Photocatalytic degradation of 17α‐ethynylestradiol in environmental samples by ZnO under simulated solar radiation

Abstract

BACKGROUND: Recently, the fate of emerging micro-contaminants in environmentally relevant samples has attracted considerable attention. Semiconductor photocatalysis may offer an appealing methodology to treat such contaminants; in this respect, the degradation of synthetic estrogen 17α-ethynylestradiol (EE2) employing simulated solar radiation and ZnO as the photocatalyst was investigated.

Solar photocatalytic decomposition of ethyl paraben in zinc oxide suspensions

“…The rest four TPs, methyl paraben (MP), 4-hydroxybenzoic acid (4-HBA), 2,4-dihydroxybenzoic acid (2,4-DHB) and 3,4-dihydroxybenzoic acid (3, were identified via the comparison of the authentic reference standards, on the basis of the retention times and accurate mass of pseudo-molecular ions in their MS spectra. Based on their formation/disappearance profiles, they can be characterized as secondary stage TPs as their maximum concentration is achieved at a delayed time (i.e.…”

“…This said, other semiconductors have also been tested for photocatalytic water remediation; of these, ZnO, whose band gap energy and photocatalytic mechanism are similar to that of TiO 2 [3], exhibits most of titania's beneficial features possibly with the exception of stability due to photo-corrosion [4]. In several cases, ZnO has shown comparable or even better performance than TiO 2 for the degradation of various contaminants [5][6][7][8][9][10].…”

Hydrothermal synthesis, characterization of visible‐light‐driven α‐Bi2O3 enhanced by Pr3+ doping

“…In general, hydroxyl radical (·OH) is known as a key active species in the photocatalytic process . Its oxidative ability is high enough to attack most toxic organic contaminants.…”

Photocatalytic oxidation of 17 -Ethinylestradiol by UV-activated TiO2 in batch and continuous-flow reactor

“…(Table 1). The upper and lower levels of these parameters were based on the results (Frontistis et al, 2012;Yargeau et al, 2012). The combination that presented the best results in terms of EE2 removal was applied to stage 2 in which the reactor was operated in continuous-flow mode.…”