Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 264, Issue -, Pages 153-160Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2013.11.022
Keywords
Magnetic nanoparticles; Glycine-functionalized; Wastewater; Copper adsorption
Categories
Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Fundacao de Apoio a Pesquisa do Distrito Federal (FAPDF)
- CNPq
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Maghemite nanoparticles (MNPs) were functionalized with glycine, by a cost-effective and environmentally friendly procedure, as an alternative route to typical amine-functionalized polymeric coatings, for highly efficient removal of copper ions from water. MNPs were synthesized by co-precipitation method and adsorption of glycine was investigated as a function of ligand concentration and pH. The efficiency of these functionalized nanoparticles for removal of Cu2+ from water has been explored and showed that adsorption is highly dependent of pH and that it occurs either by forming chelate complexes and/or by electrostatic interaction. The adsorption process, which reaches equilibrium in few minutes and fits a pseudo second-order model, follows the Langmuir adsorption model with a very high maximum adsorption capacity for Cu2+ of 625 mg/g. Furthermore, these nanoadsorbents can be used as highly efficient separable and reusable materials for removal of toxic metal ions. (C) 2013 Elsevier B.V. All rights reserved.
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