A new magnetic-hybrid photoreactor for photocatalytic water disinfection

• Autorzy: Paszkiewicz Oliwia , Wang Kunlei , Kordas Marian , Rakoczy Rafał , Kowalska Ewa , Markowska-Szczupak Agata

Identyfikatory

DOI

10.24425/cpe.2023.146724

• Konferencja: 24th Polish Conference of Chemical and Process Engineering, 13-16 June 2023, Szczecin, Poland. Guest editor: Prof. Rafał Rakoczy and 8th European Process Intensification Conference, 31.05–2.06.2023, Warsaw, Poland
• Języki publikacji: EN

Abstrakty

EN

Environmental contamination is an urgent topic to be solved for sustainable society. Among various pollutants, microorganisms are believed to be the most dangerous and difficult to be completely inactivated. In this research, a new hybrid photoreactor assisted with rotating magnetic field (RMF) has been proposed for the efficient removal of two types of bacteria, i.e., gram-negative Escherichia coli and gram-positive Staphylococcus epidermidis. Three self-synthesized photocatalysts were used, based on commercial titanium(IV) oxide – P25, homogenized and then modified with copper by photodeposition, as follows: 0.5 Cu@HomoP25, 2.0 Cu@HomoP25 and 5.0 Cu@HomoP25 containg 0.5, 2.0 and 5.0 wt% of deposited copper, respectively. The response surface methodology (RSM) was employed to design the experiments and to deteremine the optimal conditions. The effects of various parameters such as copper concentration [% w/w], and treatment time [h] and frequency of RMF [Hz] were studied. Results: analysis of variance (ANOVA), revealed a good agreement between experimental data and proposed quadratic polynomial model (R2 = 0:86 for E. coli and R2 = 0:69 for S. epidermidis). Experimental results showed that with increasing copper concentration, time and decreasing of frequency of RMF, the removal efficiency was increased. Accordingly, the water disinfection efficiency of 100% in terms of the independent variables was optimized, including copper concentration c = 5% and 2.5% w/w, time t = 3 h and 1.3 h and frequency of rotating magnetic field f = 50 Hz and 26.6 for E.coli and S. epidermidis, respectively. This study showed that response surface methodology is a useful tool for optimizing the operating parameters for photocatalytic disinfection process.

Słowa kluczowe

EN

photocatalysis; rotating magnetic field; titanium dioxide; disinfection; water purification

PL

fotokataliza; obrotowe pole magnetyczne; dwutlenek tytanu; dezynfekcja; oczyszczanie wody

• Wydawca: Komitet Inżynierii Chemicznej i Procesowej Polskiej Akademii Nauk
• Czasopismo: Chemical and Process Engineering : New Frontiers
• Rocznik: 2023
• Tom: Vol. 44, nr 3
• Strony: art. no. e22
• Opis fizyczny: Bibliogr. 29 poz., rys., tab.

Twórcy

autor

Paszkiewicz Oliwia

• West Pomeranian University of Technology in Szczecin, Faculty of Chemical Technology and Engineering, Department of Chemical and Process Engineering, Piastow 42, 71-065 Szczecin, Poland

• https://orcid.org/0000-0002-0237-9435

autor

Wang Kunlei

• Hokkaido University, Institute for Catalysis (ICAT), N21, W9, 001-0021 Sapporo, Japan

• https://orcid.org/0000-0001-6459-2699

autor

Kordas Marian

• West Pomeranian University of Technology in Szczecin, Faculty of Chemical Technology and Engineering, Department of Chemical and Process Engineering, Piastow 42, 71-065 Szczecin, Poland

• https://orcid.org/0000-0001-9982-1658

autor

Rakoczy Rafał

• West Pomeranian University of Technology in Szczecin, Faculty of Chemical Technology and Engineering, Department of Chemical and Process Engineering, Piastow 42, 71-065 Szczecin, Poland

• https://orcid.org/0000-0002-5770-926X

autor

Kowalska Ewa

• Hokkaido University, Institute for Catalysis (ICAT), N21, W9, 001-0021 Sapporo, Japan
• Jagiellonian University, Faculty of Chemistry, Gronostajowa 2, 30-387 Krakow, Poland

• https://orcid.org/0000-0003-0955-9268

autor

Markowska-Szczupak Agata

• West Pomeranian University of Technology in Szczecin, Faculty of Chemical Technology and Engineering, Department of Chemical and Process Engineering, Piastow 42, 71-065 Szczecin, Poland

• https://orcid.org/0000-0002-3034-0263

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025)