Multicomponent nanoparticles (Fe/FeSNPs) were synthesized using ferric chloride, sodium sulfate and sodium borohydride as reducing agent. Nanoparticles show stability in a wide range of pH and aerobic/anaerobic conditions. Dynamic light scattering (DLS), Transmission electron microscopy (TEM), Fourier transform infrared spectrophotometry (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectrometry (XPS) analyses were performed to characterize the formation and surface chemistry of nanoparticles. It is almost spherical in shape, having a size of 8-10 nm. FTIR spectrum of nanoparticles after removing Cu2+ shows wave length switches of peaks. This could imply the existence of residual hydroxyl groups on the surface of nanoparticles forming complex of Sur-OH-Cu2+ and Sur-O-Cu2+ during the adsorption of Cu2+. XRD peaks at 2? = 44.35� confirm the characteristic features for Fe0 form surrounded by amorphous FeS. XPS spectra provide peaks of Fe2p2/3 and Fe2p1/2 with decreasing binding energy after Cu2+ removal. Results of kinetic tests fit very well to a pseudo-second order of reaction. The synthesized nanoparticles are highly selective for removing heavy metals from artificial water at different pHs and aerobic/anaerobic conditions, reaching to 90-99%. Also, freshly prepared multicomponent nanoparticles interacted with heavy metals contained in mining tailing residuals show a removal up to 95% after 8 hours of treatment

Multicomponent nanoparticles for remediation of heavy metals

248th National Meeting (2014)

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