469744 Nitrogen Doped Magnetic Carbon Nanocomposits Synthesized from Melamine with Enhanced Cr(VI) Removal

Wednesday, November 16, 2016: 4:24 PM
Union Square 14 (Hilton San Francisco Union Square)
Dr. Yonghai Cao, Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN, Jiangnan Huang Jr., University of Tennessee, Knoxville, TN and Zhanhu Guo, Integrated Composites Laboratory (ICL), Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN

With the growth in various industries, such as metal cleaning, electroplating, pigment, mining and leather processing, heavy metals (Cr, Cd, Hg, Pd and As) have become a widespread pollutant in the surface water and groundwater. Cr(VI), a typical heavy metal ions, is a commonly identified contaminant because of its high toxicity and mobility. Recently, magnetic carbon nanocomposites with large specific surface area were introduced to remove the heavy metal in the wastewater and displayed the excellent efficiency. In this work, we successfully synthesized the novel nitrogen doped carbon composites with higher magnetism and specific surface areas using melamine as carbon and nitrogen source through a simple pyrolysis method. After that, we utilized the as-synthesized materials to treat the Cr(VI) solution, and found that the excellent performance were observed (removal capacity: 29.46 mg/g, pH at 7; 2001 mg/g, pH at 1), which can be attributed to the nitrogen dopant and the iron nanoparticles on the surface. The nitrogen dopant on the carbon surface can increase its negative charge density and then enhance the ability for the adsorption of Cr(VI) ions. These results demonstrated that nitrogen doped magnetic carbon nanocomposites are the promising materials for the environmental remediation.

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See more of this Session: Water Sustainability and Integrated Water Resource Management
See more of this Group/Topical: Environmental Division