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)


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
Publication statusPublished - Feb 2023


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


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