Photodegradation of pharmaceutical drugs in aqueous TiO2 suspensions: Mechanism and kinetics

Photocatalytic degradation and mineralization mechanism and toxicity assessment of antivirus drug acyclovir: Experimental and theoretical studies

“…TiO 2 heterogeneous photocatalysis with highly reactive • OH has been proved to be a promising advanced oxidation technology to eliminate refractory organics in water [18,19], and the photocatalytic degradation of some model pharmaceuticals have been well studied [20,21]. The photocatalytic degradation of pharmaceuticals has mainly focused on the elimination kinetics and mechanisms of the parent compounds [22,23].…”

Photocatalytic degradation of three amantadine antiviral drugs as well as their eco-toxicity evolution

“…Numerous studies have implied that the degradation rate of various EOCs by TiO 2 heterogeneous photocatalysis followed the Langmuir-Hinshelwood (L-H) kinetics model [17,24]. When the concentration of organics were very low (mill molar), the L-H kinetic model can be simplified to an apparent-first-order equation r = k app C eq [15], where r is the reaction rate of the substrates and k app is the apparent reaction rate constant.…”

“…Among various AOPs, TiO 2 heterogeneous photocatalysis has been proved to be a promising destructive technology to decontaminate water-soluble refractory pharmaceuticals efficiently and cost-effectively [13,14], due to the process can be carried out under mild condition [15]. The possibilities as well as the mechanisms of the photocatalytic degradation of some pharmaceuticals have been reported [16,17]. However, most studies were mainly focused on the elimination of parental compounds [17][18][19], although some degradation products were identified to be more toxicity to the aquatic ecosystems and the public health [20].…”

“…The possibilities as well as the mechanisms of the photocatalytic degradation of some pharmaceuticals have been reported [16,17]. However, most studies were mainly focused on the elimination of parental compounds [17][18][19], although some degradation products were identified to be more toxicity to the aquatic ecosystems and the public health [20]. Thus, the assessments of possible adverse effects of degradation products on environment are very essential.…”

Graphite-supported TiO2 for 4-nitrophenol degradation in a photoelectrocatalytic reactor

“…In view of its toxic effects, efforts have been made to remove it from wastewater. The 4-NP photocatalytic degradation in aqueous TiO 2 suspensions has been widely studied [22][23][24]; the main reaction intermediates have been identified [25] and the possible reaction pathways have been also investigated [26]. From the observed formation of hydroxynitrobenzene isomers there is a general agreement that the major reaction pathway in the 4-NP photocatalytic degradation involves the hydroxyl radicals generated onto the catalyst surface by irradiation.…”