Characterization and use of a lignin sample extracted from Eucalyptus grandis sawdust for the removal of methylene blue dye

Alexandra Cemin, Fabrício Ferrarini, Matheus Poletto, Luis R. Bonetto, Jordana Bortoluz, Laurent Lemée, Régis Guégan, Valdemar I. Esteves, Marcelo Giovanela

研究成果: Article査読

5 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)375-389
ページ数15
ジャーナルInternational Journal of Biological Macromolecules
170
DOI
出版ステータスPublished - 2021 2 15

ASJC Scopus subject areas

  • 構造生物学
  • 生化学
  • 分子生物学
  • 経済学、計量経済学
  • エネルギー(全般)

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