A new magnetic-hybrid photoreactor for photocatalytic water disinfection

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Miniatura

Data

2023-07-14

Tytuł czasopisma

ISSN czasopisma

Tytuł tomu

Wydawca

Polska Akademia Nauk

Abstrakt

In this research, the removal of model gram-negative bacteria Escherichia coli and gram-positive Staphylococcus epidermidis bacteria from aqueous solutions using copper-modified titania 0.5Cu@HomoP25, 2.0Cu @HomoP25, 5.0Cu@HomoP25 in new hybrid photoreactor assisted with rotating magnetic field (RMF) was evaluated. Therefore, the analysis of variance (ANOVA) test was employed to design the experiments and to determine the optimal conditions. The effects of various parameters such as copper concentration [% w/w], time [h] and frequency of RMF [Hz] were studied. Results: Analysis of variance (ANOVA), revealed a good agreement between experimental data and the 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 frequency of RMF removal efficiency was increased. Accordingly, the water disinfection efficiency of 100% in the regression method of the independent variables: for E. coli bacteria: c = 5 %; t = 3 h; f = 50 Hz, and for S. epidermidis c = 2.5 %; t = 1.3 h; f = 26.6 Hz were optimized. This study showed that the nonlinear regression method is a useful tool for optimizing the operating parameters for the photocatalytic disinfection process.

Opis

Słowa kluczowe

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

Cytowanie

Paszkiewicz P., Wang K., Kordas M., Rakoczy R., Kowalska E., Markowska-Szczupak A. (2023). A new magnetic-hybrid photoreactor for photocatalytic water disinfection. Chemical and Process Engineering: New Frontiers. DOI: 10.24425/cpe.2023.146724