Continuous ozonation treatment of ofloxacin: transformation products, water matrix effect and aquatic toxicity

Journal of Hazardous Materials
Jose B CarbajoJose A Perdigón-Melón

Abstract

The continuous ozonation of the antibiotic ofloxacin (OFX) has been performed using a synthetic water matrix and in a sewage treatment plant (STP) effluent. The aim was to study the effect of the water matrix on the ozonation with particular emphasis on the aquatic toxicity of treated water. OFX was completely removed in both water matrices, although the amount of ozone consumed for its depletion was strongly matrix-dependent. The extent of mineralization was limited and a number of intermediate transformation products (TPs) appeared, twelve of which could be identified. OFX reaction pathway includes the degradation of piperazinyl and quinolone moieties. The further oxidation of TPs gave rise to the formation and accumulation of carboxylic acids, aldehydes, nitrogen-containing organic compounds and inorganic ions. Aquatic toxicity of treated mixtures was assessed using four standard species: the bacteria Vibrio fischeri and Pseudomonas putida as target organisms and the algae Pseudokirchneriella subcapitata and the protozoan Tetrahymena thermophila as non-target organisms. OFX was toxic for the bacteria and the microalgae at the spiked concentration in untreated water. However, the continuous ozonation at the upper operational ...Continue Reading

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Citations

May 29, 2016·Journal of Hazardous Materials·Yue ZhaoGang Yu
Aug 24, 2016·Journal of Environmental Management·Jianlong Wang, Shizong Wang
Mar 10, 2019·Scientific Reports·Chaitanya SarangapaniPaula Bourke
Nov 27, 2018·Journal of Hazardous Materials·Eleni MilaNikolaos S Thomaidis
Nov 22, 2019·European Journal of Pharmacology·Ewa FelisEwa Korzeniewska
Feb 2, 2021·Water Environment Research : a Research Publication of the Water Environment Federation·Shengkai XuBensheng Su
Jul 20, 2021·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Marlon CaianeloJosé Roberto Guimarães
Aug 5, 2021·Environmental Science and Pollution Research International·Ana Rita CarvalhoCláudia Maria Rosa Ribeiro
Sep 4, 2021·Environmental Pollution·Carolina Rodrigues Dos SantosMíriam Cristina Santos Amaral

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