title: Removal of Cu (II) and Pb (II) from Aqueous Solution using engineered Iron Oxide Nanoparticles.
abstract: Nano-sized Fe3O4and Fe2O3were synthesized using a precipitation method. The nanomaterials were tested as adsorbents for the removal of both Cu2+and Pb2+ions. The nanomaterials were characterized using X-ray powder diffraction to determine both the phase and the average grain size of the synthesized nanomaterials. Batch pH studies were performed to determine the optimum binding pH for both the Cu2+and Pb2+to the synthesized nanomaterials. The optimum binding was observed to occur at pH 4 and above. Time dependency studies for Cu2+and Pb2+showed the binding occurred within the first five minutes of contact and remained constant up to 2 hours of contact. Isotherm studies were utilized to determine the binding capacity of each of the nanomaterials for Cu2+and Pb2+. The binding capacity of Fe3O4with Cu2+and Pb2+were 37.04 mg/g and 166.67 mg/g, respectively. The binding capacities of the Fe2O3nanomaterials with Cu2+and Pb2+were determined to be 19.61 mg/g and 47.62 mg/g, respectively. In addition, interference studies showed no significant reduction in the binding of either Cu2+or Pb2+to the Fe3O4or Fe2O3nanomaterials in the presence of solutions containing the individual ions Na+, K+, Mg2+and Ca2+or a solution consisting of a combination of all the aforementioned cations in one solution.
authors.affiliation: Department of Chemistry, University of Texas Rio Grande Valley, 1201 W University Dr. Edinburg TX 78539.
authors.forename: Carlos
authors.initials: C
authors.lastname: Tamez
authors.affiliation: Department of Chemistry, University of Texas Rio Grande Valley, 1201 W University Dr. Edinburg TX 78539.
authors.forename: Rebecca
authors.initials: R
authors.lastname: Hernandez
authors.affiliation: Department of Chemistry, University of Texas Rio Grande Valley, 1201 W University Dr. Edinburg TX 78539.
authors.forename: J G
authors.initials: JG
authors.lastname: Parsons
keywords: Copper; ICP-OES; Lead; XRD; iron oxide nanomaterials; sorption
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