Novel glycine-functionalized magnetic nanoparticles entrapped calcium alginate beads for effective removal of lead

Title
Novel glycine-functionalized magnetic nanoparticles entrapped calcium alginate beads for effective removal of lead
Author(s)
Dr. A. K. Singh
Issue Date
14-09-2016
Citation
-
Document Abstract
The magnetic Fe3O4 nanoparticles were functionalized with glycine at pH 6. The glycine functionalized magnetic nanoparticles (GFMNPS) were then entrapped into alginate polymer as beads and used as adsorbent for the removal of Pb(II) ions. The developed adsorbents were characterized by fourier transform infrared spectroscopy, vibrating sample magnetometer and scanning electron microscopic analysis. The surface of beads contain amino and carboxylate groups which make them effective adsorbents for the removal of Pb(II) ions. The adsorption of Pb(II) ions from aqueous solution was found to be highly pH dependent. 92.8% Pb(II) was removed just in 10 min. The kinetic data fitted well with pseudo second order model and the equilibrium reached in 100 min with 99.8% removal of Pb(II) ions from aqueous solution. The adsorption isotherm strictly followed Langmuir model with the maximum adsorption capacity of 555.5 mg/g of the adsorbent. The thermodynamic study confirmed that the adsorption was spontaneous and endothermic in nature. The adsorbent could be regenerated four times simply by 0.2 M HNO3 retaining 90% of the adsorption capacity. The synthesized adsorbent was found to be eco-friendly, cost-effective, efficient and superior over other polymer based adsorbents for removal of Pb(II) ions from aqueous solution.
Language
English
Document Year
2016
Subject Name
Chemistry
Publisher Name
Microchemical Journal
Rights :
All rights reserved at Author