Lignin/Chitin Films and Their Adsorption Characteristics for Heavy Metal Ions

Yaqing Duan, Auriane Freyburger, Werner Kunz, Cordt Zollfrank

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

This study presents the fabrication of novel lignin/chitin films from a solvent system composed of the ionic liquid 1-butyl-3-methylimidazolium acetate and γ-valerolactone as a biosourced cosolvent. Scanning electron microscopy and attentuated total reflectance Fourier transform infrared spectroscopy confirmed the successful preparation of the lignin/chitin films. The application of lignin/chitin film as an adsorbent for Fe(III) and Cu(II) cation uptake from aqueous solutions is discussed. It was observed that the maximum adsorption capacity for Fe(III) was 84 wt % and for Cu(II) was 22 wt % within 48 h. The lignin/chitin films could be regenerated by desorption of the Fe(III) and Cu(II) ions. Up to 12 and 46 wt %, respectively, could be released within 48 h by directly soaking the metal ion loaded film within water at room temperature. The lignin/chitin film can be considered as a stable and recyclable bioadsorbent material with a high adsorption metal ion capacity for water purification.

Original languageEnglish
Pages (from-to)6965-6973
Number of pages9
JournalACS Sustainable Chemistry and Engineering
Volume6
Issue number5
DOIs
StatePublished - 7 May 2018

Keywords

  • biofilm sorbent
  • chitin
  • desorption
  • heavy metal adsorption
  • ionic liquids
  • lignin

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