Adsorption of naphthenic acid using activated carbon from Orbignya phalerata shell

Detalhes bibliográficos
Autor(a) principal: Ferreira, Maria Eugênia de Oliveira
Data de Publicação: 2020
Outros Autores: Mônaco, Felipe Santos, Ostroski, Indianara Conceição
Tipo de documento: Artigo
Idioma: por
Título da fonte: Acta Brasiliensis (Online)
Texto Completo: http://revistas.ufcg.edu.br/ActaBra/index.php/actabra/article/view/279
Resumo: The petrochemical industry involves a process chain with great potential for pollution. The presence of naphthenic acids in oily wastewater causes environmental damage, harming various organisms. The objective of this study was to evaluate the adsorptive capacity of activated carbon derived from Orbignya phalerata (babaçu coconut) shells for the removal of a model naphthenic acid, 1,4-cyclohexanedicarboxylic acid. To do this, kinetics and adsorption isotherms were determined in a batch system. Acid adsorption kinetics in the adsorbent were relatively fast, reaching equilibrium after 60 minutes of contact. Kinetic data was better adjusted to the pseudo-second order model, revealing the chemisorption character of the contaminant adsorption process. Equilibrium data was adjusted according to the Langmuir and Freundlich models, and both presented good fit. Based on the equilibrium constant analysis, activated carbon has higher affinity as an adsorbate and the maximum retained amount of acid obtained experimentally was 417.0 mg g-1. Thus, the equilibrium data obtained for the system suggest that the adsorbent tested has promising outcomes in the removal of acid contaminants present in wastewater from oil refining processes.
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spelling Adsorption of naphthenic acid using activated carbon from Orbignya phalerata shell Adsorção de ácido naftênico pelo carvão ativado de casca de Orbignya phalerataThe petrochemical industry involves a process chain with great potential for pollution. The presence of naphthenic acids in oily wastewater causes environmental damage, harming various organisms. The objective of this study was to evaluate the adsorptive capacity of activated carbon derived from Orbignya phalerata (babaçu coconut) shells for the removal of a model naphthenic acid, 1,4-cyclohexanedicarboxylic acid. To do this, kinetics and adsorption isotherms were determined in a batch system. Acid adsorption kinetics in the adsorbent were relatively fast, reaching equilibrium after 60 minutes of contact. Kinetic data was better adjusted to the pseudo-second order model, revealing the chemisorption character of the contaminant adsorption process. Equilibrium data was adjusted according to the Langmuir and Freundlich models, and both presented good fit. Based on the equilibrium constant analysis, activated carbon has higher affinity as an adsorbate and the maximum retained amount of acid obtained experimentally was 417.0 mg g-1. Thus, the equilibrium data obtained for the system suggest that the adsorbent tested has promising outcomes in the removal of acid contaminants present in wastewater from oil refining processes.A indústria petroquímica envolve uma cadeia de processos com alto potencial poluidor. A presença de ácidos naftênicos em águas residuais oleosas causam danos ambientais, prejudicando diversos organismos. Esta pesquisa avaliou a capacidade adsortiva do carvão ativado de casca de Orbignya phalerata (coco babaçu), para a remoção de um ácido naftênico modelo, o ácido 1,4-ciclohexanodicarboxílico. Para tanto, foram determinadas as cinéticas e as isotermas de adsorção, em sistema batelada. A cinética de adsorção do ácido no adsorvente foi relativamente rápida, alcançando o equilíbrio com 60 minutos de contato. Os dados cinéticos foram melhor ajustados ao modelo de pseudo-segunda ordem, revelando o caráter quimiossortivo do processo de adsorção do contaminante. Os dados de equilíbrio apresentaram bom ajuste aos modelos de Langmuir e Freundlich. A partir da análise da constante de equilíbrio, o carvão ativado apresenta maior afinidade pelo adsorvato e a quantidade máxima retida de ácido foi de 417,0 mg g-1. Assim, os dados de equilíbrio obtidos para o sistema sugerem a sua indicação para o uso do adsorvente como promissor na remoção do contaminante ácido presente em águas residuais dos processos petroquímicos.  Universidade Federal de Campina Grande - UFCG2020-09-28info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://revistas.ufcg.edu.br/ActaBra/index.php/actabra/article/view/27910.22571/2526-4338279Acta Brasiliensis; Vol 4 No 3 (2020): Acta Brasiliensis; 173-177Acta Brasiliensis; Vol 4 No 3 (2020): Acta Brasiliensis; 173-177Acta Brasiliensis; Vol 4 No 3 (2020): Acta Brasiliensis; 173-1772526-43382526-432Xreponame:Acta Brasiliensis (Online)instname:Universidade Federal de Campina Grande (UFCG)instacron:UFCGporhttp://revistas.ufcg.edu.br/ActaBra/index.php/actabra/article/view/279/109Copyright (c) 2019 Acta Brasiliensisinfo:eu-repo/semantics/openAccessFerreira, Maria Eugênia de OliveiraMônaco, Felipe SantosOstroski, Indianara Conceição2021-07-12T20:03:35Zoai:ActaBra.revistas.ufcg.edu.br:article/279Revistahttp://revistas.ufcg.edu.br/ActaBraPUBhttp://revistas.ufcg.edu.br/ActaBra/index.php/actabra/oaiactabrasiliensis@gmail.com || actabrasiliensis@gmail.com2526-432X2526-4338opendoar:2021-07-12T20:03:35Acta Brasiliensis (Online) - Universidade Federal de Campina Grande (UFCG)false
dc.title.none.fl_str_mv Adsorption of naphthenic acid using activated carbon from Orbignya phalerata shell

Adsorção de ácido naftênico pelo carvão ativado de casca de Orbignya phalerata
title Adsorption of naphthenic acid using activated carbon from Orbignya phalerata shell
spellingShingle Adsorption of naphthenic acid using activated carbon from Orbignya phalerata shell
Ferreira, Maria Eugênia de Oliveira
title_short Adsorption of naphthenic acid using activated carbon from Orbignya phalerata shell
title_full Adsorption of naphthenic acid using activated carbon from Orbignya phalerata shell
title_fullStr Adsorption of naphthenic acid using activated carbon from Orbignya phalerata shell
title_full_unstemmed Adsorption of naphthenic acid using activated carbon from Orbignya phalerata shell
title_sort Adsorption of naphthenic acid using activated carbon from Orbignya phalerata shell
author Ferreira, Maria Eugênia de Oliveira
author_facet Ferreira, Maria Eugênia de Oliveira
Mônaco, Felipe Santos
Ostroski, Indianara Conceição
author_role author
author2 Mônaco, Felipe Santos
Ostroski, Indianara Conceição
author2_role author
author
dc.contributor.author.fl_str_mv Ferreira, Maria Eugênia de Oliveira
Mônaco, Felipe Santos
Ostroski, Indianara Conceição
description The petrochemical industry involves a process chain with great potential for pollution. The presence of naphthenic acids in oily wastewater causes environmental damage, harming various organisms. The objective of this study was to evaluate the adsorptive capacity of activated carbon derived from Orbignya phalerata (babaçu coconut) shells for the removal of a model naphthenic acid, 1,4-cyclohexanedicarboxylic acid. To do this, kinetics and adsorption isotherms were determined in a batch system. Acid adsorption kinetics in the adsorbent were relatively fast, reaching equilibrium after 60 minutes of contact. Kinetic data was better adjusted to the pseudo-second order model, revealing the chemisorption character of the contaminant adsorption process. Equilibrium data was adjusted according to the Langmuir and Freundlich models, and both presented good fit. Based on the equilibrium constant analysis, activated carbon has higher affinity as an adsorbate and the maximum retained amount of acid obtained experimentally was 417.0 mg g-1. Thus, the equilibrium data obtained for the system suggest that the adsorbent tested has promising outcomes in the removal of acid contaminants present in wastewater from oil refining processes.
publishDate 2020
dc.date.none.fl_str_mv 2020-09-28
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://revistas.ufcg.edu.br/ActaBra/index.php/actabra/article/view/279
10.22571/2526-4338279
url http://revistas.ufcg.edu.br/ActaBra/index.php/actabra/article/view/279
identifier_str_mv 10.22571/2526-4338279
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://revistas.ufcg.edu.br/ActaBra/index.php/actabra/article/view/279/109
dc.rights.driver.fl_str_mv Copyright (c) 2019 Acta Brasiliensis
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2019 Acta Brasiliensis
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Campina Grande - UFCG
publisher.none.fl_str_mv Universidade Federal de Campina Grande - UFCG
dc.source.none.fl_str_mv Acta Brasiliensis; Vol 4 No 3 (2020): Acta Brasiliensis; 173-177
Acta Brasiliensis; Vol 4 No 3 (2020): Acta Brasiliensis; 173-177
Acta Brasiliensis; Vol 4 No 3 (2020): Acta Brasiliensis; 173-177
2526-4338
2526-432X
reponame:Acta Brasiliensis (Online)
instname:Universidade Federal de Campina Grande (UFCG)
instacron:UFCG
instname_str Universidade Federal de Campina Grande (UFCG)
instacron_str UFCG
institution UFCG
reponame_str Acta Brasiliensis (Online)
collection Acta Brasiliensis (Online)
repository.name.fl_str_mv Acta Brasiliensis (Online) - Universidade Federal de Campina Grande (UFCG)
repository.mail.fl_str_mv actabrasiliensis@gmail.com || actabrasiliensis@gmail.com
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