Adsorption of Cu2+ and Ni2+ by tripolyphosphate-crosslinked chitosan-modified montmorillonite

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

The adsorption of Cu2+ and Ni2+ on synthesized tripolyphosphate-crosslinked-chitosan-modified montmorillonite (TPP-crosslinked-CTS-modified MMT) was examined by kinetic and equilibrium studies. The adsorption followed a pseudo-second order kinetics. Based on the activation energies, chemisorption due to electron transfer between TPP-crosslinked-CTS-modified MMT and the Cu2+ and Ni2+ cations was concluded to be the rate-determining step. Equilibrium analysis for the adsorption of each cation shows a good fit to the Langmuir equation. The adsorption of metal cations onto TPP-crosslinked-CTS-modified MMT proceeds because of the cation adsorption capacity of MMT, complexation with CTS, and complexation with the crosslinking agent (TPP). The selectivity toward Cu2+ was high because of the selective adsorption of this cation by CTS.

Original languageEnglish
Pages (from-to)143-148
Number of pages6
JournalJournal of Solid State Chemistry
Volume277
DOIs
Publication statusPublished - 2019 Sep

Keywords

  • Adsorption
  • Chitosan-modified montmorillonite
  • Heavy metal ions
  • Tripolyphosphate-crosslinking

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Adsorption of Cu<sup>2+</sup> and Ni<sup>2+</sup> by tripolyphosphate-crosslinked chitosan-modified montmorillonite'. Together they form a unique fingerprint.

Cite this