title: Application of Fe-Cu binary oxide nanoparticles for the removal of hexavalent chromium from aqueous solution.
abstract: The adsorption process has been used as an effective technique for the removal of metal ions from aqueous solutions. Groundwater remediation by nanoparticles has received interest in recent years. In the present study, a binary metal oxide of Fe-Cu was prepared and used for the removal of hexavalent chromium from aqueous solution. Batch experiments were performed to investigate the effects of initial Cr (VI) concentration, dose of adsorbent, and pH of solution on the removal efficiency of Cr (VI). The prepared nanostructured Fe-Cu binary oxides were able to reduce the concentration of Cr (VI) in aqueous solution. Binary metal oxides nanoparticle exhibited an outstanding ability to remove Cr (VI) due to high surface area, low particle size, and high inherent activity. The percentage removal efficiency of Cr (VI) increased with nanoparticles doses (0.1 g L(-1)-2.5 g L(-1)), whereas it decreased with initial Cr (VI) concentration (1 mg L(-1)-25 mg L(-1)) and with pH (3-9). The Freundlich model was found to be the better fit for adsorption isotherm. The prepared nanomaterial was characterized using powder X-ray diffraction, scanning electron microscopy (SEM), and ultraviolet (UV)-visible spectroscopy. It showed that the Fe-Cu binary oxides were formed in single phase. SEM micrograph showed aggregates with many nano-sized particles. UV-visible spectroscopy showed quantum confinement effect.
authors.affiliation: Environmental Engineering Section, Department of Civil Engineering, Aligarh Muslim University, Aligarh 202002, India E-mail: saif07amu@gmail.com.
authors.forename: Saif Ullah
authors.initials: SU
authors.lastname: Khan
authors.affiliation: Department of Applied Physics, Aligarh Muslim University, Aligarh 202002, India.
authors.forename: Rumman
authors.initials: R
authors.lastname: Zaidi
authors.affiliation: Department of Petroleum Studies, Aligarh Muslim University, Aligarh 202002, India.
authors.forename: Saeikh Z
authors.initials: SZ
authors.lastname: Hassan
authors.affiliation: Environmental Engineering Section, Department of Civil Engineering, Aligarh Muslim University, Aligarh 202002, India E-mail: saif07amu@gmail.com.
authors.forename: I H
authors.initials: IH
authors.lastname: Farooqi
authors.affiliation: Department of Applied Physics, Aligarh Muslim University, Aligarh 202002, India.
authors.forename: Ameer
authors.initials: A
authors.lastname: Azam
mesh_terms: D000327:Adsorption; D002857:Chromium / Q000737:chemistry*; D060587:Groundwater / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry; D010087:Oxides / Q000737:chemistry; D010316:Particle Size; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D010087:Oxides; D014874:Water Pollutants, Chemical; D002857:Chromium; C074702:chromium hexavalent ion