Nickel adsorption by magnetic alginate microcapsules containing an extractant. - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Water Research Année : 2006

Nickel adsorption by magnetic alginate microcapsules containing an extractant.

Résumé

The adsorption of heavy metals on biomaterials was investigated by studying the potential of alginate microcapsules contg. an extractant (Cyanex 272) and magnetic nanoparticles (g-Fe2O3) for the adsorption of Ni(II) from aq. solns. A two-stage kinetic behavior was obsd. with 70% of the max. sorption capacity achieved within 8 h. An increase in Ni removal with increase in pH occurred, the max. uptake capacity being »0.42 mmol g-1 at pH 8. The adsorption isotherm (pH »5.3) was obtained in a wide range of initial Ni concns.; the exptl. data were fitted by a Langmuir model and the q max value was estd. to be 0.52 mmol g-1. Moreover, including magnetic particles in the microcapsules allowed easy isolation of the beads from the aq. solns. after the sorption process. Magnetic microcapsules are then suitable for the development of efficient biosorbents for removal and recovery of heavy metals from wastewater using magnetic sepn.

Domaines

Matériaux
Fichier non déposé

Dates et versions

hal-00164998 , version 1 (24-07-2007)

Identifiants

  • HAL Id : hal-00164998 , version 1

Citer

Audrey-Flore Ngomsik, Agnes Bee, Jean-Michel Siaugue, Valérie Cabuil, Gérard Cote. Nickel adsorption by magnetic alginate microcapsules containing an extractant.. Water Research, 2006, 40 (9), pp.1848-1856. ⟨hal-00164998⟩
156 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More