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Your search keyword '"Costa Lelis, Roberto Carlos"' showing total 11 results
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2. Produção e desempenho de carvão ativado fisicamente a partir de Bambusa vulgaris

Author

Morais, Rayssa de Medeiros, Santana, Gregório Mateus, Costa Lelis, Roberto Carlos, Paes, Juarez Benigno, Schueler, Maria Vanessa Egger, and Morbeck, Fernanda Lago

Subjects
Adsorventes, Adsorbents, Bambu, Resource management, Gestão de recursos, Bamboo
Abstract

Activated carbon (AC) was produced from Bambusa vulgaris to evaluate its potential of methylene blue dye (MB) adsorption. AC was prepared by direct physical activation, using the water vapor as activating agent. It was characterized considering the gravimetric yield of AC, the pH point of zero charge, Boehm titration method, surface area, volume and pore diameter analysis and superficial morphology. The application of AC was performed with kinetic studies and adsorption isotherms by the Langmuir and Freundlich isotherm models. The material produced presented surface area of 684.69 m2 g-1, pH point of zero chargeof 7.32 and predominance of acidic groups on their surface. By the micrographs analysis it was possible to verify the development of the material porosity due to activation. The maximum adsorption capacity for the MB dye was 301.07 mg g-1 the Langmuir model presented the best adjustment. The AC obtained from Bambusa vulgaris presented excellent texture and adsorption properties are it was very efficient in MB dye adsorption. Foi produzido carvão ativado (CA) a partir de Bambusa vulgaris para avaliar seu potencial para adsorção do corante azul de metileno (AM). O CA foi preparado mediante ativação física direta, utilizando como agente ativante o vapor d’água sendo caracterizado quanto ao rendimento gravimétrico em CA, pH do ponto de carga zero, método titulométrico de Boehm, análise de área superficial, volume e diâmetro dos poros e da morfologia superficial. Para aplicação do CA realizou-se estudos de cinética e isotermas de adsorção, tendo aplicados modelos de isotermas de Langmuir e Freundlich. O material produzido apresentou área superficial de 684,69 m2 g-1, pH do ponto de carga zero de 7,32 e predominância de grupos ácidos em sua superfície. Pela análise da micrografia foi possível verificar o desenvolvimento da porosidade do material devido à ativação. A capacidade máxima de adsorção para o corante AM foi de 301,07 mg g-1 com melhor ajuste ao modelo de Langmuir. O CA obtido a partir de Bambusa vulgaris apresentou excelentes propriedades texturais e adsortivas, sendo eficiente na adsorção do corante azul de metileno.

Published
2019

4. Avaliação da emissão de formaldeído em compósitos fabricados com adição de cascas de Pinus caribaea var. caribaea.

Author

Egger Schueler, Maria Vanessa, Costa Lelis, Roberto Carlos, Miguel do Nascimento, Alexandre, Lago Morbeck, Fernanda, de Medeiros Morais, Rayssa, and Mateus Santana, Gregório

Abstract

Copyright of Brazilian Journal of Wood Science / Revista Ciência da Madeira is the property of Brazilian Journal of Wood Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2019
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5. Produção de carvão ativado a partir de Eucalyptus dunnii para adsorção de corante azul de metileno.

Author

de Medeiros Morais, Rayssa, Mateus Santana, Gregório, Costa Lelis, Roberto Carlos, Egger Schueler, Maria Vanessa, Lago Morbeck, Fernanda, and Benigno Paes, Juarez

Abstract

Copyright of Brazilian Journal of Wood Science / Revista Ciência da Madeira is the property of Brazilian Journal of Wood Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2019
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6. Propriedades de adesivo aplicado em painéis a partir da substituição por lignossulfonato do processo sulfito.

Author

Correia Silva, Gilmar, Costa Lelis, Roberto Carlos, de Lima Oliveira, Gisely, Couto da Silva, Bruno, da Silva Lossano, Wagner César, and dos Santos Abreu, Heber

Abstract

Copyright of Ciência Florestal (01039954) is the property of Ciencia Florestal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2019
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7. Produção e desempenho de carvão ativado fisicamente a partir de Bambusa vulgaris.

Author

de Medeiros Morais, Rayssa, Mateus Santana, Gregório, Costa Lelis, Roberto Carlos, Benigno Paes, Juarez, Egger Schueler, Maria Vanessa, and Lago Morbeck, Fernanda

Subjects
POINTS of zero charge, ADSORPTION capacity, FREUNDLICH isotherm equation, METHYLENE blue, WATER vapor, ACTIVATED carbon, LANGMUIR isotherms
Abstract

Copyright of Brazilian Journal of Forest Research / Pesquisa Florestal Brasileira is the property of Brazilian Journal of Forest Research / Pesquisa Florestal Brasileira and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2019
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8. DENSITOMETRIA DE RAIOS X NA AVALIAÇÃO DA DENSIDADE EM PAINÉIS DE PARTÍCULAS.

Author

Gomes Gonçalves, Fabricio, Costa Lelis, Roberto Carlos, Monteiro de Carvalho, Alexandre, and Tomazello Filho, Mário

Abstract

Copyright of Ciência Florestal (01039954) is the property of Ciencia Florestal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2018
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9. CHAPAS AGLOMERADAS CONFECCIONADAS COM UREIA-FORMALDEÍDO SOB ADIÇÃO DE TANINO EM PÓ.

Author

Gomes Gonçalves, Fabricio, Costa Lelis, Roberto Carlos, da Silva Oliveira, José Tarcísio, Aparecida Garcia, Rosilei, and Oliveira Brito, Edvá

Abstract

Copyright of Ciência Florestal (01039954) is the property of Ciencia Florestal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2017

10. AVALIAÇÃO DE ADESIVOS À BASE DE TANINOS DE Pi nus caribaea var. bahamensis E DE Acacia mearnsii NA FABRICAÇÃO DE PAINÉIS AGLOMERADOS.

Author

Carvalho, Amélia Guimarães, Costa Lelis, Roberto Carlos, and do Nascimento, Alexandre Miguel

Abstract

Copyright of Ciência Florestal (01039954) is the property of Ciencia Florestal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2014

11. O USO DA FARINHA DE Orbignya speciosa NA FORMULAÇÃO DE ADESIVO PARA COMPENSADOS.

Author

Almeida, Vanessa Coelho, de Cássi Oliveira Carneiro, Angélica, Vital, Benedito Rocha, and Costa Lelis, Roberto Carlos

Abstract

Copyright of Ciência Florestal (01039954) is the property of Ciencia Florestal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2014
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