Verma, Renu and Asthana, Anupama and Singh, Ajaya Kumar and Prasad, Surendra and Susan, Mohammed A. B. H. (2017) Novel glycine-functionalized magnetic nanoparticles entrapped calcium alginate beads for effective removal of lead. Microchemical Journal, 130 . pp. 168-178. ISSN 0026-265X
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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 re- moval 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 adsorp- tion 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 was 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 con- firmed 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.
| Item Type: | Journal Article |
|---|---|
| Uncontrolled Keywords: | Magnetic nanoparticles; Functionalization of nanoparticles; Calcium alginate beads; Pb(II) adsorption; Pb(II) removal |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Faculty of Science, Technology and Environment (FSTE) > School of Biological and Chemical Sciences |
| Depositing User: | Repo Editor |
| Date Deposited: | 26 Apr 2017 03:05 |
| Last Modified: | 26 Apr 2017 03:05 |
| URI: | https://repository.usp.ac.fj/id/eprint/9786 |
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