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Novel polyimide-g-Fe 2 O 3 hybrid nanocomposite films (PI/g-Fe 2 O 3 ) has been developed from the poly (amic acid) salt of oxydianiline with different weight percentages (5, 10, 15 wt %) of g-Fe 2 O 3 using tetrahydrofuran (THF) and N,N-dimethylacetamide (DMAc) as aprotic solvents. The prepared polyimide-g-Fe 2 O 3 nanocomposite films were characterized for their structure, morphology, and thermal behavior employing Fourier transform infrared spectroscopy (FTIR), scanning electron micrograph (SEM), transmission electron micrograph (TEM), X-ray diffraction (XRD),

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Solid adsorbents have shown great promise for control of particulate and non-particulate matter and as gas sensing devices in recent times. In the present study, adsorption of environmental toxic pollutant such as lead ions on solid adsorbents viz. α α-Fe 2 O 3 and fly ash, are reported. Considerable adsorption was observed on fly ash when compared to α α-Fe 2 O 3 surface. These studies are characterized by employing solid state and solution studies.

New combustion synthetic route for the synthesis of nanosized γ-Fe 2 O 3 by microwave-assisted route is reported. X-ray density, tap density and powder density of prepared γ-Fe 2 O 3 are calculated. Adsorption study of Pb 2+ on combustion derived nanosized γ-Fe 2 O 3 is studied by dynamic method. The γ-Fe 2 O 3 structure and lead adsorbed γ-Fe 2 O 3 (Pb-γ-Fe 2 O 3 ) are studied by X-ray diffraction (XRD). Additional lead peaks in Pb-γ-Fe 2 O 3 sample pattern confirm the lead adsorption. Morphology of as prepared γ-Fe 2 O 3 and Pb-γ-Fe 2 O 3 is studied by scanning electron micrograph (SEM) technique. Varied morphology for Pb-γ-Fe 2 O 3 compared to its γ-Fe 2 O 3 is observed. Variation of bonding in Pb-γ-Fe 2 O 3 sample due to lead adsorption is viewed by infrared spectroscopic (IR) technique. Energy dispersive X-ray microanalysis (EDX) is scanned for the lead adsorbed γ-Fe 2 O 3 to know the presence of lead on γ-Fe 2 O 3 surface. The eluent lead solution is characterized by atomic absorption spectroscopy (AAS) and solution conductivity (SC). Reduction in the concentration and increase in conductance of eluent lead solution is observed. The potential use of solid adsorbents for the adsorption of heavy metal pollutants is envisaged in the present work.