Oxolinic acid photo-oxidation using immobilized TiO2

Solar photocatalitycal treatment of carbofuran at lab and pilot scale: Effect of classical parameters, evaluation of the toxicity and analysis of organic by-products

“…1, indicate a very good correlation with the kinetic model (r 2 > 0.99). The values of k LH and K L obtained were 1.1 × 10 −5 mol L −1 min −1 and 2.4 × 10 4 L mol −1 respectively, which are in accordance with previous values reported for photocatalytical degradation of organic pollutants [20,21]. In spite of the good correlation achieved, several studies are against the use of the L-H model as it is still a subject of debate [20].…”

Inhibitory effect of salinity on the photocatalytic degradation of three sulfonamide antibiotics

“…In brief, the results of the COD and DOC revealed that the treatments for increasing salinity levels by adding seawater in the test solutions significantly reduced the photocatalytic degradation, specifically the mineralization processes of the SAs. A few studies have revealed that TiO 2 /UV significantly reduced the COD and/or organic carbon in the photocatalytic degradation processes of antibiotics (Palominos et al, 2008;Giraldo et al, 2010;Dimitrakopoulou et al, 2012). However, only limited studies were concerned with the effect of salinity on the photocatalytic degradation and mineralization processes of antibiotics in water.…”

“…Kim et al (2010) reported that UV irradiation significantly increased the toxicity of another SA antibiotic, sulfathiazole, to a freshwater zooplankton, Daphnia magna. By contrast, the photodegradation intermediates of oxolinic acid, a veterinary antibiotic used in aquaculture, exhibited nonsignificant toxicity to the bacteria Escherichia coli after an oxidative reaction with TiO 2 and UV, although significant toxicity was detected in its parent compound (Palominos et al, 2008). Therefore, despite its efficiency in eliminating SAs, a cautious manipulation of TiO 2 during photocatalytic degradation is necessary in the treatment of water samples containing these SAs, to avoid potential adverse effects on organisms in receiving waters.…”

Zn-edta degradation by catechol-driven fenton reaction

“…The carbon AOS doubled in value to an AOS near (+3); where AOS (+4) corresponds to the most oxidized state of C (CO 2 ), and values of (+3) are due for example, to oxalic acid, among others. 21 This final reaction environment, rich in organic acids such as oxalic acid, could be amenable to subsequent biological treatment as previously reported. 22,23 Fenton and Fenton-like treatments normally operate in the highly acidic range.…”