Combination of carboxymethyl chitosan-coated magnetic nanoparticles and chitosan-citrate complex gel beads as a novel magnetic adsorbent.
Carbohydr Polym
; 131: 255-63, 2015 Oct 20.
Article
in En
| MEDLINE
| ID: mdl-26256183
ABSTRACT
Magnetic chitosan beads were synthesized by incorporating N,O-carboxymethyl chitosan-coated magnetic nanoparticles (NOCC-MNPs) into chitosan-citrate gel beads (CCGBs) for adsorbing Cu(II) ions. An increase of Cu(II) adsorption capacity was due to the combined chelation effects from the electron-donating functional groups in the CCGBs and NOCC-MNPs. Moreover, the paramagnetic susceptibility of Cu(II) citrate chelates could further improve the Cu(II) adsorption efficiency through the force of magnetic attraction. The adsorption data of the magnetic CCGBs fitted well with the Freundlich model, whereas the adsorption kinetics followed the pseudo-second-order kinetic model. The maximal adsorption capacity as estimated by the Langmuir model was 294.11mg/g. The adsorption thermodynamic parameters indicated that the involved process should be spontaneous and exothermic.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Chitosan
/
Magnetite Nanoparticles
/
Gels
/
Microspheres
Language:
En
Journal:
Carbohydr Polym
Year:
2015
Document type:
Article
Affiliation country:
Taiwan