Binary pectin-chitosan composites for the uptake of lanthanum and yttrium species in aqueous media

Dexu Kong, Eny Kusrini, Lee D. Wilson

Research output: Contribution to journalArticlepeer-review

Abstract

Rare-earth elements such as lanthanum and yttrium have wide utility in high-tech applications such as permanent magnets and batteries. The use of biopolymers and their composites as adsorbents for La (III) and Y (III) ions were investigated as a means to increase the uptake capac-ity. Previous work has revealed that composite materials with covalent frameworks that contain biopolymers such as pectin and chitosan have secondary adsorption sites for enhanced adsorption. Herein, the maximum adsorption capacity of a 5:1 Pectin-Chitosan composite with La (III) and Y (III) was 22 mg/g and 23 mg/g, respectively. Pectin-Chitosan composites of variable composition were characterized by complementary methods: spectroscopy (FTIR,13 C solids NMR), TGA, and zeta potential. This work contributes to the design of covalent Pectin-Chitosan biopolymer frameworks for the controlled removal of La (III) and Y (III) from aqueous media.

Original languageEnglish
Article number478
JournalMicromachines
Volume12
Issue number5
DOIs
Publication statusPublished - May 2021

Keywords

  • Adsorption
  • Chitosan-pectin
  • Composites
  • Lanthanum
  • Rare earth elements
  • Yttrium

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