<abstract xmlns="http://www.w3.org/1999/xhtml">

A novel photocatalytic process using a modification of photo-Fenton reaction, with sodium percarbonate (SP), as an alternative source of H2O2, and alloy Al65Cu20Fe15 containing, among others, quasicrystals (of the percentage composition Al65Cu20Fe15), being a source of iron ions, effectively decolourizes the aqueous solution of rhodamine B (RB; solution of 5 mg/l). The source of UV radiation was a lamp with a power of 36 W. The experiments were carried out at pH = 7 and reaction time (from 5 to 60 min). The increase in SP concentration (in the range of 8.3 to 33.3 g/l) significantly increased the degree of degradation of RB and the reaction rate. However, the use of quasicrystals, in the range of 8.3 to 33.3 g/l, was also important in the modified photocatalytic photo-Fenton process. The best degradation effects of RB (95%) were obtained for the highest SP concentration of 33.3 g/l and the lowest quasicrystal concentration of 8.3 g/l. On the other hand, visual decolourization of RB was obtained with an efficiency of 70% for SP and quasicrystal concentrations of 16.7 g/l and 16.7 g/l, respectively, after 45 minutes, and for SP and quasicrystal concentrations of 33.3 g/l and 8.3 g/l, respectively, after the time of 20 minutes. The best RB degradation effects in the comparative method (UV/Na2CO3·1.5H2O2 without the addition of quasicrystals) were only 52.7%. The obtained results encourage further research to optimize the conditions of the proposed method and to investigate its applicability to other types of dyes and pollutants.
</abstract>

A novel photocatalytic process using a modification of photo-Fenton reaction, with sodium percarbonate (SP), as an alternative source of H2O2, and alloy Al65Cu20Fe15 containing, among others, quasicrystals (of the percentage composition Al65Cu20Fe15), being a source of iron ions, effectively decolourizes the aqueous solution of rhodamine B (RB; solution of 5 mg/l). The source of UV radiation was a lamp with a power of 36 W. The experiments were carried out at pH = 7 and reaction time (from 5 to 60 min). The increase in SP concentration (in the range of 8.3 to 33.3 g/l) significantly increased the degree of degradation of RB and the reaction rate. However, the use of quasicrystals, in the range of 8.3 to 33.3 g/l, was also important in the modified photocatalytic photo-Fenton process. The best degradation effects of RB (95%) were obtained for the highest SP concentration of 33.3 g/l and the lowest quasicrystal concentration of 8.3 g/l. On the other hand, visual decolourization of RB was obtained with an efficiency of 70% for SP and quasicrystal concentrations of 16.7 g/l and 16.7 g/l, respectively, after 45 minutes, and for SP and quasicrystal concentrations of 33.3 g/l and 8.3 g/l, respectively, after the time of 20 minutes. The best RB degradation effects in the comparative method (UV/Na2CO3·1.5H2O2 without the addition of quasicrystals) were only 52.7%. The obtained results encourage further research to optimize the conditions of the proposed method and to investigate its applicability to other types of dyes and pollutants.

Photocatalytic Decolourization of Rhodamine B by Modified Photo-Fenton Process with Quasicrystals – Preliminary Research

Department of Water and Wastewater Engineering

PhD School, Silesian University of Technology

Department of Engineering Materials and Biomaterials

Architecture, Civil Engineering, Environment

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

A novel photocatalytic process using a modification of photo-Fenton reaction, with sodium percarbonate (SP), as an alternative source of H2O2, and alloy...

Quasicrystals concentration 8.3 g/l				Sodium percarbonate concentration 16.7 g/l
SP concentration (g/l)	8.3	16.7	33.3	Quasicrystals concentration (g/l)	0.0	8.3	16.7	33.3
Reaction order	I	I	I	Reaction order	I	I	I	I
Reaction rate constant	0.017	0.032	0.048	Reaction rate constant	0.012	0.032	0.026	0.031
Unit	s⁻¹	s⁻¹	s⁻¹	Unit	s⁻¹	s⁻¹	s⁻¹	s⁻¹

Photocatalytic Decolourization of Rhodamine B by Modified Photo-Fenton Process with Quasicrystals – Preliminary Research

Pubblicato online: 20 lug 2023

Pagine: 171 - 176

Ricevuto: 15 mag 2023

Accettato: 28 mag 2023

DOI: https://doi.org/10.2478/acee-2023-0026

Parole chiave
Advanced oxidation processes, Quasicrystals, Rhodamine B, Decolourization, Modified photo-Fenton

© 2023 Sylwester Łoński et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Figure 2.

Figure 3.

Reaction rate constant

Photocatalytic Decolourization of Rhodamine B by Modified Photo-Fenton Process with Quasicrystals – Preliminary Research

Pubblicato online: 20 lug 2023

Pagine: 171 - 176

Ricevuto: 15 mag 2023

Accettato: 28 mag 2023

DOI: https://doi.org/10.2478/acee-2023-0026

Parole chiaveAdvanced oxidation processes, Quasicrystals, Rhodamine B, Decolourization, Modified photo-Fenton

© 2023 Sylwester Łoński et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Figure 2.

Figure 3.

Reaction rate constant

Parole chiave
Advanced oxidation processes, Quasicrystals, Rhodamine B, Decolourization, Modified photo-Fenton