Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-38758 Zeitschriftenartikel Nadejde, C.; Neamtu, M.; Hodoroaba, Vasile-Dan; Schneider, Rudolf; Paul, Andrea; Ababei, G.; Panne, Ulrich Tannic acid- and natural organic matter-coated magnetite as green Fenton-like catalysts for the removal of water pollutants The use of magnetic materials as heterogeneous catalysts has attracted increasing attention in the last years since they proved to be promising candidates for water treatment. In the present study, two types of surface-modified magnetite (Fe3O4) nanoparticles, coated with non-hazardous naturally occurring agents—either tannic acid (TA) or dissolved natural organic matter—were evaluated as magnetic heterogeneous catalysts. Chemical synthesis (co-precipitation) was chosen to yield the nanocatalysts due to its well-established simplicity and efficiency. Subsequently, the properties of the final products were fully assessed by various characterization techniques. The catalytic activity in heterogeneous oxidation of aqueous solutions containing a model pollutant, Bisphenol A (BPA), was comparatively studied. The effect of operational parameters (catalyst loading, H2O2 dosage, and UV light irradiation) on the Degradation performance of the oxidation process was investigated. The optimum experimental parameters were found to be 1.0 g/L of catalysts and 10 mM H2O2, under UV irradiation. The highest mineralization rates were observed for Fe3O4-TA catalyst. More than 80 % of BPA was removed after 30 min of reaction time under the specified experimental conditions. The obtained results showed that the two catalysts studied here are suitable candidates for the removal of pollutants in wastewaters by means of heterogeneous reaction using a green sustainable treatment method. Springer 2015 Journal of Nanoparticle Research 17 12 476 (1) 476 (10) 10.1007/s11051-015-3290-0 2016-12-21 OPUS4-40074 Beitrag zu einem Tagungsband Nadejde, C.; Neamtu, Mariana; Hodoroaba, Vasile-Dan; Schneider, Rudolf; Paul, Andrea; Ababei, G.; Panne, Ulrich Green Fenton-like catalysts for the removal of water pollutants Two types of surface modified magnetite (Fe3O4) nanoparticles, coated with either tannic acid (TA) or dissolved natural organic matter (NOM), were evaluated as magnetic heterogeneous catalysts. Simple and efficient procedures for the synthesis of the magnetic catalysts were employed, their properties being fully assessed by various characterization techniques. The catalytic activity in heterogeneous oxidation of aqueous solutions containing Bisphenol A (BPA) over the catalysts was comparatively studied. The optimum experimental parameters were: 1g/L of catalysts, 10 mM H2O2, under UV irradiation. The highest mineralization rates were observed for Fe3O4-TA catalyst. More than 80% of BPA were removed after 30 minutes of reaction time under the specified experimental conditions. The results showed that the obtained catalysts are suitable candidates for the removal of pollutants in wastewaters by means of heterogeneous reaction CRC Press, Taylor&Francis Group 2015 Materials for Energy, Efficiency and Sustainability 2 978-1- 4987-4733-2 TechConnect World Innovation Conference Nanotech 2015 Washington, DC, Maryland, USA 14.06.2015 17.06.2015 87 90 2017-05-05 OPUS4-40082 Beitrag zu einem Tagungsband Nadejde, C.; Neamtu, Mariana; Hodoroaba, Vasile-Dan; Schneider, Rudolf; Ababei, G.; Panne, Ulrich Characterization and application of Green Fenton-like catalysts for the removal of water pollutants Three types of magnetite-chitosan/iron oxalate/iron citrate nanoparticles (NP) were evaluated as magnetic heterogeneous catalysts for water treatment. Proteomass 2015 PTIM 2015 Book of Proceedings 978-989-99361-6-4 PTIM 2015, 1st International Caparica Conference on Pollutant Toxic Ions and Molecules Caparica, Portugal 02.112015 04.11.2015 186 187 2017-05-08