Conversion of Eragrostis plana Nees leaves to activated carbon by microwave-assisted pyrolysis for the removal of organic emerging contaminants from aqueous solutions
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/205139 |
Resumo: | Eragrostis plana Nees leaves, abundant lignocellulosic biomass, was used as carbon source for preparation of activated carbon, by using microwave-assisted pyrolysis and chemical activation. The novel activated carbon (MWEPN) was characterised by FTIR, CHN elemental analysis, Boehm’s titration method, TGA, SEM, N2 adsorption/desorption curves and pH of the point of zero charge (pHpzc). Afterwards, the adsorbent was successfully employed for adsorption of the two emerging contaminants (caffeine and 2-nitrophenol). The results indicated that MWEPN had a predominantly mesoporous structure with a high surface area of 1250 m2 g−1. FTIR analysis indicated the presence of carbonyl, hydroxyl and carboxylic groups on the surface of MWEPN. The Boehm analysis showed the existence of the high amount of acid moieties on the surface of activated carbon. Adsorption kinetic indicated that the system followed the Avrami fractional order at the optimal pH of 7. The equilibrium time was attained at 30 min. The Liu isotherm model better described the isothermal data. Based on the Liu isotherm, the maximum sorption capacities (Qmax) of caffeine and 2-nitrophenol adsorbed onto activated carbon at 25 °C were 235.5 and 255.8 mg g−1, respectively. |
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Cunha, Mariene RochefortLima, Éder CláudioCimirro, Nilton Fabiano Gelos MendesThue, Pascal SilasDias, Silvio Luis PereiraGelesky, Marcos AlexandreDotto, Guilherme LuizReis, Glaydson Simões dosPavan, Flávio André2020-01-31T04:11:57Z20180944-1344http://hdl.handle.net/10183/205139001096147Eragrostis plana Nees leaves, abundant lignocellulosic biomass, was used as carbon source for preparation of activated carbon, by using microwave-assisted pyrolysis and chemical activation. The novel activated carbon (MWEPN) was characterised by FTIR, CHN elemental analysis, Boehm’s titration method, TGA, SEM, N2 adsorption/desorption curves and pH of the point of zero charge (pHpzc). Afterwards, the adsorbent was successfully employed for adsorption of the two emerging contaminants (caffeine and 2-nitrophenol). The results indicated that MWEPN had a predominantly mesoporous structure with a high surface area of 1250 m2 g−1. FTIR analysis indicated the presence of carbonyl, hydroxyl and carboxylic groups on the surface of MWEPN. The Boehm analysis showed the existence of the high amount of acid moieties on the surface of activated carbon. Adsorption kinetic indicated that the system followed the Avrami fractional order at the optimal pH of 7. The equilibrium time was attained at 30 min. The Liu isotherm model better described the isothermal data. Based on the Liu isotherm, the maximum sorption capacities (Qmax) of caffeine and 2-nitrophenol adsorbed onto activated carbon at 25 °C were 235.5 and 255.8 mg g−1, respectively.application/pdfengEnvironmental Science and Pollution Research. Alemanha. Vol. 25, no. 23 (Aug. 2018), p. 23315-23327Carvão ativadoPirólise assistida por microondasContaminante emergenteCafeína2-NitrofenolConversion of Eragrostis plana Nees leaves to activated carbon by microwave-assisted pyrolysis for the removal of organic emerging contaminants from aqueous solutionsEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001096147.pdf.txt001096147.pdf.txtExtracted Texttext/plain63479http://www.lume.ufrgs.br/bitstream/10183/205139/2/001096147.pdf.txtf736d3c293ba0459ed4688c8bed6739cMD52ORIGINAL001096147.pdfTexto completo (inglês)application/pdf1657563http://www.lume.ufrgs.br/bitstream/10183/205139/1/001096147.pdfd0f8b64cfa2496dff342932bc3409ca9MD5110183/2051392020-12-05 05:26:23.494587oai:www.lume.ufrgs.br:10183/205139Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2020-12-05T07:26:23Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Conversion of Eragrostis plana Nees leaves to activated carbon by microwave-assisted pyrolysis for the removal of organic emerging contaminants from aqueous solutions |
title |
Conversion of Eragrostis plana Nees leaves to activated carbon by microwave-assisted pyrolysis for the removal of organic emerging contaminants from aqueous solutions |
spellingShingle |
Conversion of Eragrostis plana Nees leaves to activated carbon by microwave-assisted pyrolysis for the removal of organic emerging contaminants from aqueous solutions Cunha, Mariene Rochefort Carvão ativado Pirólise assistida por microondas Contaminante emergente Cafeína 2-Nitrofenol |
title_short |
Conversion of Eragrostis plana Nees leaves to activated carbon by microwave-assisted pyrolysis for the removal of organic emerging contaminants from aqueous solutions |
title_full |
Conversion of Eragrostis plana Nees leaves to activated carbon by microwave-assisted pyrolysis for the removal of organic emerging contaminants from aqueous solutions |
title_fullStr |
Conversion of Eragrostis plana Nees leaves to activated carbon by microwave-assisted pyrolysis for the removal of organic emerging contaminants from aqueous solutions |
title_full_unstemmed |
Conversion of Eragrostis plana Nees leaves to activated carbon by microwave-assisted pyrolysis for the removal of organic emerging contaminants from aqueous solutions |
title_sort |
Conversion of Eragrostis plana Nees leaves to activated carbon by microwave-assisted pyrolysis for the removal of organic emerging contaminants from aqueous solutions |
author |
Cunha, Mariene Rochefort |
author_facet |
Cunha, Mariene Rochefort Lima, Éder Cláudio Cimirro, Nilton Fabiano Gelos Mendes Thue, Pascal Silas Dias, Silvio Luis Pereira Gelesky, Marcos Alexandre Dotto, Guilherme Luiz Reis, Glaydson Simões dos Pavan, Flávio André |
author_role |
author |
author2 |
Lima, Éder Cláudio Cimirro, Nilton Fabiano Gelos Mendes Thue, Pascal Silas Dias, Silvio Luis Pereira Gelesky, Marcos Alexandre Dotto, Guilherme Luiz Reis, Glaydson Simões dos Pavan, Flávio André |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Cunha, Mariene Rochefort Lima, Éder Cláudio Cimirro, Nilton Fabiano Gelos Mendes Thue, Pascal Silas Dias, Silvio Luis Pereira Gelesky, Marcos Alexandre Dotto, Guilherme Luiz Reis, Glaydson Simões dos Pavan, Flávio André |
dc.subject.por.fl_str_mv |
Carvão ativado Pirólise assistida por microondas Contaminante emergente Cafeína 2-Nitrofenol |
topic |
Carvão ativado Pirólise assistida por microondas Contaminante emergente Cafeína 2-Nitrofenol |
description |
Eragrostis plana Nees leaves, abundant lignocellulosic biomass, was used as carbon source for preparation of activated carbon, by using microwave-assisted pyrolysis and chemical activation. The novel activated carbon (MWEPN) was characterised by FTIR, CHN elemental analysis, Boehm’s titration method, TGA, SEM, N2 adsorption/desorption curves and pH of the point of zero charge (pHpzc). Afterwards, the adsorbent was successfully employed for adsorption of the two emerging contaminants (caffeine and 2-nitrophenol). The results indicated that MWEPN had a predominantly mesoporous structure with a high surface area of 1250 m2 g−1. FTIR analysis indicated the presence of carbonyl, hydroxyl and carboxylic groups on the surface of MWEPN. The Boehm analysis showed the existence of the high amount of acid moieties on the surface of activated carbon. Adsorption kinetic indicated that the system followed the Avrami fractional order at the optimal pH of 7. The equilibrium time was attained at 30 min. The Liu isotherm model better described the isothermal data. Based on the Liu isotherm, the maximum sorption capacities (Qmax) of caffeine and 2-nitrophenol adsorbed onto activated carbon at 25 °C were 235.5 and 255.8 mg g−1, respectively. |
publishDate |
2018 |
dc.date.issued.fl_str_mv |
2018 |
dc.date.accessioned.fl_str_mv |
2020-01-31T04:11:57Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/205139 |
dc.identifier.issn.pt_BR.fl_str_mv |
0944-1344 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001096147 |
identifier_str_mv |
0944-1344 001096147 |
url |
http://hdl.handle.net/10183/205139 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Environmental Science and Pollution Research. Alemanha. Vol. 25, no. 23 (Aug. 2018), p. 23315-23327 |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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