Synthesis of eco-friendly lignin-betaine and its application for dye wastewater treatment

Yu Yang, Xin Zhou, Yinkui Jiang, Ying Ji, Xiangchen Fang (Corresponding Author), Yan Zhang (Corresponding Author)

Research output: Journal article publicationJournal articleAcademic researchpeer-review

3 Citations (Scopus)

Abstract

Lignin-based polymers have great potential for water treatment due to their environmental friendliness, biodegradability, and safety. Herein, lignin-betaine polymer (LB) was synthesized by Steglich esterification. The formation of ester groups between lignin and betaine was corroborated by Fourier transform-infrared spectroscopy (FT-IR), nuclear magnetic resonance hydrogen spectroscopy (NMR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), elemental analysis and thermogravimetric analysis (TGA). The LB was applied in the treatment of the methylene blue -containing wastewater, and demonstrated a dye removal rate of 98 %. Our study indicated that the dye removal was dominated by chemical adsorption. Moreover, the LB exhibited durable dye removal performance and maintained excellent reusability after four cycles. Collectively, the lignin-betaine polymer could provide an effective candidate for wastewater treatment, with specific potency for the removal of cationic dye.
Original languageEnglish
Article number116014
JournalIndustrial Crops and Products
Volume192
DOIs
Publication statusPublished - Feb 2023

Keywords

  • Lignin
  • Betaine
  • Water treatment
  • Methylene blue
  • Wastewater

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