Adsorption of diethyl phthalate (DEP) on activated carbon (AC) from green coconut shell: physical-chemical characterization and influence of operational parameters
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Research, Society and Development |
Texto Completo: | https://rsdjournal.org/index.php/rsd/article/view/21966 |
Resumo: | The physicochemical characterization of AC in the elimination of DEP in synthetic effluent was studied. Through the adsorption kinetics and isotherms, according to the factorial design of 11 tests and mathematical models, the influence of temperature, pH, and CA mass was verified. AC presented low surface area (554.228 m2 g-1), microporous area (460.0539 m2 g-1) and high microporous volume (0.253081 cm3 g-1) by the BET and BJH method, and due to activation, high basicity, pHPZC (7.2). Elemental and surface group analysis by the Boehm method revealed a predominance of basic groups (0.845 meq g-1), lactones (0.211 meq g-1) and phenols (0.169 meq g-1), confirmed by infrared spectroscopy (FTIR ) by the presence of quinone, lactone and carbonyl groups. The adsorption treatment presented higher coefficients of determination (R2 > 0.90) in the study of kinetics for the pseudo-second order model, and of isotherms for the Freundlinch model. AC presented an 83.5% DEP elimination rate, a DEP adsorption capacity of 27.006 mg g-1 at pH 7, with 0.4 g of AC at 30ºC in 360 minutes, however, it reduced by 13% its rate and 20.598 mg g-1 of adsorption capacity at pH 11, with 0.2 g of AC at 15ºC in 360 minutes. For the adsorption capacity and DEP elimination rate there was no significant difference in treatments with (p < 0.5). In the Thermogravimetric Analysis (TGA), the decomposition close to 600ºC, and by Scanning Electron Microscopy (SEM), the textural properties were maintained. |
id |
UNIFEI_42097cd5ff340af1a23706ae1f3e6e98 |
---|---|
oai_identifier_str |
oai:ojs.pkp.sfu.ca:article/21966 |
network_acronym_str |
UNIFEI |
network_name_str |
Research, Society and Development |
repository_id_str |
|
spelling |
Adsorption of diethyl phthalate (DEP) on activated carbon (AC) from green coconut shell: physical-chemical characterization and influence of operational parametersAdsorción de ftalato de dietilo (DEP) sobre carbono activado (CA) de la cáscara de coco verde: caracterización físico-química e influencia de los parámetros operativosAdsorção do dietil ftalato (DEP) em carvão ativado (CA) de casca de coco verde: caracterização físico-química e influência dos parâmetros operacionaisEfluenteDietil ftalatoCarvão ativadoCatalisadorCapacidade de adsorção.EfluenteFtalato de dietiloCarbón activadoCatalizadorCapacidad de adsorción.EffluentDiethyl phthalateActivated carbonCatalystAdsorption capacity.The physicochemical characterization of AC in the elimination of DEP in synthetic effluent was studied. Through the adsorption kinetics and isotherms, according to the factorial design of 11 tests and mathematical models, the influence of temperature, pH, and CA mass was verified. AC presented low surface area (554.228 m2 g-1), microporous area (460.0539 m2 g-1) and high microporous volume (0.253081 cm3 g-1) by the BET and BJH method, and due to activation, high basicity, pHPZC (7.2). Elemental and surface group analysis by the Boehm method revealed a predominance of basic groups (0.845 meq g-1), lactones (0.211 meq g-1) and phenols (0.169 meq g-1), confirmed by infrared spectroscopy (FTIR ) by the presence of quinone, lactone and carbonyl groups. The adsorption treatment presented higher coefficients of determination (R2 > 0.90) in the study of kinetics for the pseudo-second order model, and of isotherms for the Freundlinch model. AC presented an 83.5% DEP elimination rate, a DEP adsorption capacity of 27.006 mg g-1 at pH 7, with 0.4 g of AC at 30ºC in 360 minutes, however, it reduced by 13% its rate and 20.598 mg g-1 of adsorption capacity at pH 11, with 0.2 g of AC at 15ºC in 360 minutes. For the adsorption capacity and DEP elimination rate there was no significant difference in treatments with (p < 0.5). In the Thermogravimetric Analysis (TGA), the decomposition close to 600ºC, and by Scanning Electron Microscopy (SEM), the textural properties were maintained.Se estudió la caracterización fisicoquímica de CA en la eliminación de DEP en efluentes sintéticos. A través de la cinética de adsorción y las isotermas, de acuerdo con el diseño factorial de 11 pruebas y modelos matemáticos, se verificó la influencia de la temperatura, el pH y la masa de CA. CA presentó baja área superficial (554, 228 m2 g-1), área microporosa (460.0539 m2 g-1) y alto volumen microporoso (0.253081 cm3 g-1) por el método BET y BJH, y debido a la activación, alta basicidad, pHPZC (7,2). El análisis elemental y los grupos funcionales superficiales por el método de Boehm reveló un predominio de grupos básicos (0,845 meq g-1), lactonas (0,211 meq g-1) y fenoles (0,169 meq g-1), confirmado por espectroscopia infrarroja (FTIR) por la presencia de grupos quinona, lactona y carbonilo. El tratamiento de adsorción presentó mayores coeficientes de determinación (R2 > 0.90) en el estudio de cinética para el modelo de pseudo-segundo orden, y de isotermas para el modelo de Freundlinch. CA presentó una tasa de eliminación de DEP de 83.5%, una capacidad de adsorción de DEP de 27.006 mg g-1 a pH 7, con 0.4 g de CA a 30ºC en 360 minutos, sin embargo, redujo en 13% su tasa y 20.598 mg g-1 de capacidad de adsorción a pH 11, con 0,2 g de CA a 15ºC en 360 minutos. Para la capacidad de adsorción de DEP y la tasa de eliminación no hubo diferencias significativas en los tratamientos con (p < 0.5). En el Análisis Termogravimétrico (ATG), la descomposición cercana a 600ºC, y por Microscopía Electrónica de Barrido (MEB), se mantuvieron las propiedades texturales.A caracterização físico-química do CA na eliminação de DEP em efluente sintético foi estudada. Através das cinéticas e isotermas de adsorção, conforme delineamento fatorial de 11 ensaios e modelos matemáticos, verificou-se a influência da temperatura, pH, massa do CA. CA apresentou baixa área superficial (554, 228 m2 g-1), área microporosa (460,0539 m2 g-1) e volume microporoso elevado (0,253081 cm3 g-1) pelo método de BET e BJH, e devido a ativação, elevada basicidade, pHPZC (7,2). A análise elementar e dos grupos funcionais da superfície pelo método de Boehm revelaram predominância de grupos básicos (0,845 meq g-1), lactonas (0,211 meq g-1) e fenóis (0,169 meq g-1), confirmado na espectroscopia no infravermelho (IRTF) pela presença de grupamentos quinona, lactona e carbonila. O tratamento de adsorção apresentou superiores coeficientes de determinação (R2 > 0,90) no estudo das cinéticas para o modelo de pseudo-segunda ordem, e das isotermas, para o de Freundlinch. O CA apresentou, 83,5% de taxa de eliminação de DEP, uma capacidade de adsorção de DEP de 27,006 mg g-1 em pH 7, com 0,4 g de CA a 30ºC em 360 minutos, entretanto, reduziu em 13% a sua taxa e 20,598 mg g-1 de capacidade de adsorção em pH 11, com 0,2 g de CA a 15ºC em 360 minutos. Para a capacidade de adsorção e taxa de eliminaçao de DEP não ocorreu diferença significativa nos tratamentos com (p < 0,5). Na Análise Termogravimétrica (ATG), a decomposição próximo a 600ºC, e pela Microscopia Eletrônica de Varredura (MEV), as propriedades texturais foram mantidas.Research, Society and Development2021-11-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://rsdjournal.org/index.php/rsd/article/view/2196610.33448/rsd-v10i14.21966Research, Society and Development; Vol. 10 No. 14; e289101421966Research, Society and Development; Vol. 10 Núm. 14; e289101421966Research, Society and Development; v. 10 n. 14; e2891014219662525-3409reponame:Research, Society and Developmentinstname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEIporhttps://rsdjournal.org/index.php/rsd/article/view/21966/19597Copyright (c) 2021 Maria Carolina de Almeida; Fernando Pereira de Sá; Juilão Pereira; Tatianne Ferreira de Oliveirahttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessAlmeida, Maria Carolina de Sá, Fernando Pereira de Pereira, JuilãoOliveira, Tatianne Ferreira de 2021-12-04T11:48:39Zoai:ojs.pkp.sfu.ca:article/21966Revistahttps://rsdjournal.org/index.php/rsd/indexPUBhttps://rsdjournal.org/index.php/rsd/oairsd.articles@gmail.com2525-34092525-3409opendoar:2024-01-17T09:41:15.742003Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)false |
dc.title.none.fl_str_mv |
Adsorption of diethyl phthalate (DEP) on activated carbon (AC) from green coconut shell: physical-chemical characterization and influence of operational parameters Adsorción de ftalato de dietilo (DEP) sobre carbono activado (CA) de la cáscara de coco verde: caracterización físico-química e influencia de los parámetros operativos Adsorção do dietil ftalato (DEP) em carvão ativado (CA) de casca de coco verde: caracterização físico-química e influência dos parâmetros operacionais |
title |
Adsorption of diethyl phthalate (DEP) on activated carbon (AC) from green coconut shell: physical-chemical characterization and influence of operational parameters |
spellingShingle |
Adsorption of diethyl phthalate (DEP) on activated carbon (AC) from green coconut shell: physical-chemical characterization and influence of operational parameters Almeida, Maria Carolina de Efluente Dietil ftalato Carvão ativado Catalisador Capacidade de adsorção. Efluente Ftalato de dietilo Carbón activado Catalizador Capacidad de adsorción. Effluent Diethyl phthalate Activated carbon Catalyst Adsorption capacity. |
title_short |
Adsorption of diethyl phthalate (DEP) on activated carbon (AC) from green coconut shell: physical-chemical characterization and influence of operational parameters |
title_full |
Adsorption of diethyl phthalate (DEP) on activated carbon (AC) from green coconut shell: physical-chemical characterization and influence of operational parameters |
title_fullStr |
Adsorption of diethyl phthalate (DEP) on activated carbon (AC) from green coconut shell: physical-chemical characterization and influence of operational parameters |
title_full_unstemmed |
Adsorption of diethyl phthalate (DEP) on activated carbon (AC) from green coconut shell: physical-chemical characterization and influence of operational parameters |
title_sort |
Adsorption of diethyl phthalate (DEP) on activated carbon (AC) from green coconut shell: physical-chemical characterization and influence of operational parameters |
author |
Almeida, Maria Carolina de |
author_facet |
Almeida, Maria Carolina de Sá, Fernando Pereira de Pereira, Juilão Oliveira, Tatianne Ferreira de |
author_role |
author |
author2 |
Sá, Fernando Pereira de Pereira, Juilão Oliveira, Tatianne Ferreira de |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Almeida, Maria Carolina de Sá, Fernando Pereira de Pereira, Juilão Oliveira, Tatianne Ferreira de |
dc.subject.por.fl_str_mv |
Efluente Dietil ftalato Carvão ativado Catalisador Capacidade de adsorção. Efluente Ftalato de dietilo Carbón activado Catalizador Capacidad de adsorción. Effluent Diethyl phthalate Activated carbon Catalyst Adsorption capacity. |
topic |
Efluente Dietil ftalato Carvão ativado Catalisador Capacidade de adsorção. Efluente Ftalato de dietilo Carbón activado Catalizador Capacidad de adsorción. Effluent Diethyl phthalate Activated carbon Catalyst Adsorption capacity. |
description |
The physicochemical characterization of AC in the elimination of DEP in synthetic effluent was studied. Through the adsorption kinetics and isotherms, according to the factorial design of 11 tests and mathematical models, the influence of temperature, pH, and CA mass was verified. AC presented low surface area (554.228 m2 g-1), microporous area (460.0539 m2 g-1) and high microporous volume (0.253081 cm3 g-1) by the BET and BJH method, and due to activation, high basicity, pHPZC (7.2). Elemental and surface group analysis by the Boehm method revealed a predominance of basic groups (0.845 meq g-1), lactones (0.211 meq g-1) and phenols (0.169 meq g-1), confirmed by infrared spectroscopy (FTIR ) by the presence of quinone, lactone and carbonyl groups. The adsorption treatment presented higher coefficients of determination (R2 > 0.90) in the study of kinetics for the pseudo-second order model, and of isotherms for the Freundlinch model. AC presented an 83.5% DEP elimination rate, a DEP adsorption capacity of 27.006 mg g-1 at pH 7, with 0.4 g of AC at 30ºC in 360 minutes, however, it reduced by 13% its rate and 20.598 mg g-1 of adsorption capacity at pH 11, with 0.2 g of AC at 15ºC in 360 minutes. For the adsorption capacity and DEP elimination rate there was no significant difference in treatments with (p < 0.5). In the Thermogravimetric Analysis (TGA), the decomposition close to 600ºC, and by Scanning Electron Microscopy (SEM), the textural properties were maintained. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-11-02 |
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 |
https://rsdjournal.org/index.php/rsd/article/view/21966 10.33448/rsd-v10i14.21966 |
url |
https://rsdjournal.org/index.php/rsd/article/view/21966 |
identifier_str_mv |
10.33448/rsd-v10i14.21966 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://rsdjournal.org/index.php/rsd/article/view/21966/19597 |
dc.rights.driver.fl_str_mv |
https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Research, Society and Development |
publisher.none.fl_str_mv |
Research, Society and Development |
dc.source.none.fl_str_mv |
Research, Society and Development; Vol. 10 No. 14; e289101421966 Research, Society and Development; Vol. 10 Núm. 14; e289101421966 Research, Society and Development; v. 10 n. 14; e289101421966 2525-3409 reponame:Research, Society and Development instname:Universidade Federal de Itajubá (UNIFEI) instacron:UNIFEI |
instname_str |
Universidade Federal de Itajubá (UNIFEI) |
instacron_str |
UNIFEI |
institution |
UNIFEI |
reponame_str |
Research, Society and Development |
collection |
Research, Society and Development |
repository.name.fl_str_mv |
Research, Society and Development - Universidade Federal de Itajubá (UNIFEI) |
repository.mail.fl_str_mv |
rsd.articles@gmail.com |
_version_ |
1797052819374604288 |