Aqueous photocatalytic degradation of selected micropollutants by Pd-modified titanium dioxide in three photoreactor types.
The goals of the present study were to synthesise highly efficient Pd-TiO2 photocatalyst, to characterise its performance in slurry in smaller scale and to investigate its performance in the aqueous photocatalytic oxidation of three antibiotics: doxycycline, sulphamethizole and amoxicillin. The performance of the photocatalyst was evaluated in an open batch slurry reactor equipped with a fluorescent long-wavelength ultraviolet (UVA) lamp (0.2 L). With the fastest degrading doxycycline, experimental research was continued in a fixed-bed continuous flow photoreactor (0.13 L), with the Pd-TiO2 photocatalyst attached to a glass plate, and a medium laboratory-scale three-phase fluidised-bed reactor (2 L) equipped with four fluorescent UVA lamps, with the photocatalyst attached to the surface of expanded clay granules employed as the bed material. While showing very high activity in the batch slurry reactor, far surpassing P25 Aeroxide, the performance of Pd-TiO2 with doxycycline was comparable to P25 in the semi-continuous reactors.
['Klauson|Deniss|D|', 'Šakarašvili|Marko|M|', 'Pronina|Natalja|N|', 'Krichevskaya|Marina|M|', 'Kärber|Erki|E|', 'Mikli|Valdek|V|']
D000658:Amoxicillin D002384:Catalysis D004318:Doxycycline D010777:Photochemistry D013419:Sulfamethizole D014025:Titanium D014466:Ultraviolet Rays D014865:Waste Disposal, Fluid
photoreactor fluidised-bed reactor Tetracyclines penicillins sulphonamides