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Comparison of different advanced oxidation processes for the removal of amoxicillin in aqueous solution

Author:
Souza, Fernanda Siqueira, da Silva, Vanessa Vargas, Rosin, Catiusa Kuchak, Hainzenreder, Luana, Arenzon, Alexandre, Féris, Liliana Amaral
Source:
Environmental technology 2018 v.39 no.5 pp. 549-557
ISSN:
1479-487X
Subject:
acute toxicity, amoxicillin, aqueous solutions, ecotoxicology, exposure duration, fish, mineralization, organic carbon, oxidation, ozonation, ozone, photocatalysis, toxicity testing, ultraviolet radiation
Abstract:
Amoxicillin (AMX) is a widely used penicillin-type antibiotic whose presence in the environment has been investigated. In this work, the degradation of the AMX in aqueous solutions by ozonation, ozonation with UV radiation (O₃/UV), homogeneous catalytic ozonation (O₃/Fe²⁺) and homogeneous photocatalytic ozonation (O₃/Fe²⁺/UV) was investigated. The performance results have been compared in terms of removal of amoxicillin and total organic carbon (mineralization efficiency). In all processes, complete amoxicillin degradation was obtained after 5 min. However, low mineralization was achieved. For the best available process, the potential toxicity of AMX intermediates formed after ozonation was examined using a Fish Embryo Toxicity test. Results reveal that O₃ in alkaline solution and O₃/Fe²⁺/UV provide the highest mineralization rates. Ecotoxicity showed that no acute toxicity was observed during the exposure period of 96 h.
Agid:
5958581