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Polypyrrole Coating via Lemieux-von Rudloff Oxidation on Magnetite Nanoparticles for Highly Efficient Removal of Chromium(VI) from Wastewater.
Hossain, Md Kawsar; Hasan, Md Mehadi; Islam, Md Shahidul; Mefford, O Thompson; Ahmad, Hasan; Rahman, Md Mahbubor.
Afiliación
  • Hossain MK; Department of Chemistry, Pabna University of Science and Technology, Pabna 6600, Bangladesh.
  • Hasan MM; Polymer Colloids & Nanomaterials Group, Department of Chemistry, Faculty of Science, University of Rajshahi, Rajshahi 6205, Bangladesh.
  • Islam MS; Polymer Colloids & Nanomaterials Group, Department of Chemistry, Faculty of Science, University of Rajshahi, Rajshahi 6205, Bangladesh.
  • Mefford OT; Department of Materials Science & Engineering, Clemson University, Clemson, South Carolina 29634-0971, United States.
  • Ahmad H; Polymer Colloids & Nanomaterials Group, Department of Chemistry, Faculty of Science, University of Rajshahi, Rajshahi 6205, Bangladesh.
  • Rahman MM; Polymer Colloids & Nanomaterials Group, Department of Chemistry, Faculty of Science, University of Rajshahi, Rajshahi 6205, Bangladesh.
ACS Omega ; 9(17): 19077-19088, 2024 Apr 30.
Article en En | MEDLINE | ID: mdl-38708251
ABSTRACT
An alternative way for the coating of polypyrrole (PPy) polymer on hydrophobic magnetite (Fe3O4) nanoparticles is reported here to capture toxic chromium ions, Cr (VI), present in water. Iron oxide magnetic nanoparticles (Fe3O4) were synthesized by the conventional coprecipitation technique using FeCl3·6H2O and FeSO4·7H2O iron precursors and subsequently modified with oleic acid (OA). Then OA-Fe3O4 hydrophobic nanoparticles were oxidized using the Lemieux-von Rudloff reaction to transfer OA into hydrophilic azelaic acid (AA) (HOOC(CH2)7COOH-modified magnetic nanoparticles (AA-Fe3O4). Finally, a PPy polymer coating was formed by a seeded polymerization of pyrrole, using AA-Fe3O4 as seeds. The average size of PPy/Fe3O4 nanocomposites is 12.33 nm and is almost spherical in shape. The surface composition is confirmed by FTIR and thermogravimetry analyses. An X-ray diffraction study confirmed the formation of highly crystalline Fe3O4 nanoparticles, and the crystallinity was retained after the surface modification. The adsorption study suggested that the Cr(VI) ion adsorption is highly pH-dependent and the maximum amount of adsorption is obtained at pH 2.0. The adsorption results revealed that the Langmuir model provided the best fit for the isotherm, with a maximum adsorption capacity reaching approximately 173.22 mg g-1 at 323 K. Spontaneous and endothermic adsorption processes were confirmed by evaluating the thermodynamic parameters obtained in this investigation. The kinetics study showed that the interaction between Cr(VI) ions and magnetic nanocomposites was directed by a pseudo-second-order rate process indicating chemisorption. The prepared PPy/Fe3O4 nanocomposites would be promising adsorbents to purify water by eliminating Cr(VI) metal ions from wastewater.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Omega Año: 2024 Tipo del documento: Article País de afiliación: Bangladesh Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Omega Año: 2024 Tipo del documento: Article País de afiliación: Bangladesh Pais de publicación: Estados Unidos