Photocatalytic decomposition of selected estrogens and their estrogenic activity by UV-LED irradiated TiO2 immobilized on porous titanium sheets via thermal-chemical oxidation

Photocatalytic Degradation of Microcystins by TiO2 Using UV-LED Controlled Periodic Illumination

“…The influence of these interactions is reflected in the relative degradation rates under continuous UV illumination, where MC-LR and MC-RR have degradations rates less than half that of MC-LA. These results are consistent with previous studies by Arlos et al and Liang et al, which showed that electrostatic forces between the pollutant and catalyst have a significant influence on the degradation rate [16,25]. The influence of electrostatic forces demonstrates the importance of considering the pH and the charge of target pollutants when treating water [26].…”

“…The PTT membrane characterization results have been described in previous works [16,17]. In summary, Raman spectra and XRD indicated mainly anatase TiO 2 , with some rutile TiO 2 and titanium.…”

“…PTT membrane synthesis and characterization methods are described in previous works [16,17]. In short, PTi membranes were cut into 5-cm diameter discs, cleaned and oxidized in a hydrogen peroxide solution at 80 • C, and then calcined at 600 • C. Material characterization methods included micro-Raman spectroscopy (He-Ne laser λ = 632.8 nm, Renishaw, Wotton-under-Edge, UK), scanning electron microscopy (FE-SEM LEO 1550, Carl Zeiss Microscopy, Jena, Germany), and X-ray diffraction (XPERT-PRO, Malvern Panalytical, Malvern, UK).…”

“…Many studies of UV/TiO 2 photocatalysis use methanol as a carrier solvent when preparing aqueous pollutant solutions [10,16,17,[29][30][31][32][33][34][35]. More recent studies show that methanol has a significant effect on photocatalytic degradation because it acts as a hydroxyl radical scavenger, even at low concentrations [36,37].…”

“…The experimental method is derived from previous work [16]. In brief, a solution of 5 mM TPA was made in 6 mM NaOH.…”