Use of sawdust Eucalyptus sp. in the preparation of activated carbons

Couto, Gabriela Martucci; Dessimoni, Anelise Lima de Abreu; Bianchi, Maria Lúcia; Perígolo, Deise Morone; Trugilho, Paulo Fernando

doi:10.1590/s1413-70542012000100009

Cited by 32 publications

(23 citation statements)

References 25 publications

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“…In addition, there is an increase in C/H ratio and a decrease in O/C ratio. The C/H increase indicates an increase in condensation and flavoring reactions (BRUM et al, 2008;AVELAR et al, 2010;PEREIRA, 2010;COUTO et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

“…AC is a highly porous carbonaceous material, with an elevated internal surface area and functional groups in its surface with an adsorption affinity for various contaminants. The AC is obtained from a controlled pyrolysis of a raw material, where temperatures vary from 400 to 1000°C (RIBEIRO, 2005;BRUM et al, 2008;AVELAR et al, 2010;COUTO et al, 2012;CARVAJAL-BERNAL et al, 2015;HÚMPOLA et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Activated carbon from bamboo (<i>Bambusa vulgaris</i>) waste using CO2 as activating agent for adsorption of methylene blue and phenol

et al. 2019

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Activated carbon from bamboo (Bambusa vulgaris) waste using CO 2 as activating agent for adsorption of methylene blue and phenolCarvão ativado a partir de resíduos de bambu (Bambusa vulgaris) utilizando CO 2 como agente ativante para adsorção de azul de metileno e fenol Abstract Bamboo (Bambusa vulgaris) wastes were used as raw material for producing activated carbon. The materials were collected and turned into activated carbons by carbonization (500 °C, 1.67 °C.min -1 , 60 min) and activation (800 °C, 10 °C.min -1 , 60 min) processes with CO 2 (100 mL.min -1 ). The obtained material (CO 2 AC) was characterized by its yield, elemental analysis, ash content, surface area (S BET ), Boehm titration method, scanning electron microscopy and used as adsorbent for removing the methylene blue and phenol contaminants. The Langmuir and Freundlich isotherm models were selected for understanding the adsorption process. CO 2 AC produced showed yield of 21.6%, carbon content of 82.13% and S BET of 856.78 m 2 .g -1 , presenting rapid removal and high adsorption capacity for methylene blue (298.82 mg.g -1 ) and phenol (558.29 mg.g -1 )Santana, G. M.; Trugilho, P. F.; Borges, W. M. S.; Bianchi, M. L.; Paes, J. B.; Nobre, J. R. C.; Morais, R. M. 770

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Activated carbon from bamboo (<i>Bambusa vulgaris</i>) waste using CO2 as activating agent for adsorption of methylene blue and phenol

et al. 2019

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“…The addition of low granulometry substrates, for example, rice bran, likely decreased internal empty spaces available in the substrate (Rossi et al, 2003), reducing gas exchange with the atmosphere and oxygen availability, which is fundamental for aerobic microorganisms. Additionally, the substrate C:N ratio is important for mycelial growth (Mwangi et al, 2012) and alterations in this parameter can significantly change fungal growth rates (Couto et al, 2012;Mwangi et al, 2012). The addition of corncobs, a substrate with lower nitrogen content than Jc, decreased the fungal growth rate (Figure 1).…”

Section: Discussionmentioning

confidence: 99%

Jatropha seed cake supplementation for improved fungal growth and later use as animal feed

Nunes¹,

Luz²,

Paes³

et al. 2014

Afr. J. Microbiol. Res.

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“…O carvão ativado trata-se de um material com formação microcristalina, não grafítica, sendo um sólido amorfo, encontrado essencialmente na sua forma de pó ou granulado, que é ativado para desenvolver sua porosidade, aumentando o volume de poros e a área de superfície (GONÇALVES et al, 2006;MARSH;REINOSO, 2006;COUTO et al, 2012;NASCIMENTO et al, 2014;DANISH;AHMAD, 2018).…”

Section: Dentre As Inúmeras Espécies Plantadas Encontra-se Ounclassified

Produção de carvão ativado a partir de Eucalyptus dunnii para adsorção de corante azul de metileno

Morais¹,

Santana²,

Lelis³

et al. 2019

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RESUMO O carvão ativado é um adsorvente produzido através do processo de ativação física ou química, dando origem a um material com alta porosidade e grande área superficial, fundamental para remoção de contaminantes do meio ambiente. Diante disso, objetivou-se produzir carvão ativado a partir de Eucalyptus dunnii e aplicá-lo para adsorção do corante azul de metileno em meio aquoso. Destarte, o carvão ativado foi preparado mediante ativação física, utilizando como agente ativante o vapor d'água. Em seguida, realizadas caracterizações referentes ao rendimento gravimétrico em carvão ativado (RGCA), análise de área superficial (SBET), volume e diâmetro dos poros e microscopia eletrônica de varredura. Para avaliação da capacidade adsortiva foram realizados estudos de cinética e isotermas de adsorção, em diferentes concentrações do corante, e aplicados os modelos de isotermas de Langmuir e Freundlich. O material produzido apresentou RGCA de 15%, SBET igual a 532,32 m 2 g -1 e morfologia superficial porosa. Além disso, apresentou uma capacidade máxima de adsorção (qm) para o corante azul de metileno igual a 293,30 mg g -1 , se ajustando melhor ao modelo de Langmuir (monocamada). Dessa maneira, conclui-se que o material produzido obteve excelentes propriedades (texturais e adsortivas), sendo eficiente para adsorção do corante azul de metileno. Palavras-chave: Ativação física; eucalipto; remoção de contaminantes.ABSTRACT Activated carbon is an adsorbent produced through the process of physical or chemical activation, giving rise to a material with high porosity and large surface area, fundamental for removing contaminants in the environment. Accordingly, this study aimed to produce activated carbon from Eucalyptus dunnii and apply this activated carbon to adsorption of methylene blue dye in aqueous medium. Thus, activated carbon was prepared by physical activation, using water vapor as the activating agent. Then, we realized characterizations related to the gravimetric yield in activated carbon (GYAC), surface area analysis (SBET), pore volume and diameter and scanning electron microscopy. The adsorption capacity was evaluated from kinetic studies and adsorption isotherms at different concentrations of dye and Langmuir and Freundlich isotherm models were applied. The material produced had 15% GYAC, SBET equal to 532.32 m 2 .g -1 and porous surface morphology. In addition, the material presented a maximum adsorption capacity (qm) for the methylene blue dye equal to 293.30 mg.g -1 , adjusting better to the Langmuir (monolayer) model. Therefore, we concluded that the material produced excellent properties (textural and adsorptive), being efficient for adsorption of methylene blue dye.

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Use of sawdust Eucalyptus sp. in the preparation of activated carbons

Cited by 32 publications

References 25 publications

Activated carbon from bamboo (<i>Bambusa vulgaris</i>) waste using CO2 as activating agent for adsorption of methylene blue and phenol

Activated carbon from bamboo (<i>Bambusa vulgaris</i>) waste using CO2 as activating agent for adsorption of methylene blue and phenol

Jatropha seed cake supplementation for improved fungal growth and later use as animal feed

Produção de carvão ativado a partir de Eucalyptus dunnii para adsorção de corante azul de metileno

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