Related Experiment Video
Updated: Apr 17, 2026

Preparation of Expanded Chitin Foams and their Use in the Removal of Aqueous Copper
Published on: February 27, 2021
Synthesis of ethylenediamine modified chitosan microspheres for removal of divalent and hexavalent ions
1Department of Post-Graduate Studies & Research in Chemistry, Mangalore University, Mangalagangothri, DK 574199, Karnataka, India.
Abstract:
Ethylenediamine modified chitosan was obtained in the form of microspheres by chemical crosslinking with gluteraldehyde and evaluated for the effective removal of metal ions. The present modification results in additional nitrogen centers which function as potential binding sites and the microsphere form enhances the specific surface area during adsorption of metal ions. The adsorbent was used in batch experiments to evaluate the adsorption of Cu(II), Zn(II), Pb(II) and Cr(VI) in a individual metal salt solutions. The samples exhibited highest affinity for Cu(II) and least for Cr(VI) ions. The adsorption data were interpreted based on Langmuir and Freundlich isotherm models. The maximum adsorption capacity obtained from Langmuir model is 60.9 mg g(-1). The modified microspheres can be regenerated with high efficiency, suggesting that this adsorbent is satisfactory to reuse.
Related Concept Videos
Extraction: Advanced Methods
Complexation Equilibria: The Chelate Effect
Masking and Demasking Agents
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on...
EDTA: Chemistry and Properties
EDTA: Auxiliary Complexing Reagents
Formation of Complex Ions

