33 documents found, page 1 of 4
Oxidação de fármacos por cloro e formação de subprodutos em amostras aquosas em...
Souza, Brígida Prieto de; Lima, Diego Roberto Sousa; Aquino, Sergio Francisco de; Quaresma, Amanda de Vasconcelos; Baeta, Bruno Eduardo LoboFármacos e desreguladores endócrinos são encontrados em águas naturais brasileiras, incluindo alguns mananciais de abastecimento, também em função da baixa cobertura de coleta e tratamento de esgotos no Brasil. Nesse cenário, o presente trabalho intentou avaliar a remoção de três fármacos - sulfametoxazol (SMX), diclofenaco (DCF) e 17β-estradiol (E2) - em água destilada por meio da oxidação com cloro (hipoclori...
Application of residual yeast as a source of redox mediators for the anaerobic ...
Victral, Davi Madureira; Aquino, Sergio Francisco de; Silva, Silvana de Queiroz; Baeta, Bruno Eduardo LoboThis work investigated the anaerobic degradation of the model azo dye Remazol Yellow Gold RNL in batch reactors using discharged residual yeast as the source of redox mediators (RM). Two yeast lysis methods (mechanical lysis and sonication) were tested and optimized to produce a riboflavin-rich yeast lysate. The reactors were operated at 25 oC for 48 hours, evaluating the effect of external carbon source (gluco...
Influence of the applied organic load (OLR) on textile wastewater treatment usi...
Baeta, Bruno Eduardo Lobo; Lima, Diego Roberto de Sousa; Silva, Silvana de Queiroz; Aquino, Sergio Francisco deThis paper evaluated the treatment of textile wastewater in submerged anaerobic membrane bioreactors (SAMBR) operated on a bench scale. Particularly, the influence of operational conditions, such as the applied organic rate (OLR) and the dilution factor (for toxicity attenuation) of the textile wastewater, was evaluated on color and organic matter removal. In addition, the effect of powdered activated carbon (P...
Use of aqueous two-phase PEG-salt systems for the removal of anionic surfactant...
Murari, Gabriella Frade; Penido, Jussara Alves; Silva, Heriveltom Morais da; Baeta, Bruno Eduardo Lobo; Aquino, Sergio Francisco deLinear alkylbenzene sulfonates (LAS) are synthetic anionic surfactants that are extensively used in many industries. As a result, large volumes of effluents containing high levels of these compounds are discharged into water bodies, causing risks to aquatic flora and fauna. Then, there is a need for environmentally safe and economically viable technologies for the removal of LAS from aqueous matrices. The prese...
Two-stage fractionation of sugarcane bagasse by autohydrolysis and glycerol org...
Meighan, Brittany Nicole; Lima, Diego Roberto de Sousa; Cardoso, Wilson Junior; Baeta, Bruno Eduardo Lobo; Herrera Adarme, Oscar FernandoBioethanol production from lignocellulose biomass offers a solution to current environmental challenges caused by fossil fuel energy resources, while satisfying the biorefinery concept. In this study, two-stage fractionation (autohydrolysis (AH) followed by glycerol organosolv delignification (GOD)) of sugarcane bagasse (SCB) was studied as a function of temperature, time, glycerol content and liquid-to-solid (...
Fármacos e desreguladores endócrinos em águas brasileiras : ocorrência e técnic...
Lima, Diego Roberto Sousa; Tonucci, Marina Caldeira; Libânio, Marcelo; Aquino, Sergio Francisco deAs ações antrópicas têm fomentado a presença de diversos microcontaminantes nos corpos d’água. Desses, mais recentemente, os fármacos e os desreguladores endócrinos têm chamado a atenção da comunidade científica acerca da crescente exposição dos corpos d’água a esses fármacos e desreguladores. As fontes de contaminação englobam produtos de limpeza e higiene pessoal, fármacos de diversas classes, hormônios natur...
Hierarquização da eficiência de remoção de cianotoxinas por meio de adsorção em...
Silva, Maria Natália Costa e; Oliveira, Rui de; Ceballos, Beatriz Susana Ovruski; Guerra, Alaine de Brito; Aquino, Sergio Francisco de; Libânio, MarceloO trabalho objetivou avaliar a remoção concomitante de duas cianotoxinas - microcistina-LR e saxitoxina-STX - por meio da adsorção em carvão ativado granular. Em primeira etapa, três carvões de granulometrias distintas, dois de coco de dendê e um mineral, foram avaliados na adsorção de microcistina-LR em água destilada e tratada com concentrações de 3,9 a 9,4 ug.L-1. O carvão de coco de dendê de menor granulome...
Characterization of enalapril and ranitidine chlorination by-products by liquid...
Quintão, Frederico Jehár Oliveira; Souza, Mariana Pierotti de; Silva, Silvana de Queiroz; Aquino, Sergio Francisco deDue to its low cost, its capability for disinfection and oxidation, chlorination using gaseous chlorine or hypochlorite salts, has also been commonly applied in water treatment plants for oxidation and disinfection purposes. Little is known about the identity and toxicity of by-products resulting from the chlorination of pharmaceutical micropollutants, such as enalapril (ENA) and ranitidine (RAN). ENA and RAN c...
Anaerobic digestion of hemicellulose hydrolysate produced after hydrothermal pr...
Ribeiro, Fernanda Resende; Passos, Fabiana; Gurgel, Leandro Vinícius Alves; Baeta, Bruno Eduardo Lobo; Aquino, Sergio Francisco deIn the context of a sugarcane biorefinery, sugarcane bagasse produced may be pretreated generating a solid and liquid fraction. The solid fractionmay be used for 2G bioethanol production,while the liquid fraction may be used to produce biogas through anaerobic digestion. The aimof this study consisted in evaluating the anaerobic digestion performance of hemicellulose hydrolysate produced after hydrothermal pret...
High resolution mass spectrometry elucidation of captopril´s ozonation and chlo...
Quintão, Frederico Jehár Oliveira; Brandão, Geraldo Célio; Silva, Silvana de Queiroz; Aquino, Sergio Francisco de; Afonso, Robson José de Cássia FrancoThe article evaluated the degradation of the captopril in aqueous solution after ozonation and chlorination. The process was continuously monitored focusing on the identification, mass spectrometry and elucidation of its by-products by applying direct infusion and high performance liquid chromatography, electrospray ionization high resolution mass spectrometry, in the negative ion mode. The cytotoxicity of its ...