Search Results - "Vieira, Eunice F. S."

The removal of anionic dyes from aqueous solutions in the presence of anionic surfactant using aminopropylsilica—A kinetic study by Cestari, Antonio R., Vieira, Eunice F.S., Vieira, Gláucia S., Almeida, Luis E.

“…In this study, the aminopropyl-silica (Sil-NH 2) was used to adsorb a yellow- and a red-dye from aqueous solutions at pH 4.0. New data concerning the influence…”
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The removal of an anionic red dye from aqueous solutions using chitosan beads—The role of experimental factors on adsorption using a full factorial design by Cestari, Antonio R., Vieira, Eunice F.S., Mota, Jackeline A.

“…A factorial design was employed to evaluate the quantitative removal of an anionic red dye from aqueous solutions on epichlorohydrin-cross-linked chitosan. The…”
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Synthesis, characterization and hydration analysis of a novel epoxy/superplasticizer oilwell cement slurry – Some mechanistic features by solution microcalorimetry by Cestari, Antonio R., Vieira, Eunice F.S., Silva, Ellen C.S., Alves, Fernanda J., Andrade, Marcos A.S.

“…[Display omitted] ► A new epoxy/polyacrylate-modified oilwell cement slurry was synthesized. ► The morphological features of the new slurry were preserved…”
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Tetracycline release from chitosan/fish-scale-based membranes by Cortes, Gracy Karla da R., Vieira, Eunice F. S., Cestari, Antonio R., Chagas, Renata A.

“…ABSTRACT In this study, we aimed to develop new biocompatible membranes on the basis of chitosan (CHIT) and fish scale powder (ESC) from the species Leporinus…”
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Polysaccharide-Based Hydrogels: Preparation, Characterization, and Drug Interaction Behaviour by Vieira, Eunice F. S, Cestari, Antonio R, Airoldi, Claudio, Loh, Watson

“…Oxidized alginate (ADA) and oxidized alginate blended with chitosan (ADA-Chit) were prepared in the presence of borax and CaCl2, and their interactions with an…”
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Direct determinations of energetic parameters at chitosan/Cr(VI) interfaces by means of immersion heat-conduction microcalorimetry by Cestari, Antonio R., Vieira, Eunice F.S., Silva, Rivaldo C., Andrade, Marcos A.S.

“…Immersion microcalorimetry was employed to obtain energetic parameters at chitosan/Cr(VI) interfaces from aqueous solutions. The interaction thermodynamics is…”
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The removal of Cu(II) and Co(II) from aqueous solutions using cross-linked chitosan—Evaluation by the factorial design methodology by Cestari, Antonio R., Vieira, Eunice F.S., de Oliveira, Iataanderson A., Bruns, Roy E.

“…A 2 3 factorial design was employed to evaluate the quantitative removal of Cu(II) and Co(II) on glutaraldehyde-cross-linked chitosan from kinetic isotherms,…”
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Cement–epoxy/water interfaces – Energetic, thermodynamic, and kinetic parameters by means of heat-conduction microcalorimetry by Cestari, Antonio R., Vieira, Eunice F.S., Tavares, Andréa M.G., Andrade, Marcos A.S.

“…The cumulative heat release curves at epoxy–cement/water interfaces were well fitted to the multistep Avrami kinetic model. Hydration phenomena at cement/water…”
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Aggregation and adsorption of reactive dyes in the presence of an anionic surfactant on mesoporous aminopropyl silica by Cestari, Antonio R., Vieira, Eunice F.S., Vieira, Gláucia S., Almeida, Luis E.

“…A surface tension technique was used to determine the critical aggregation concentration (cac) of a yellow and a red dye in relation to the presence of the…”
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Synthesis and characterization of a novel fish scale-immobilized chitosan adsorbent—Preliminary features of dichlorophenol sorption by solution calorimetry by Mota, Jackeline A., Chagas, Renata A., Vieira, Eunice F.S., Cestari, Antonio R.

“…► A novel fish scale-immobilized chitosan adsorbent was synthesized and characterized. ► It was evaluated the sorption of dichlorophenol on the new adsorbent…”
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The removal of reactive dyes from aqueous solutions using chemically modified mesoporous silica in the presence of anionic surfactant—The temperature dependence and a thermodynamic multivariate analysis by Cestari, Antonio R., Vieira, Eunice F.S., Vieira, Gláucia S., da Costa, Luiz P., Tavares, Andréa M.G., Loh, Watson, Airoldi, Claudio

“…The three-parameter Sips adsorption model was successfully employed to modeled equilibrium adsorption data of a yellow and a red dye onto a mesoporous…”
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Poly(glutaraldehyde)-stabilized fish scale fibrillar collagen-some features of a new material for heavy metal sorption by Moura, Karine O., Vieira, Eunice F. S., Cestari, Antonio R.

“…In this work, fibrillar collagen on scales of Corvina fish (Micropogonias furnieri) was crosslinked and used as a new adsorbent for sorption of Cr(VI) from…”
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Preparation and characterization of polyalginate-glutaraldehyde membranes--Swelling analysis by microcalorimetry and adsorption kinetics of cationic dye by Vieira, Eunice F.S, da Costa, Luiz P, Cestari, Antonio R

“…Thin crosslinked polyalginate-glutaraldehyde membranes were prepared and characterized by Fourier-transformed infrared spectroscopy, thermal analysis (TG/DTG),…”
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Synthesis and characterization of epoxy-modified cement slurries—Kinetic data at hardened slurries/HCl interfaces by Cestari, Antonio R., Vieira, Eunice F.S., Pinto, Alane A., da Rocha, Fabio C.

“…In this study, two new epoxy-modified oilwell cement slurries were synthesized. All characterization measurements were performed and compared in relation to a…”
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The influence of in situ polymerized epoxidized A/F bisphenol-chitosan on features of oilwell cement slurry-Molecular-level analysis and long-term interaction of API fracturing fluid by Vieira, Eunice F. S., Lima, Pablo F., dos Santos, Ivory M. G., Mangrich, Antonio S., de França, Amanda A., Le Saoût, Gwenn, Cestari, Antonio R.

“…ABSTRACT A novel oilwell cement slurry was prepared with in situ polymerized epoxidized A/F bisphenol–chitosan and characterized by 29Si NMR and EPR…”
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An oilwell cement slurry additivated with bisphenol diglycidil ether/isophoronediamine—Kinetic analysis and multivariate modelings at slurry/HCl interfaces by Cestari, Antonio R., Vieira, Eunice F.S., Tavares, Andréa M.G., Andrade, Marcos A.S.

“…Loss of zonal isolation in oilwell cementing operations leads to safety and environmental problems. The use of new cement slurries can help to solve this…”
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Determination of kinetic parameters from isothermal calorimetry for interaction processes of pyrimethamine with chitosan derivatives by Vieira, Eunice F.S., Cestari, Antonio R., Lopes, Elaine C.N., Barreto, Ledjane S., Lázaro, Gilderman S., Almeida, Luis E.

“…The interaction of the antifolate drug pyrimethamine with chitosan derivatives, namely, chit-GLT (glutaraldehyde cross-linked chitosan gel beads) and chit-Cu…”
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The removal of the indigo carmine dye from aqueous solutions using cross-linked chitosan—Evaluation of adsorption thermodynamics using a full factorial design by Cestari, Antonio R., Vieira, Eunice F.S., Tavares, Andréa M.G., Bruns, Roy E.

“…A 2 3 factorial design was employed to evaluate the quantitative removal of the indigo carmine (IC) dye from aqueous solutions on glutaraldehyde cross-linked…”
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An alternative Avrami equation to evaluate kinetic parameters of the interaction of Hg(II) with thin chitosan membranes by Lopes, Elaine C.N., dos Anjos, Fernanda S.C., Vieira, Eunice F.S., Cestari, Antonio R.

“…In this work, thin chitosan membranes were utilized as an adsorbent for the removal of Hg(II) from aqueous solutions. A rise of temperature accelerates the…”
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A novel and efficient epoxy/chitosan cement slurry for use in severe acidic environments of oil wells—Structural characterization and kinetic modeling by Cestari, Antonio R., Vieira, Eunice F.S., Alves, Fernanda J., Silva, Ellen C.S., Andrade, Marcos A.S.

“…► A novel and efficient epoxy/chitosan cement slurry was synthesized. ► The crystalline patterns of the slurry were preserved after interaction with HCl. ► The…”
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