title: Fabrication of glycine-functionalized maghemite nanoparticles for magnetic removal of copper from wastewater.
abstract: 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 Cu(2+) 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 Cu(2+) of 625mg/g. Furthermore, these nanoadsorbents can be used as highly efficient separable and reusable materials for removal of toxic metal ions.
authors.affiliation: Universidade de Brasília, Faculdade de Ceilândia, Centro Metropolitano Conjunto A Lote 1, Ceilândia, DF, CEP 72220-900, Brazil.
authors.forename: Natálie C
authors.initials: NC
authors.lastname: Feitoza
authors.affiliation: Universidade de Brasília, Faculdade de Ceilândia, Centro Metropolitano Conjunto A Lote 1, Ceilândia, DF, CEP 72220-900, Brazil.
authors.forename: Thamires D
authors.initials: TD
authors.lastname: Gonçalves
authors.affiliation: Universidade de Brasília, Faculdade de Ceilândia, Centro Metropolitano Conjunto A Lote 1, Ceilândia, DF, CEP 72220-900, Brazil.
authors.forename: Jéssica J
authors.initials: JJ
authors.lastname: Mesquita
authors.affiliation: Universidade de Brasília, Faculdade de Ceilândia, Centro Metropolitano Conjunto A Lote 1, Ceilândia, DF, CEP 72220-900, Brazil.
authors.forename: Jucely S
authors.initials: JS
authors.lastname: Menegucci
authors.affiliation: Universidade de Brasília, Faculdade de Ceilândia, Centro Metropolitano Conjunto A Lote 1, Ceilândia, DF, CEP 72220-900, Brazil.
authors.forename: Mac-Kedson M S
authors.initials: MK
authors.lastname: Santos
authors.affiliation: Universidade de Brasília, Faculdade de Ceilândia, Centro Metropolitano Conjunto A Lote 1, Ceilândia, DF, CEP 72220-900, Brazil.
authors.forename: Juliano A
authors.initials: JA
authors.lastname: Chaker
authors.affiliation: Universidade de Brasília, Instituto de Química, CP 04478, Brasília, DF, CEP 70919-970, Brazil.
authors.forename: Ricardo B
authors.initials: RB
authors.lastname: Cunha
authors.affiliation: Universidade de Brasília, Instituto de Química, CP 04478, Brasília, DF, CEP 70919-970, Brazil.
authors.forename: Anderson M M
authors.initials: AM
authors.lastname: Medeiros
authors.affiliation: Universidade de Brasília, Instituto de Química, CP 04478, Brasília, DF, CEP 70919-970, Brazil.
authors.forename: Joel C
authors.initials: JC
authors.lastname: Rubim
authors.affiliation: Universidade de Brasília, Faculdade de Ceilândia, Centro Metropolitano Conjunto A Lote 1, Ceilândia, DF, CEP 72220-900, Brazil. Electronic address: mhsousa@unb.br.
authors.forename: Marcelo H
authors.initials: MH
authors.lastname: Sousa
mesh_terms: D003300:Copper / Q000302:isolation & purification*; D005290:Ferric Compounds / Q000737:chemistry*; D005998:Glycine / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D003300:Copper; D005290:Ferric Compounds; D005998:Glycine; D062065:Wastewater; D014874:Water Pollutants, Chemical; C000499:ferric oxide
keywords: Copper adsorption; Glycine-functionalized; Magnetic nanoparticles; Wastewater