Immobilization of Thiadiazole Derivatives on Magnetite Mesoporous Silica Shell Nanoparticles in Application to Heavy Metal Removal from Biological Samples

• Published in: AIP conference proceedings 2012-10, Vol.1311 (1)
• Main Authors: Emadi, Masoomeh, Shams, Esmaeil
• Format: Article
• Language: English
• Subjects: ABSORPTION SPECTROSCOPY; ADSORPTION; BIOLOGICAL MATERIALS; BLOOD; BODY FLUIDS; CAPACITY; CHARGED PARTICLES; COHERENT SCATTERING; COPPER IONS; COPRECIPITATION; DIFFRACTION; ELECTRON MICROSCOPY; ELEMENTS; FOURIER TRANSFORMATION; HEAVY METALS; INFRARED SPECTRA; INTEGRAL TRANSFORMATIONS; IONS; IRON ORES; ISOTHERMS; KINETICS; LAYERS; MAGNETITE; MATERIALS; METALS; MICROSCOPY; MINERALS; NANOSCIENCE AND NANOTECHNOLOGY; NANOSTRUCTURES; ORES; OXIDE MINERALS; PARTICLES; PRECIPITATION; REMOVAL; SCATTERING; SEPARATION PROCESSES; SILICA; SOL-GEL PROCESS; SORPTION; SPECTRA; SPECTROSCOPY; TRANSFORMATIONS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.3530001

In this report magnetite was synthesized by a coprecipitation method, then coated with a layer of silica. Another layer of mesoporous silica was added by a sol-gel method, then 5-amino-1,3,4-thiadiazole-thiol (ATT) was immobilized onto the synthesized nanoparticles with a simple procedure. This was followed by a series of characterizations, including transmission electron microscopy (TEM), FT-IR spectrum, elemental analysis and XRD. Heavy metal uptake of the modified nanoparticles was examined by atomic absorption spectroscopy. For further investigation we chose Cu{sup 2+} as the preferred heavy metal to evaluate the amount of adsorption, as well as the kinetics and mechanism of adsorption. Finally, the capacity of our nanoparticles for the heavy metal removal from blood was shown. We found that the kinetic rate of Cu{sup 2+} adsorption was 0.05 g/mg/min, and the best binding model was the Freundlich isotherm.