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Highly effective adsorption of caffeine by a novel activated carbon prepared from coconut leaf.
Oliveira, Elvio N; Meneses, Alex T; de Melo, Samara F; Dias, Franciele M R; Perazzini, Maisa T B; Perazzini, Hugo; Meili, Lucas; Soletti, João I; Carvalho, Sandra H V; Bispo, Mozart D.
Afiliação
  • Oliveira EN; Laboratory of Separation Systems and Process Optimization (LASSOP), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil.
  • Meneses AT; Laboratory of Separation Systems and Process Optimization (LASSOP), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil.
  • de Melo SF; Laboratory of Separation Systems and Process Optimization (LASSOP), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil.
  • Dias FMR; Laboratory of Separation Systems and Process Optimization (LASSOP), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil.
  • Perazzini MTB; Institute of Natural Resources, Federal University of Itajubá-UNIFEI, Itajubá, MG, Brazil.
  • Perazzini H; Institute of Natural Resources, Federal University of Itajubá-UNIFEI, Itajubá, MG, Brazil.
  • Meili L; Laboratory of Processes (LAPRO), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil.
  • Soletti JI; Laboratory of Separation Systems and Process Optimization (LASSOP), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil.
  • Carvalho SHV; Laboratory of Separation Systems and Process Optimization (LASSOP), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil.
  • Bispo MD; Laboratory of Separation Systems and Process Optimization (LASSOP), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil. mozartdaltro@hotmail.com.
Environ Sci Pollut Res Int ; 29(33): 50661-50674, 2022 Jul.
Article em En | MEDLINE | ID: mdl-35235121
The disposal of coconut wastes is costly and damaging to the environment, but its uses are advantageous activated carbons production. Coconut leaves waste were used for activated carbon production by pyrolysis at 500° C and activation with potassium carbonate. The activated carbon was used for caffeine removal from aqueous solution. The coconut leaves activated carbon showed a predominantly amorphous structure from X-ray diffraction analysis and a pH at the zero charge point of 7.9. From the N2 adsorption/desorption method, the adsorbent showed a predominance of mesopores, with average pore size of 45.48 ηm and a surface area of 678.03 m2/g. From kinetic studies the data followed the pseudo-second order, where the intraparticle diffusion can be neglected. The adsorption isotherms were satisfactorily adjusted for the Redlich-Peterson model and a type curve L was identified. The thermodynamic parameters showed that adsorption occurred spontaneously, was exothermic and governed by physical adsorption. The artificial neural networks developed were capable of predicting both kinetics and equilibrium adsorption data under different operating conditions and was comparable to the traditional models available in literature in the training experiments, encouraging its use for data generalization when an efficient dataset is used. In conclusion, coconut leaves waste showed to be a promising feedstock to produce activated carbon aiming caffeine removal from water and wastewater.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Purificação da Água Tipo de estudo: Prognostic_studies Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha
Texto completo
Adicionar na Minha BVS
Imprimir
XML
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Purificação da Água Tipo de estudo: Prognostic_studies Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha