Degradation of ciprofloxacin using Fenton's oxidation: Effect of operating parameters, identification of oxidized by-products and toxicity assessment

Biochar-Supported FeS/Fe3O4 Composite for Catalyzed Fenton-Type Degradation of Ciprofloxacin

“…Its attenuation and disappearance after a reaction of 30 min indicates the breakdown of quinoline structure. No other strong absorbance peaks, except the emerging one at 225 nm, were observed in the solution samples after this reaction of 30 min, implying almost complete transformation of ciprofloxacin into intermediates ( Figure S3) such as short-chain acids and CO 2 , according to the previous research reports [37,38,46].…”

“…Furthermore, the optimum molar H2O2/ciprofloxacin ratio for removal of ciprofloxacin was in the range of 33.3 to 66.7 (and the dosage of H2O2 was 2 to 4 mmol/L), according to the results shown in Figure 9b. This range is 0.71 to 1.42 times the stoichiometric ratio for total mineralization of ciprofloxacin by Fenton's oxidation, which is 47 according to a previous study [46]. Fewer H2O2 would limit the amount of • OH produced, while excess H2O2 dosage is unfavorable (Figure 9b), because the excess H2O2 would react with • OH (Eq.…”

Monitoring photolysis and (solar photo)-Fenton of enrofloxacin by a methodology involving EEM-PARAFAC and bioassays: Role of pH and water matrix

“…The photo-Fenton process consists in an enhancement of the Fenton reaction upon irradiation with UV or visible light, and hence sunlight can be employed with the economic and ecological advantages that they involve (Malato et al, 2009). Some examples are available in literature on the treatment of FQs by Fenton (Gupta and Garg, 2018;Villegas-Guzman et al, 2017) and photo-Fenton (Michael et al, 2013;Villegas-Guzman et al, 2017).…”

“…On the other hand, exploring the performance of FQs degradation at mild pHs becomes of paramount relevance in real-case scenarios (Santos-Juanes et al, 2017). In addition to this, complete mineralization of FQs is a challenging goal to be reached (Gupta and Garg, 2018), since reaction by-products remain in the system, and their nature has to be unveiled and their biocompatibility assessed.…”

Efficacy of Different Waste and By-Products from Forest and Food Industries in the Removal/Retention of the Antibiotic Cefuroxime

“…These antimicrobials are poorly absorbed by the intestine and a significant proportion (up to 90%) are excreted through feces and urine as the parent Processes 2021, 9, 1151 2 of 12 compound [12][13][14], being incorporated into wastewater in the case of humans, and passing to slurry pits or directly into the environment in the case of farm animals. These wastewaters reach treatment plants, but many of these facilities have not been designed to eliminate antibiotics [14,15], removing between 20 and 90% of the pollutants, either through its accumulation in sewage sludge [16], or by degradation processes, which affect antibiotics such as penicillin [17]. However, other antimicrobials such as cephalosporins, fluoroquinolones, and tetracyclines are more resistant to natural degradation [17,18].…”