VANESSA SILVA GRANADEIRO GARCIA

VANESSA SILVA GRANADEIRO GARCIA

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Ecotoxicological approach of surfactants treated by ionizing radiation
2021 - GARCIA, VANESSA S.G.; ROSA, JORGE M.; SILVA, THALITA T.; BORRELY, SUELI I.
Removing surfactants from liquid effluents has been a fundamental issue since they are found in several industrial effluents, hospitals, restaurants, and even homes. When disposed into aquatic environmental, surfactants can implicate in significant changes, including several adverse effects to aquatic organisms. The present study was developed to assess the ecotoxicological effects of surfactants (anionic and nonionic) to aquatic organisms Vibrio fischeri bacteria, Daphnia similis crustacean. The ionizing radiation (Electron Beam Irradiation - EBI) was applied as a possible technology for the treatment of these contaminants in order to reduce acute toxic effects. The obtained data showed that the surfactants were toxic for both organisms, and the nonionic were more toxic than anionic. EB irradiation reduced surfactants toxicity by 40% acute toxic effects for nonionic surfactant and more than 70% for anionic, for both exposed organisms classes.
Avaliação ecotoxicológica de efluente têxtil submetido a radiação ionizante
2021 - GARCIA, VANESSA S.G.; TALLARICO, LENITA de F.; ROSA, JORGE M.; NAKANO, ELIANA; BORRELY, SUELI I.
O setor têxtil demanda elevada quantidade de água para o processo de beneficiamento das fibras, e adicionalmente gera um grande volume de efluente colorido e com diversos contaminantes. Estes são responsáveis por uma parcela importante na degradação dos corpos hídricos em diversas regiões do mundo, causando efeitos adversos aos ecossistemas. Devido a elevada carga tóxica, composição e coloração, geralmente esses efluentes necessitam de tratamentos complementares para melhorar a degradação. Desta forma, tem-se buscado tecnologias mais eficientes para a oxidação destes contaminantes, com ênfase para os processos oxidativos avançados, como a irradiação por feixe de elétrons. O processo com radiação ionizante promove a radiólise da água com formação de radicais hidroxila ou produtos moleculares que atuam na degradação dos compostos orgânicos. O presente estudo dedicou-se a análise da toxicidade aguda de um efluente têxtil (contendo corante reativo Red 239) em dois níveis tróficos do ambiente aquático, o microcrustáceo Daphnia similis e o caramujo Biomphalaria glabrata. A exposição para D. similis foi de 48 horas e o efeito observado foi a imobilidade dos organismos expostos, já para B. glabrata a exposição foi de 24h e observada a letalidade. Os resultados de toxicidade foram expressos pela CE(L)50 (Concentração efetiva/letal mediana). A radiação ionizante por feixe de elétrons foi proposta como tecnologia para tratamento do efluente visando a redução da toxicidade, sendo avaliadas as doses de 2,5 kGy e 5 kGy. As amostras foram irradiadas em Acelerador de Elétrons (Dynamitron®), com energia fixada em 1,4 MeV. A eficiência da irradiação quanto à redução de toxicidade foi obtida a partir dos valores de CE(L)50, transformados para unidade de toxicidade (UT= 100/CE(L)50). Com relação ao efeito agudo para os organismos avaliados, pode-se observar que o efluente bruto foi mais tóxico para o microcrustáceo, com CE50= 9,61% enquanto para B. glabrata foi obtido o valor de CL50=25,09%. As amostras irradiadas, os valores em relação a redução da toxicidade foram melhores se comparados ao efluente bruto: D. similis, CE50%= 12,62 (2,5 kGy); 17,24 (5 kGy), B. glabrata, CL50= 63% (2,5 kGy) e 70,71% (5 kGy). A partir da dose de 2,5 kGy já foi possível observar eficiência em relação a redução da toxicidade para ambos os organismos. Com 5 kGy, a eficiência em relação a redução de efeitos agudos foi superior a 64% em B. glabrata e superior a 44% para D. similis. Os resultados aqui obtidos confirmam que efluentes industriais, como os do setor têxtil, são críticos do ponto de vista de contaminação ambiental, destacando, assim, a necessidade de melhor gerenciamento, tratamento e descarte adequados destes efluentes. Com a tecnologia por feixe de elétrons, foram obtidos dados promissores em termos de tratamento com diminuição significativa da toxicidade.
Avaliação da toxicidade de surfactantes não iônico e aniônico submetidos a tratamento por feixe de elétrons
2021 - GARCIA, VANESSA S.G.; TOMINAGA, FLAVIO K.; BOIANI, NATHALIA F.; SILVA, THALITA T.; ROSA, JORGE M.; BORRELY, SUELI I.
Multiple adverse effects of textile effluents and reactive Red 239 dye to aquatic organisms
2021 - GARCIA, VANESSA S.G.; TALLARICO, LENITA de F.; ROSA, JORGE M.; SUZUKI, CELSO F.; ROUBICEK, DEBORAH A.; NAKANO, ELIANA; BORRELY, SUELI I.
Textile dyeing consumes high volumes of water, generating proportional number of colored effluents which contain several hazardous chemical. These contaminants can implicate in significant changes in aquatic environmental, including several adverse effects to organisms in different trophic levels. The present study was developed to assess the ecotoxicological effects of textile effluent samples and reactive Red 239 dye (used in cotton dyeing) to aquatic organisms Vibrio fischeri bacteria, Daphnia similis crustacean, and Biomphalaria glabrata snail (adults and embryos). Chronic assays with lethal and sublethal effects for Daphnia similis were included and performed only for textile effluents samples. The mutagenicity was also evaluated with Salmonella/microsome assay (TA98, TA100, and YG1041 strains). V. fischeri bacteria was the most sensitive to reactive Red 239 dye (EC50 = 10.14 mg L−1) followed by mollusk embryos at all stages (EC50 = 116.41 to 124.14 mg L−1), D. similis (EC50= 389.42 mg L−1), and less sensitive to adult snails (LC50= 517.19 mg L−1). The textile effluent was toxic for all exposed organisms [E(L)C50 < 15%] and B. glabrata embryos showed different responses in the early stages of blastulae and gastrulae (EC50 = 7.60 and 7.08%) compared to advanced development stages trochophore and veliger (EC50 = 21.56 and 29.32%). Developmental and sublethal effects in B. glabrata embryos and D. similis were evidenced. In the chronic assay with effluent, the EC10/NOEC = 3% was obtained. Mutagenic effects were not detected for dye aqueous solutions neither for effluents samples. These data confirmed the importance of evaluating the effects in aquatic organisms from different trophic levels and reinforce the need for environmental aquatic protection.
Toxicity and color reduction of reactive dyestuff RB 21 and surfactant submitted to electron beam irradiation
2021 - MELO, C.G.; ROSA, J.M.; GARCIA, V.S.G.; BORRELY, S.I.; PEREIRA, M.C.C.
There is an unwelcome reaction between the coloring and the water during the dyeing procedure, a portion of the coloring agent is lost in the bathing and it will compose the final whole effluent. The high absorbance index is related to lost dyestuffs and they also contribute with the toxic effects to the aquatic biota. In addition, these effluents contain large quantity of surfactants applied during dyeing baths, which also contribute to the high toxicity in these samples. The objective of this study was to evaluate electron beam irradiation technology, applied in samples of the Color Index Reactive Blue 21 (RB 21) dyestuff and in samples of surfactant non-ionic and in order to reduce toxicity for both and for RB 21, color reduction. Among the objectives of the study there are the dyestuff exhaustion degree, and some physical-chemical parameters. The acute toxicity assays were carried with Daphnia similis microcrustacean and the results of the dyestuff solution were: the irradiated samples with concentration 0.61 g L-1 did not present significant results, the EC 50 (%) value was to 58.26 for irradiated sample with 2.5 kGy and EC 50 (%) 63.59 for sample irradiated with 5 kGy. The surfactant was more toxic than RB 21, with EC 50 (%) value at 0.42. The color reduction reached 63.30% for the sample of the lowest concentration of effluent. There was a reduction of pH during irradiation.
Toxicity and color reduction of reactive dyestuff RB21 and surfactant submitted to electron beam irradiation
2019 - MELO, CAMILA G.; ROSA, JORGE M.; GARCIA, VANESSA S.G.; BORRELY, SUELI I.; PEREIRA, MARIA da C.C.
There is an unwelcome reaction between the coloring and the water during the dyeing procedure, a portion of the coloring agent is lost in the bathing and it will compose the final whole effluent. The high absorbance index is related to lost dyes and they also contribute with the toxic effects to the aquatic biota. In addition, these effluents contain large quantity of surfactants applied during dyeing baths, which also contribute to the high toxicity in these samples. The objective of this study was to evaluate electron beam irradiation technology, applied in samples of the Color Index Reactive Blue 21 (RB21) dye and in samples of surfactant nonionic and in order to reduce toxicity for both and for RB21, color reduction. Among the objectives of the study there are the dye exhaustion degree, and some physic-chemical parameters. The acute toxicity assays were carried with Daphnia similis microcrustacean and the results for of dyestuff solution were: the irradiated samples with concentration of 0.61g.L-1 did not present significant results, the EC 50(%) value was to 58.26 for irradiated sample with 2.5kGy and EC 50(%) 63.59 for sample irradiated with 5kGy. The surfactant was more toxic than RB 21, with EC 50(%) value at 0.42. The color reduction reached 63.30% for the sample of the lowest concentration of effluent. There was a reduction of pH during irradiation.
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.
Estudo sobre toxicidade do efluente e do consumo hídrico e energético no tingimento de poliamida
2018 - GARCIA, VANESSA S.G.; PEREIRA, MARIA C.; ROSA, JORGE M.; BORRELY, SUELI I.
O estudo concentrou-se na determinação do consumo hídrico e energético durante o tingimento da poliamida, bem como na avaliação do efeito tóxico do efluente para o microcurstáceo Daphnia similis. O processo de tingimento necessário para o tingimento de um quilograma de substrato consome energia suficiente para um banho de nove horas de duração utilizando-se um chuveiro convencional (4000 W). O efluente pode ser considerado como muito tóxico tendo em vista que a CE50 foi 0,61 ± 0,21 (%, v/v) após 48 horas de exposição. Conforme orientação da Resolução CONAMA 430/2011 o efluente deve ser tratado em nível tal que não induza toxicidade quando lançado no corpo receptor. Busca por tecnologias que permitam redução de toxicidade, reuso de efluentes e otimização de processos de tingimento, são de extrema necessidade dentro desta atividade industrial.
Toxicity and environmental impacts approached in the dyeing of polyamide, polyester and cotton knits
2019 - ROSA, JORGE M.; GARCIA, VANESSA S.G.; BOIANI, NATHALIA F.; MELO, CAMILA G.; PEREIRA, MARIA C.C.; BORRELY, SUELI I.
Three colouration process was analyzed, in which consumption of water, the spent of electrical and thermal energy, emission of carbon dioxide besides effluent toxicity of dyeing of polyamide, cotton and polyester knits were approached. the dyeing of polyamide knit presented lowest consumption of electrical energy, the dyeing of polyester knit presented the lowest consumption of thermal energy and emission of co2 molecules into atmosphere, and the effluent of cotton dyeing presented lowest acute toxicity (CE50) to Daphnia similis.
Electron beam irradiation of textile effluents and non-ionic ethoxylated surfactant for toxicity and color removal
2019 - BORRELY, S.I.; SILVA, L.G.A.; DEL SOLE, S.V.; GARCIA, V.S.G.; BOIANI, N.F.; ROSA, J.M.
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. 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 for reducing color of the effluent, starting from 0.5 kGy. EB irradiation may be proposed as an alternative treatment for the final effluent from textile processing, mainly for reuse purposes.