NATHALIA FONSECA BOIANI

NATHALIA FONSECA BOIANI

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Toxicidade aguda e avaliação de riscos ecológicos de fármacos pertencentes a diferentes classes detectados em ambientes aquáticos
2021 - TOMINAGA, F.K.; BOIANI, N.F.; GARCIA, V.S.G.; SILVA, T.T.; LEO, P.; BORRELY, S.I.
Avaliação da toxicidade da mistura de fármacos submetidos a irradiação por feixe de elétrons
2021 - BOIANI, N.F.; SILVA, T.T.; TOMINAGA, F.K.; GARCIA, V.S.G.; BORRELY, S.I.
Gas chromatography-mass spectrometry analysis of irradiated fluoxetine aqueous samples
2021 - REDÍGOLO, MARCELO M.; CALVO, WILSON A.P.; BOIANI, NATHALIA F.; TOMINAGA, FLAVIO K.; BORRELY, SUELI I.
The last decade witnessed the drastic increase in the use of antidepressant drugs, being fluoxetine the most prescribed worldwide. Conventional wastewater treatment is inefficient in removing fluoxetine and its accumulation in water bodies and water living organism is inevitable. Among several methods for contaminant removal from wastewater, electron beam irradiation is an efficient and green technology. This work presents the characterization of aqueous fluoxetine samples before and after irradiation. Gas chromatography coupled to mass spectrometry was used to identify the original compound and its irradiation products. Results indicate a drastic reduction in fluoxetine presence after the irradiation process. Radiolysis pathways were proposed based on mass fragments identification.
Toxicity removal of pharmaceuticals mixtures through electron beam irradiation
2021 - BOIANI, N.F.; TOMINAGA, F.K.; BORRELY, S.I.
Toxicity of textile effluents treated by electron beam technology
2019 - GARCIA, VANESSA S.G.; BOIANI, NATHALIA F.; ROSA, JORGE M; BORRELY, SUELI I.
The textile industry uses expressive amount of water during the production and generate effluents that contain residuals of dyes, surfactants, peroxides, acids and salts, and toxicity. In addition, the textile effluents are commonly colored, because the dyes used in fibers dyeing usually have low fixation and high solubility. Many of the mentioned products are not easily removed, requiring additional treatment steps. Advanced Oxidative Processes, such as electron beam irradiantion (EBI), can be a good alternative to reduction of organic pollutants from effluents. Therefore, studies on these contaminants in aquatic environment are important for assessing their impacts on ecosystems and water quality. The objective of this study was to evaluate the toxicity of textile effluents treated with EBI. The doses of 2.5 kGy and 5.0 kGy were used. The toxicity assays were performed with Daphnia similis organisms, exposed to samples during 48 hours, and the results expressed by EC50 (median effective concentration). For the textile effluent, EC 50% values ranged from: 2.95 ±0.13 (raw effluent) until 20.90 ±1.48 (irradiated effluent, at 5kGy). The EBI treatment was effective for toxicity reduction, with efficiency higher than 60% (2.5 kGy) and 80% (5.0 kGy). The study of organic and inorganic contaminants, presents in these effluents, demonstred EC 50 values below 5%. These results demonstrate high toxicity of contaminants from textile effluents for aquatic organisms (D. similis, cladocera). Similar data was observed for the raw effluent. These values are relevant for thinking radiation as a possible technology for such a type of effluent.
Electron beam irradiation of combined pharmaceuticals
2019 - BOIANI, NATHALIA F.; VILLARDI, BRUNO D.Q.; GARCIA, VANESSA S.G.; BORRELY, SUELI I.
There are serious evidences that justify the search for treatment technologies or processes combination for the improvement of decomposition for dozens of pharmaceuticals in wastewaters. Electron beam irradiation may play an important role in this scenario and relatively low doses have been reported for such purposes. The aim of the present study was to evaluate the toxic response of the crustacean Daphnia similis exposed to individual and combined pharmaceuticals. Several experimental trials of an acute immobilization test were performed with a mixture of pharmaceuticals composed of fluoxetine hydrochloride (Prozac®), and propranolol. Single pharmaceuticals were first tested separately. Toxicity of binary mixture was then assessed using five concentrations and 5 percentages of each substance in the mixture (0, 25, 50, 75, and 100%). Acute EC50% values ranged from 5.0 to 7.4 for fluoxetine and from 11.3 to 13.7 for propranolol. In mixture, values ranged from 6.4 to 9.8. Fluoxetine was more toxic for D.similis than propranolol. The different pharmaceuticals concentrations employed in a mixture showed no difference in toxicity values. When electron beam irradiation was applied, approximately 80% of acute effects were reduced at 5 kGy, and the mixture containing a higher percentage of fluoxetine, also showed a greater reduction of toxicity.
Tratamento de efluentes provenientes da indústria curtidora, empregando acelerador de elétrons
2018 - SOUZA, ANDERSON L. de; BOIANI, NATHALIA F.; BORRELY, SUELI I.
A indústria produtora de couros (também conhecida como curtume) coloca o país entre os maiores produtores do setor. O Brasil tem o maior rebanho comercial do mundo, exporta mais de 2 bilhões de dólares ao ano para 80 países e emprega mais de 40 mil pessoas. A indústria curtidora brasileira busca, estação após estação, produtos cada vez mais eficientes e ligados à sustentabilidade para os mais exigentes mercados nacionais e internacionais. A produção industrial mais limpa vem induzindo o desenvolvimento de tecnologias que permitam otimizar o uso das matérias primas, além da água. No que concerne ao efluente, composto de várias substâncias, como: óleos (animal, mineral, vegetal e sintético), gorduras, proteínas, corantes, agentes curtentes (cromo, titânio e tanino vegetal), resinas, amaciantes, depilantes (sulfeto de sódio), ainda é uma limitação que pode ser adequada com uso da tecnologia. Técnicas modernas como: separação por troca iônica, eletrodiálise, ultrafiltração, osmose reversa têm sido aplicadas para tratamento de efluentes industriais. Outras como o Processo de Oxidação Avançada, POA, utilizando aceleradores de feixe de elétrons. O efluente bruto foi irradiado com doses de 20 kGy, 30 kGy, 40 kGy e 50 kGy. A eficiência deste processo foi avaliada pela caracterização da matéria orgânica (DBO e DQO), e ensaio de toxicidade aguda com o microcrustáceo Daphnia similis. A radiação ionizante mostrou-se eficiente na degradação da matéria orgânica e na redução da toxicidade dos efluentes em estudo.
Electron beam irradiation of textile effluents and non-ionic ethoxylated surfactant for toxicity and color removal
2017 - SOLE, STEPHANIE V. DEL; GARCIA, VANESSA S.G.; BOIANI, NATHALIA F.; ROSA, JORGE M.; SILVA, LEONARDO G. de A. e; BORRELY, SUELI I.
Textile industry has an expressive scenario in the world economy and Brazil is the 5th in the textile production. By 2015, Brazilian textile production represented US $ 39.3 billion, accounting for more than 1.8 million tons of fabric (ABIT, 2017). The effluents from textile industry are highlighted by quantity of wastewater discharged and variety of substances (dyes, bleaching agents, surfactants, salts, acids, among others). Such compounds often prove to be toxic to aquatic biota. This present study aims to assess toxicity of whole effluents, before and after irradiation (by electron beam accelerator, EBI). In addition, the reduction of the effluent color after irradiation is also very important. Daphnia similis and Vibrio fischeri were the biological systems applied for toxicity evaluations. Previous results demonstrated the surfactant as the main toxic compound, in the untreated and irradiated forms, EC 50 = 0.44 ppm ± 0.02 (untreated); EC 50 = 0.46 % ± 0.07 (irradiated). The irradiation was effective in reducing the color of the effluent, starting from 0.5 kGy. EB radiation may be proposed as an alternative treatment for the final effluent from textile processing, mainly for reuse purposes.
Ecotoxicological study of pharmaceutical mixture in water solution and its tretability
2015 - TOMINAGA, FLAVIO K.; BOIANI, NATHALIA F.; GRANIERI, REGINALDO I.; BORRELY, SUELI I.