TY - JOUR
T1 - Characterization and use of a lignin sample extracted from Eucalyptus grandis sawdust for the removal of methylene blue dye
AU - Cemin, Alexandra
AU - Ferrarini, Fabrício
AU - Poletto, Matheus
AU - Bonetto, Luis R.
AU - Bortoluz, Jordana
AU - Lemée, Laurent
AU - Guégan, Régis
AU - Esteves, Valdemar I.
AU - Giovanela, Marcelo
N1 - Funding Information:
The authors would like to thank Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES - Finance Code 001 ), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), CESAM ( UID/AMB/50017/2019 ), and FCT/MEC for their financial support.
Funding Information:
The authors would like to thank Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES - Finance Code 001), Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq), CESAM (UID/AMB/50017/2019), and FCT/MEC for their financial support. The NMR spectrometer is part of the National NMR Network (PTNMR) and is partially supported by Infrastructure Project No 022161 (co-financed by FEDER through COMPETE 2020, POCI and PORL, and FCT through PIDDAC).
Funding Information:
The NMR spectrometer is part of the National NMR Network (PTNMR) and is partially supported by Infrastructure Project No 022161 (co-financed by FEDER through COMPETE 2020, POCI and PORL , and FCT through PIDDAC).
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/2/15
Y1 - 2021/2/15
N2 - A lignin sample was extracted from Eucalyptus grandis sawdust, by the Klason method, and used as adsorbent for the removal of methylene blue (MB) from aqueous solutions. By using a set of complementary analytical tools, the lignin appeared to be constituted of oxygenated functional groups and aromatic moieties, while showing a specific surface area of 20 m2 g−1 and polydisperse particles. Different experimental conditions with various solid to liquid ratio, pH, as well as other external experimental parameters were investigated for the removal of MB by the lignin sample. The experimental adsorption data at the equilibrium were properly fitted by Langmuir model, while adsorption kinetical isotherms were correctly adjusted by the pseudo-second order model. The MB removal by lignin was spontaneous involving physisorption mechanisms leading to a saturation of the adsorption sites with a maximum adsorbed amount of about 32 mg g−1. The data acquired in this study also emphasized the interests to use lignin as potential adsorbent in the light of its properties for the removal of cationic dyes, including MB, with possible recycling and reuse cycles of lignin without any significant loss of its properties.
AB - A lignin sample was extracted from Eucalyptus grandis sawdust, by the Klason method, and used as adsorbent for the removal of methylene blue (MB) from aqueous solutions. By using a set of complementary analytical tools, the lignin appeared to be constituted of oxygenated functional groups and aromatic moieties, while showing a specific surface area of 20 m2 g−1 and polydisperse particles. Different experimental conditions with various solid to liquid ratio, pH, as well as other external experimental parameters were investigated for the removal of MB by the lignin sample. The experimental adsorption data at the equilibrium were properly fitted by Langmuir model, while adsorption kinetical isotherms were correctly adjusted by the pseudo-second order model. The MB removal by lignin was spontaneous involving physisorption mechanisms leading to a saturation of the adsorption sites with a maximum adsorbed amount of about 32 mg g−1. The data acquired in this study also emphasized the interests to use lignin as potential adsorbent in the light of its properties for the removal of cationic dyes, including MB, with possible recycling and reuse cycles of lignin without any significant loss of its properties.
KW - Adsorption
KW - Eucalyptus grandis lignin
KW - Methylene blue
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U2 - 10.1016/j.ijbiomac.2020.12.155
DO - 10.1016/j.ijbiomac.2020.12.155
M3 - Article
C2 - 33359804
AN - SCOPUS:85098583274
SN - 0141-8130
VL - 170
SP - 375
EP - 389
JO - International Journal of Biological Macromolecules
JF - International Journal of Biological Macromolecules
ER -