controlled process.

Record ID

LAPSE:2023.5671

Keywords

degradation, Fenton process, heterogeneous Fenton, iron oxide, phenol degradation, polymer composite, Reactive Black 5, sol–gel, trace organic compound

Subject

Process Design

Suggested Citation

Horn C, Ihmann S, Müller F, Pospiech D, Borchert KBL, Hommel R, Qin K, Licha K, Allertz PJ, Drache M. Design of Polymer-Embedded Heterogeneous Fenton Catalysts for the Conversion of Organic Trace Compounds. (2023). LAPSE:2023.5671

Author Affiliations

Horn C: Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany; Organic Chemistry of Polymers, Technische Universität Dresden, 01069 Dresden, Germany
Ihmann S: Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany; Organic Chemistry of Polymers, Technische Universität Dresden, 01069 Dresden, Germany
Müller F: Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany
Pospiech D: Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany [ORCID]
Borchert KBL: Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany; Physical Chemistry of Polymeric Materials, Technische Universität Dresden, 01069 Dresden, Germany [ORCID]
Hommel R: IFN Forschungs-und Technologiezentrum GmbH, Dr.-Bergius-Str. 19, 06729 Tröglitz-Elsteraue, Germany
Qin K: IFN Forschungs-und Technologiezentrum GmbH, Dr.-Bergius-Str. 19, 06729 Tröglitz-Elsteraue, Germany
Licha K: FEW Chemicals GmbH, Technikumstr. 1, 06766 Bitterfeld-Wolfen, Germany
Allertz PJ: Faculty of Natural Science, Brandenburg University of Technology, Universitätsplatz 1, 01968 Senftenberg, Germany
Drache M: Institut für Technische Chemie, Technische Universität Clausthal, Arnold-Sommerfeld-Str. 4, 38678 Clausthal-Zellerfeld, Germany [ORCID]

Journal Name

Processes

Volume

Issue

First Page

942

Year

2021

Publication Date

2021-05-26

DOI:

https://doi.org/10.3390/pr9060942