Designing of modified ion-imprinted chitosan particles for selective removal of mercury (II) ions

Amira K Hajri; Bassem Jamoussi; Aishah E Albalawi; Ohud H N Alhawiti; Amal A Alsharif

doi:10.1016/j.carbpol.2022.119207

Designing of modified ion-imprinted chitosan particles for selective removal of mercury (II) ions

Carbohydr Polym. 2022 Jun 15:286:119207. doi: 10.1016/j.carbpol.2022.119207. Epub 2022 Feb 8.

Authors

Amira K Hajri¹, Bassem Jamoussi², Aishah E Albalawi³, Ohud H N Alhawiti⁴, Amal A Alsharif⁴

Affiliations

¹ Department of Chemistry, University College Alwajh, University of Tabuk, 71421, Saudi Arabia; University of Monastir, Faculty of Sciences, Laboratory of Asymmetric Synthesis, Molecular Engineering of Materials for Electronic Organics (LR18ES19), 5019 Monastir, Tunisia. Electronic address: ahejari@ut.edu.sa.
² Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, Saudi Arabia.
³ Department of Biology, Faculty of Science, University of Tabuk, Tabuk 47913, Saudi Arabia.
⁴ Department of Chemistry, University College Alwajh, University of Tabuk, 71421, Saudi Arabia.

PMID: 35337492
DOI: 10.1016/j.carbpol.2022.119207

Abstract

Ion-imprinting methodology was utilized in the fabrication of mercury ion-imprinted sorbent derived from modified chitosan derivatives. The Schiff base ligand was first derived from 4-amino-3-hydroxybenzoic acid and 2-pyridinecarboxaldehyde (HPB) and then incorporated with chitosan via amide bonds. The obtained modified chitosan polymeric ligand (PBCS) was combined with Hg(II) ions to produce the corresponding polymeric complex and the imprinting was then achieved upon the glutaraldehyde cross-linking and eliminating the incorporated Hg(II) ions to finally have the Hg(II) ion-imprinted sorbent material (Hg-PBCS). The materials have been investigated using various techniques such as NMR and FTIR and the obtained sorbent was examined to evaluate its selective affinity to capture the target Hg(II) ions. The developed Hg-PBCS sorbent exhibited a higher tendency toward the targeted Hg(II) ions compared to the control non-imprinted sorbent particle (NI-PBCS) with a maximum capacity of 315 mg/g. Also, the sorbent displayed relatively rapid adsorption kinetics that best correlated with the pseudo-second-order model.

Keywords: Chitosan; Ion-imprinting; Mercury(II) ions; Schiff base.