Adsorbent ability of lignin-based activated carbons for the removal of p-nitrophenol from aqueous solutions

This paper reports the p-nitrophenol (PNP) removal from aqueous solutions by adsorption onto active carbons (ACs). Nine ACs were prepared from acid-precipitated eucalyptus kraft lignin following a two-step process consisting in CO 2 partial gasification (750-850°C) after carbonization (350-800°C) in...

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Detalles Bibliográficos
Autores: Cotoruelo, Luis M, Marqués, María D., Díaz, Francisco Javier, Rodríguez Mirasol, José, Rodríguez Jiménez, Juan José, Cordero, Tomás
Tipo de recurso: artículo
Fecha de publicación:2012
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/671578
Acceso en línea:http://hdl.handle.net/10486/671578
https://dx.doi.org/10.1016/j.cej.2012.01.026
Access Level:acceso abierto
Palabra clave:Kinetics
P-Nitrophenol
Thermodynamics
Química
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spelling Adsorbent ability of lignin-based activated carbons for the removal of p-nitrophenol from aqueous solutionsCotoruelo, Luis MMarqués, María D.Díaz, Francisco JavierRodríguez Mirasol, JoséRodríguez Jiménez, Juan JoséCordero, TomásKineticsP-NitrophenolThermodynamicsQuímicaThis paper reports the p-nitrophenol (PNP) removal from aqueous solutions by adsorption onto active carbons (ACs). Nine ACs were prepared from acid-precipitated eucalyptus kraft lignin following a two-step process consisting in CO 2 partial gasification (750-850°C) after carbonization (350-800°C) in N 2 atmosphere. The amount adsorbed ranged from 1 to 4.4mmol/g, and it is related to the initial concentration of adsorbate, temperature, pH, burn off of the activated carbons, and contact time. The equilibrium results were fitted by the Temkin, Dubinin-Radushkevich, and Guggenheim-Anderson-de Boer equations. The main thermodynamic magnitudes were estimated as well, and their values indicated that the adsorption processes were spontaneous and exothermic. The kinetic study showed that the processes are of apparent second order related to the concentrations of the empty active sites on the ACs surface. The values of the effective diffusivities have been calculated and they have suggested that the internal diffusion controls the net mass transfer. The results obtained in the present work can be for the benefit of the preparation of new adsorbents, as well as the primary design of the adsorption equipment with separation or environmental purposesThe authors acknowledge the Spanish DGICYT-MEC (Project CTQ 2009-14262)Elsevier B.V.Departamento de Química Física AplicadaFacultad de Ciencias20122012-03-01research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/671578https://dx.doi.org/10.1016/j.cej.2012.01.026reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/6715782026-06-23T12:46:27Z
dc.title.none.fl_str_mv Adsorbent ability of lignin-based activated carbons for the removal of p-nitrophenol from aqueous solutions
title Adsorbent ability of lignin-based activated carbons for the removal of p-nitrophenol from aqueous solutions
spellingShingle Adsorbent ability of lignin-based activated carbons for the removal of p-nitrophenol from aqueous solutions
Cotoruelo, Luis M
Kinetics
P-Nitrophenol
Thermodynamics
Química
title_short Adsorbent ability of lignin-based activated carbons for the removal of p-nitrophenol from aqueous solutions
title_full Adsorbent ability of lignin-based activated carbons for the removal of p-nitrophenol from aqueous solutions
title_fullStr Adsorbent ability of lignin-based activated carbons for the removal of p-nitrophenol from aqueous solutions
title_full_unstemmed Adsorbent ability of lignin-based activated carbons for the removal of p-nitrophenol from aqueous solutions
title_sort Adsorbent ability of lignin-based activated carbons for the removal of p-nitrophenol from aqueous solutions
dc.creator.none.fl_str_mv Cotoruelo, Luis M
Marqués, María D.
Díaz, Francisco Javier
Rodríguez Mirasol, José
Rodríguez Jiménez, Juan José
Cordero, Tomás
author Cotoruelo, Luis M
author_facet Cotoruelo, Luis M
Marqués, María D.
Díaz, Francisco Javier
Rodríguez Mirasol, José
Rodríguez Jiménez, Juan José
Cordero, Tomás
author_role author
author2 Marqués, María D.
Díaz, Francisco Javier
Rodríguez Mirasol, José
Rodríguez Jiménez, Juan José
Cordero, Tomás
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Química Física Aplicada
Facultad de Ciencias
dc.subject.none.fl_str_mv Kinetics
P-Nitrophenol
Thermodynamics
Química
topic Kinetics
P-Nitrophenol
Thermodynamics
Química
description This paper reports the p-nitrophenol (PNP) removal from aqueous solutions by adsorption onto active carbons (ACs). Nine ACs were prepared from acid-precipitated eucalyptus kraft lignin following a two-step process consisting in CO 2 partial gasification (750-850°C) after carbonization (350-800°C) in N 2 atmosphere. The amount adsorbed ranged from 1 to 4.4mmol/g, and it is related to the initial concentration of adsorbate, temperature, pH, burn off of the activated carbons, and contact time. The equilibrium results were fitted by the Temkin, Dubinin-Radushkevich, and Guggenheim-Anderson-de Boer equations. The main thermodynamic magnitudes were estimated as well, and their values indicated that the adsorption processes were spontaneous and exothermic. The kinetic study showed that the processes are of apparent second order related to the concentrations of the empty active sites on the ACs surface. The values of the effective diffusivities have been calculated and they have suggested that the internal diffusion controls the net mass transfer. The results obtained in the present work can be for the benefit of the preparation of new adsorbents, as well as the primary design of the adsorption equipment with separation or environmental purposes
publishDate 2012
dc.date.none.fl_str_mv 2012
2012-03-01
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/671578
https://dx.doi.org/10.1016/j.cej.2012.01.026
url http://hdl.handle.net/10486/671578
https://dx.doi.org/10.1016/j.cej.2012.01.026
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301603

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