Synthesis, characterization of Fe3O4@glycine doped polypyrrole magnetic nanocomposites and their potential performance to remove toxic Cr(VI)
Journal of Industrial and Engineering Chemistry
Department of Applied Chemistry, University of Johannesburg, South Africa; Department of Polymer Science and Engineering, Inha University, Incheon, South Korea; Smart Polymers Group, Polymers and Composites (P andC), Materials Science and Manufacturing (MSM), Council for Scientific and Industrial Research (CSIR), Pretoria, South Africa; Department of Civil and Chemical Engineering, University of South Africa (UNISA), South Africa
Fe3O4 coated glycine doped polypyrrole magnetic nanocomposite (Fe3O4@gly-PPy NC) was prepared via coating of suspended Fe3O4 nanoparticles with gly-PPy. FE-SEM and HR-TEM images indicated that Fe3O4 nanoparticles were encapsulated by precipitating gly-PPy moieties. Chromium(VI) adsorption followed a Langmuir isotherm with maximum capacity of 238-303mg/g for a temperature range of 25-45°C at pH 2. The adsorption process was governed by the ionic interaction and the reduction of Cr(VI) to Cr(III) by the PPy moiety. Results showed that NCs are effective adsorbents for the removal of Cr(VI) from wastewater and can be separated by external magnetic field from the reactor. © 2014 The Korean Society of Industrial and Engineering Chemistry.
Amino acids; Polypyrroles; Hexavalent chromium; Magnetic nanocomposites; Adsorption