Navegação Ciências Exatas e da Terra por Autor "Dias, Silvio Luis Pereira"
Resultados 1-16 de 16
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Activated carbon from sewage sludge for removal of sodium diclofenac and nimesulide from aqueous solutions
Reis, Glaydson Simões dos; Mahbub, Mohammad Khalid Bin; Wilhelm, Michaela; Lima, Éder Cláudio; Sampaio, Carlos Hoffmann; Saucier, Caroline; Dias, Silvio Luis Pereira (2016) [Artigo de periódico]Sludge based activated carbons (ACs) were used to remove selected pharmaceuticals such as diclofenac (DCF) and nimesulide (NM) from aqueous solutions. The powered sewage sludge was mixed with different proportions of ZnCl2. ... -
Activated carbon obtained from sapelli wood sawdust by microwave heating for o-cresol adsorption
Thue, Pascal Silas; Reis, Glaydson Simões dos; Lima, Éder Cláudio; Sieliechi, Joseph Marie; Dotto, Guilherme Luiz; Wamba, Alfred Giresse Ndi; Dias, Silvio Luis Pereira; Pavan, Flávio André (2017) [Artigo de periódico]Activated carbon (AC) was prepared from sapelli wood sawdust using a microwave heating process. The biomass was mixed with inorganic components (lime + ZnCl2 and FeCl3) to form a homogeneous paste. The AC samples are denoted ... -
Activated carbons from avocado seed : optimisation and application for removal of several emerging organic compounds
Leite, Anderson José Barcellos; Saucier, Caroline; Lima, Éder Cláudio; Reis, Glaydson Simões dos; Umpierres, Cibele Santanna; Mello, Beatris Lisboa; Shirmardi, Mohammad; Dias, Silvio Luis Pereira; Sampaio, Carlos Hoffmann (2018) [Artigo de periódico]In this study, avocado seed was successfully used as raw material for producing activated carbons by conventional pyrolysis. In order to determine the best condition to produce the activated carbons, a 22 full-factorial ... -
Adsorption of alizarin red s dye by carbon nanotubes : experimental and theoretical investigation
Machado, Fernando Machado; Ayyappan, Sophia Carmalin; Lima, Éder Cláudio; Dias, Silvio Luis Pereira; Prola, Liziê Daniela Tentler; Saucier, Caroline; Jauris, Iuri Medeiros; Silva, Ivana Zanella da; Fagan, Solange Binoto (2016) [Artigo de periódico]This study evaluated the feasibility of removing Alizarin Red S dye (ARS) from aqueous solutions, using nanoadsorbents such as single and multiwalled carbon nanotubes (SWCNT and MWCNT, respectively). The effect of pH, ... -
Avaliação da degradação térmica do caroço de abacate residual para a produção de biocarvões
Machado, Régis Barlem; Dias, Silvio Luis Pereira; Vaghetti, Júlio César Pacheco; Machado, Geraldo Beyer; Bianchi, Otávio (2024) [Artigo de periódico]The thermal degradation kinetics of avocado seed biomass (Persea americana) was investigated at the heating rates of 5, 15, 20 and 25 ºC min-1 using thermogravimetric (TGA) and differential thermogravimetric (DTG) analysis ... -
Azul de metileno imobilizado na celulose/TiO2 e SiO2/TiO2 : propriedades eletroquímica e planejamento fatorial
Scotti, Rodrigo; Lima, Éder Cláudio; Benvenutti, Edilson Valmir; Piatnicki, Clarisse Maria Sartori; Dias, Silvio Luis Pereira; Gushikem, Yoshitaka; Kubota, Lauro Tatsuo (2006) [Artigo de periódico]The electrochemical properties of methylene blue immobilized on cellulose/TiO2 and mixed oxide SiO2/TiO2 matrices were investigated by means of cyclic voltammetry. The electron mediator property of the methylene blue was ... -
Cationic dyes immobilized on cellulose acetate surface modified with titanium dioxide : factorial design and an application as sensor for NADH
Hoffmann, Andrea Anilda; Dias, Silvio Luis Pereira; Benvenutti, Edilson Valmir; Lima, Éder Cláudio; Pavan, Flávio André; Rodrigues, Jordana Roider; Scotti, Rodrigo; Ribeiro, Emerson Schwingel; Gushikem, Yoshitaka (2007) [Artigo de periódico]As propriedades eletroquímicas dos corantes catiônicos, azul de meldola e azul de toluidina, imobilizados na superfície do acetato de celulose modificado com dióxido de titânio foram investigadas por voltametria cíclica. ... -
Conversion of Eragrostis plana Nees leaves to activated carbon by microwave-assisted pyrolysis for the removal of organic emerging contaminants from aqueous solutions
Cunha, Mariene Rochefort; Lima, Éder Cláudio; Cimirro, Nilton Fabiano Gelos Mendes; Thue, Pascal Silas; Dias, Silvio Luis Pereira; Gelesky, Marcos Alexandre; Dotto, Guilherme Luiz; Reis, Glaydson Simões dos; Pavan, Flávio André (2018) [Artigo de periódico]Eragrostis plana Nees leaves, abundant lignocellulosic biomass, was used as carbon source for preparation of activated carbon, by using microwave-assisted pyrolysis and chemical activation. The novel activated carbon (MWEPN) ... -
Giombo persimmon seed (GPS) an alternative adsorbent for the removal Toluidine Blue dye from aqueous solutions
Bretanha, Marilice Silveira; Dotto, Guilherme Luiz; Vaghetti, Júlio César Pacheco; Dias, Silvio Luis Pereira; Lima, Éder Cláudio; Pavan, Flávio André (2016) [Artigo de periódico]Giombo persimmon seeds (GPS) (Diospyrus kaki L) were used as a novel low-cost adsorbent for the removal of Toluidine Blue dye (TB) from aqueous solution by batch contact adsorption mode at 25°C. The GPS adsorbent was ... -
Methylene blue immobilized on cellulose acetate with titanium dioxide: an application as sensor for ascorbic acid
Hoffmann, Andrea Anilda; Dias, Silvio Luis Pereira; Rodrigues, Jordana Roider; Pavan, Flávio André; Benvenutti, Edilson Valmir; Lima, Éder Cláudio (2008) [Artigo de periódico]Neste trabalho, o corante azul de metileno foi imobilizado na superfície do acetato de celulose modificado com dióxido de titânio produzindo um material híbrido sólido denominado de CA-TiO2MB. O experimento produziu uma ... -
Photocatalytic studies of tio2/sio2 nanocomposite xerogels
Waseen, Muhammad; Shah, Zeban; Cataluña, Ricardo Verza; Dias, Silvio Luis Pereira; Lima, Éder Cláudio; Reis, Glaydson Simões dos; Vaghetti, Júlio César Pacheco; Alencar, Wagner Soares de; Mahmood, Khalid (2017) [Artigo de periódico]The use of titania-silica materials in photocatalytic processes has been proposed as an alternative to the conventional TiO2 catalysts, in order to facilitate the separation of products after the reaction. However, despite ... -
Physicochemical modeling of reactive violet 5 dye adsorption on home-made cocoa shell and commercial activated carbons using the statistical physics theory
Sellaoui, Lotfi; Lima, Éder Cláudio; Dotto, Guilherme Luiz; Dias, Silvio Luis Pereira; Lamine, Abedelmottaleb Ben (2017) [Artigo de periódico]Two equilibrium models based on statistical physics, i.e., monolayer model with single energy and multilayer model with saturation, were developed and employed to access the steric and energetic aspects in the adsorption ... -
Planejamento estatístico de experimentos como uma ferramenta para otimização das condições de biossorção de Cu(II) em batelada utilizando-se casca de nozes pecã como biossorvente
Brasil, Jorge de Lima; Vaghetti, Júlio César Pacheco; Royer, Betina; Santos Júnior, Araci Araújo dos; Simon, Nathália Marcolin; Pavan, Flávio André; Dias, Silvio Luis Pereira; Lima, Éder Cláudio (2007) [Artigo de periódico]In order to reduce the total number of experiments for achieving the highest amount of adsorbed Cu2+ (qmax) using pecan nutshells (Carya illinoensis) as biosorbent, a full 24 factorial design with two central points was ... -
Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zonc ions
Tarley, César Ricardo Teixeira; Ávila, Thiago C. de; Segatelli, Mariana Gava; Lima, Giovana de Fátima; Peregrino, Gabrielly dos S.; Scheeren, Carla Weber; Dias, Silvio Luis Pereira; Ribeiro, Emerson Schwingel (2010) [Artigo de periódico]No presente trabalho foi avaliado um novo material como adsorvente, SiO2/Al2O3/Nb2O5 (designado SiAlNb), empregado na determinação e pré-concentração online de Zn2+ por um método espectrofotométrico por injeção em fluxo. ... -
Synthesis and enzymatic evaluation of the guanosine analogue 2-amino-6-mercapto-7-methylpurine ribonucleoside (MESG). Insights into the phosphorolysis reaction mechanism based on the blueprint transition state: sn1 or sn2
Silveira Neto, Brenno Amaro da; Lápis, Alexandre Augusto Moreira; Netz, Paulo Augusto; Spencer, John; Dias, Silvio Luis Pereira; Tamborim Takeuchi, Silvia Margonei Mesquita; Basso, Luiz Augusto; Santos, Diogenes Santiago; Dupont, Jairton (2010) [Artigo de periódico]A modificação experimental para a síntese do MESG (2-amino-6-mercapto-7-metilpurina ribonucleosídeo) 1 foi realizada com sucesso e sua caracterização total apresentada. ESI(+)-MSMS em alta resolução foram realizados indicando ... -
Synthesis of silica xerogels with high surface area using acetic acid as catalyst
Arenas, Leliz Ticona; Simm, Carolina Wildner; Gushikem, Yoshitaka; Dias, Silvio Luis Pereira; Moro, Celso Camilo; Costa, Tania Maria Haas; Benvenutti, Edilson Valmir (2007) [Artigo de periódico]Nesse trabalho foi estudada a influência do ácido acético na estrutura de poros e na área superficial de sílicas preparadas pelo método sol-gel. Condições experimentais de síntese, tais como temperatura de policondensação ...