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oai:ojs.www.eurjchem.com:article/776 2013-12-31T06:16:57Z eurjchem:ART driver

Lead uptake by new silica-carbon nanoparticles Hammud, Hassan Hasan Chahine, Mayssam Mostafa El-Hamaoui, Bassem Hanifehpour, Younes Lead Kinetics Adsorption Thermodynamics Silica-carbon nanoparticle Scanning electron microscope Silica-carbon nanoparticles (SCNP) were prepared from sonication of silica and anthracene. The size of homogenous nanoparticle is around 5-20 nm confirmed by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). SEM analysis indicated surface porosity. SCNP were used to remove lead ions (Pb(II)) from aqueous solutions. Adsorption isotherm of Pb(II) on SCNP was well fitted in terms of the Freundlich and Langmuir models. The maximum adsorption capacity of SCNP for Pb(II) was found to be 385 mg/g (1.86 mmol/g) in batch experiment. Thermodynamic studies indicated that sorption process of lead onto SCNP was spontaneous and exothermic. A pseudo-second order model has been employed in order to describe the kinetic adsorption processes, and the thermodynamic activation parameters were calculated. In a column studies, qy the Yan adsorption capacity of SCNP for Pb(II) was found to be 130.66 mg/g (0.63 mmol/g). Atlanta Publishing House LLC 2013-12-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://www.eurjchem.com/index.php/eurjchem/article/view/776 10.5155/eurjchem.4.4.425-433.776 European Journal of Chemistry; Vol. 4 No. 4 (2013): December 2013; 425-433 2153-2257 2153-2249 eng https://www.eurjchem.com/index.php/eurjchem/article/view/776/PDF