Oxidation of antibiotics by ferrate(VI) in water: Evaluation of their removal efficiency and toxicity changes

0547319 - BÚ 2022 RIV GB eng J - Journal Article
Kovaláková, Pavla - Cizmas, L. - Feng, M. - McDonald, T. J. - Maršálek, Blahoslav - Sharma, V. K.
Oxidation of antibiotics by ferrate(VI) in water: Evaluation of their removal efficiency and toxicity changes.
Chemosphere. Roč. 277, AUG 2021 (2021), č. článku 130365. ISSN 0045-6535. E-ISSN 1879-1298
R&D Projects: GA TA ČR SS01020006
Institutional support: RVO:67985939
Keywords : ecotoxicity * algae * cyanobacteria * antibiotics * ferrate
OECD category: Ecology
Impact factor: 8.943, year: 2021
Method of publishing: Open access with time embargo
https://doi.org/10.1016/j.chemosphere.2021.130365

Antibiotics in water and wastewater have been determined extensively. The treatment of antibiotics in water needs evaluation of possible harmful effects on aquatic ecosystems and human health. This paper presents the toxicity evaluation of antibiotics after their treatment with ferrate (VI) ((FeO42-)-O-VI, Fe(VI)) in water. The antibiotics (sulfamethoxazole (SMX), erythromycin (ERY), ofloxacin (OFL), ciprofloxacin (CIP), tetracycline (TET), oxytetracycline (OXY), and trimethoprim (TMP)) were treated at pH 8.0 by applying two concentrations of Fe(VI) to have molar ratios of 5:1 and 10:1 ([Fe(VI)]:[antibiotic]). Under the studied conditions, incomplete removal of antibiotics was observed, suggesting that the treated solutions contained parent antibiotics and their transformation products. The toxicity of antibiotics without Fe(VI) treatment was tested against freshwater green alga Raphidocelis subcapitata and cyanobacterium Synechococcus elongatus, which were determined to be generally sensitive to antibiotics, with EC50 < 1.0 mg/L. The toxicity of Fe(VI) treated solution was tested against R. subcapitata. Results found no toxicity for the treated solutions of OFL, CIP, and OXY. However, SMX, ERY, and TET remained toxic after Fe(VI) treatment (i.e., more than 75% growth inhibition of R. subcapitata). Results demonstrated that R. subcapitata may be applied to test the toxicity of antibiotics after oxidative treatments.
Permanent Link: http://hdl.handle.net/11104/0325108