Photolytic Degradation of Chloramphenicol in Different Aqueous Matrices Using Artificial and Solar Radiation: Reaction Kinetics and Initial Transformation Products

Trovó, Alam G.; Paiva, Vinícius A.B.; Filho, Batuira M. da Costa; Machado, Antônio Eduardo da Hora; Oliveira, Carlos Alberto de; Santos, Renata; Daniel, Daniela

doi:10.5935/0103-5053.20140185

Cited by 7 publications

(8 citation statements)

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“…The use of AOPs for the degradation of pharmaceuticals has frequently been studied using ultrapure water and/or initial concentrations of analytes in the mg L −1 range, which are far from the concentration range and conditions found in natural waters and wastewaters [29][30][31][32][33]. Furthermore, the UVC-assisted photo-Fenton process employing iron complexation agents, at neutral pH, has not been evaluated for the treatment of hospital wastewater.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous degradation of ciprofloxacin, amoxicillin, sulfathiazole and sulfamethazine, and disinfection of hospital effluent after biological treatment via photo-Fenton process under ultraviolet germicidal irradiation

Perini

Tonetti

Vidal

et al. 2018

Applied Catalysis B: Environmental

130

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A UVC-assisted photo-Fenton process was applied to hospital wastewater that had been submitted to anaerobic treatment. Low iron (10 μM; 0.56 mg L −1) and H 2 O 2 (500 μM; 17 mg L −1) concentrations were used at the natural pH of the effluent (pH ≈ 7.4). Citric acid was employed as a complexation agent, at a 1:1 ratio, in order to maintain Fe 3+ soluble at this pH, avoiding extra procedures and costs associated with acidification/basification of the final effluent. The anaerobic process quantitatively reduced the biochemical oxygen demand (BOD 5), chemical oxygen demand (COD) and total organic carbon (TOC), with low removal of antibiotics present in the wastewater. Degradation of the antibiotics ciprofloxacin, amoxicillin, sulfathiazole, and sulfamethazine was studied by spiking the anaerobic effluent at initial concentrations of 200 μg L −1. The antibiotics were efficiently degraded (80-95%) using UVC radiation alone, although under this condition, no DOC removal was observed after 90 min. Further additions of H 2 O 2 and iron citrate increased the degradation rate constant (k obs), and 8% of DOC was removed. A lower pH resulted in higher k obs , although this was not essential for application of the photo-Fenton process. Irradiation with a germicidal lamp resulted in greater degradation of the antibiotics, compared to use of a black light lamp or sunlight, since the overall degradation was influenced by photolysis of the antibiotics, photolysis of H 2 O 2 , and the Fenton reaction. The photo-Fenton treatment could also be applied directly to the raw hospital wastewater, since no significant difference in degradation of the antibiotics was observed, compared to the anaerobic effluent. The photo-Fenton process under UVA and solar radiation reduced total coliforms and E. coli after 90 min. However, quantitative disinfection of these bacteria present in the Hospital effluent was only accomplished under UVC radiation.

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Section: Introductionmentioning

confidence: 99%

Simultaneous degradation of ciprofloxacin, amoxicillin, sulfathiazole and sulfamethazine, and disinfection of hospital effluent after biological treatment via photo-Fenton process under ultraviolet germicidal irradiation

Perini

Tonetti

Vidal

et al. 2018

Applied Catalysis B: Environmental

130

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“…Here, chloramphenicol is a widely used broad spectrum antibiotic because it has low cost and it presents excellent antibacterial properties to inhibit both Gram-positive and Gramnegative bacteria (Podzelinska et al 2010, Chen et al 2015. However, the low biodegradability of this compound in sewage treatment plants may cause serious toxic effects in humans such as severe aplastic anaemia (Kim et al 2009, Verlicchi et al 2013, Trovó et al 2014.…”

Section: Introductionmentioning

confidence: 99%

Electrolytic and electro-irradiated technologies for the removal of chloramphenicol in synthetic urine with diamond anodes

et al. 2018

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Hospital effluents are a major source for the occurrence of pharmaceuticals in the environment. In this work, the treatment of synthetic urine polluted with chloramphenicol is studied by using three different conductive-diamond electrochemical oxidation technologies: electrolysis (single electrolysis), photoelectrolysis and high-frequency ultrasound sonoelectrolysis. These technologies were evaluated at 10 and 100 mA cm. Results shows that not only chloramphenicol but also other organics contained in urine are completely mineralized by electrolysis. Ammonium is the main inorganic nitrogen species formed and it can react with the electrogenerated hypochlorite, favouring the formation of chloramines. These species prevent the potential formation of perchlorate from chlorides contained in urine at low current densities (10 mA cm) and delay its occurrence at high current densities (100 mA cm). On the other hand, irradiation of ultraviolet (UV) light or high-frequency ultrasound (US) produce changes in the performance of the electrolytic treatment, but these changes are not as important as in other cases of study shown in the literature. Nonetheless, the effect of electroirradiated technologies seems to be higher and depends on the type of pollutant when working at low current densities (10 mA cm). It is positive in the case of the degradation of the antibiotic and the uric acid and negative in the case of urea where there is a clear antagonistic effect. Production of oxidants increases with the current density although in lower ratio than expected. These results are of great importance because clearly point out that electrolytic technologies can be applied to minimize the diffuse pollution associated to pharmaceuticals before discharge into municipal sewers.

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“…Neste caso, as amostras foram coletadas a cada 20 min, acumulando-se nesse intervalo, uma dose de energia O PD1 produziu a razão m/z de 337, para a qual a fórmula de melhor ajuste foi C11H11Cl2N2O6 -(molécula desprotonada) com erro de -0,52 ppm. Esta espécie corresponde à adição de um radical hidroxila à molécula do CFC, o que é consistente com a formação de derivado monohidroxilado, como observado na literatura (GHAUCH et al, 2017;TROVO et al, 2014). Tabela 8: Parâmetros físico-químicos referentes à caracterização da água de rio (bruta), coletada na ETA Bom Jardim.…”

Section: Identificação Dos Pds Do Cfc E Avaliação Da Toxicidade Agudaunclassified

Influência das espécies de ferro e matrizes aquosas na degradação do antibiótico cloranfenicol pelo processo foto-Fenton: identificação dos produtos de transformação

Ricardo¹

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Agradeço primeiro a Deus, por ter me ajudado até aqui, pois o temor dele é o princípio da sabedoria. À minha esposa Edna Argentina Alberto, aos meus irmãos Adérito José Ricardo, Ricardo Nelito e Audência de Cádima Romão, aos meus sogros Narciso Alberto e Argentina Luís Alberto e a todos familiares pelo apoio moral para a minha formação acadêmica e, especialmente à minha esposa por acreditar em mim e por ter aceito o desafio de submeter-se a momentos de solidão durante a minha formação no Brasil. Ao meu orientador Prof. Dr. Alam Gustavo Trovó, por aceitar orientar-me, pelo apoio moral e material para a minha integração no Brasil, pela oportunidade de realização de estágio de docência e, especialmente por tudo que me ensinou de forma didática, pautando pela paciência, dedicação e incentivo. À Profa. Dra. Raquel Maria Ferreira de Souza, pela nobre colaboração na análise dos espectros de massas e identificação de produtos de transformação formados durante a degradação do cloranfenicol. Aos membros da banca de qualificação, os Professores Doutores Alex Domingues Batista e Waldomiro Borges Neto, pelas valiosas contribuições para a melhoria da qualidade técnico-científica do presente trabalho. A todos os demais professores do Instituto de Química da Universidade Federal de Uberlândia que dedicaram o seu tempo dando contribuição para a minha formação acadêmica.

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Photolytic Degradation of Chloramphenicol in Different Aqueous Matrices Using Artificial and Solar Radiation: Reaction Kinetics and Initial Transformation Products

Cited by 7 publications

References 1 publication

Simultaneous degradation of ciprofloxacin, amoxicillin, sulfathiazole and sulfamethazine, and disinfection of hospital effluent after biological treatment via photo-Fenton process under ultraviolet germicidal irradiation

Simultaneous degradation of ciprofloxacin, amoxicillin, sulfathiazole and sulfamethazine, and disinfection of hospital effluent after biological treatment via photo-Fenton process under ultraviolet germicidal irradiation

Electrolytic and electro-irradiated technologies for the removal of chloramphenicol in synthetic urine with diamond anodes

Influência das espécies de ferro e matrizes aquosas na degradação do antibiótico cloranfenicol pelo processo foto-Fenton: identificação dos produtos de transformação

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