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Your search keyword '"Diak, Magdalena"' showing total 13 results
Start Over Author "Diak, Magdalena" Publication Type Academic Journals
13 results on '"Diak, Magdalena"'

12. Decahedral TiO2 with exposed facets: Synthesis, properties, photoactivity and applications.

Author

Grabowska, Ewelina, Diak, Magdalena, Marchelek, Martyna, and Zaleska, Adriana

Subjects
*TITANIUM dioxide, *PHOTOCATALYSIS kinetics, *CATALYTIC oxidation, *CATALYTIC reduction, *CHEMICAL synthesis, *CHEMICAL systems
Abstract

Highlights: [•] Review of recent works on the decahedral TiO2. [•] Synthesis, properties, photoactivity and applications of decahedral TiO2. [•] Mechanism of shape evaluation of TiO2. [•] Oxidation and reduction sites on TiO2 particles. [•] Roles of TiO2 facets on the photocatalytic activity. [Copyright &y& Elsevier]

Published
2014
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13. Photocatalytic ozonation using doped TiO2 catalysts for the removal of parabens in water.

Author

Gomes, João F., Leal, Inês, Bednarczyk, Katarzyna, Gmurek, Marta, Stelmachowski, Marek, Diak, Magdalena, Emília Quinta-Ferreira, M., Costa, Raquel, Quinta-Ferreira, Rosa M., and Martins, Rui C.

Subjects
*OZONIZATION, *TITANIUM dioxide, *PARABENS, *CATALYSTS, *WASTEWATER treatment
Abstract

Conventional wastewater treatments are inefficient for the removal of parabens. The aim of this study was finding a suitable solution using ozone and UVA irradiation combined with TiO 2 catalysts doped with different noble metals (Ag, Pt, Pd, Au). Photocatalytic ozonation required lower amounts of ozone for higher efficiency on the removal of parabens, chemical oxygen demand (COD) and total organic carbon (TOC). The best catalyst for the initial contaminants degradation was 0.5% Ag-TiO 2 leading to total parabens removal using 46 mgO 3 /L. Due to the relative low mineralization achieved, the toxicity of the treated solutions was still compared with the initial one over several species ( Vibrio fischeri , Lepidium sativum and Corbicula fluminea ). All the treatments applied led to a clear decrease on the toxicity compared with initial mixture of parabens. From an economical point of view, it was concluded that the presence of UVA irradiation increased the energy consumption compared with catalytic ozonation with these catalysts but it can decrease the time of reaction. From the by-products analysis, it was concluded that hydroxylation appears to be the most significant reaction pathway and the main responsible for parabens degradation. [ABSTRACT FROM AUTHOR]

Published
2017
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