Abstract
Facile Synthesis of Silica Coated Magnetic Nanoparticles via Green Microwave-Solventless Technique for Purification of Water from Toxic Heavy Metals
Highlights
Nano-adsorbents are nanoscale particles or nanocomposites from organic/inorganic materials that have high affinity to absorb substances due to small size and high surface area [1]
Fourier Transforming Infrared (FT-IR) analysis: The FT-IR spectra of silica, Fe3O4, and Fe3O4/SiO2, are shown in Figure 1 for determination of variation frequency changes in the range of 4000-400 cm-1. (Figure 1a) illustrates the spectrum of silica gel in which appear a strong and sharp peak of Si-O bond at 1100 cm-1, the peaks at 480 cm-1 are ascribed to the Si-O-Si bending vibration, a strong peak of the silanol groups appear at 3444.82 cm-1
The characteristic wavenumbers of 625 and 575 cm-1 corresponds to the Fe-O bonds, which is reported to belong to bulk magnetite, (Figure 1b)
Summary
Nano-adsorbents are nanoscale particles or nanocomposites from organic/inorganic materials that have high affinity to absorb substances due to small size and high surface area [1]. There are many techniques and processes that have been used to remove heavy metals from water such as precipitation, ion exchange, evaporation, electrochemical treatments, membrane filtration, flocculation, reverse osmosis, evaporation, flotation, and oxidation. The study of prolonged medium effects on the adequacy of SCMNPs is important from practical application point of view It was investigated under static conditions, different concentrations (0.1, 0.3, and 0.5M) of HCl prepared, mixed with definite weights of nano-adsorbent and shaking the mixture for 30 min. 100 mg of SCMNPs after adsorption of metal ion at optimum pH values was mixed with excess of 0.1M EDTA solution They are shaken for an hour, filtered, washed with DDW many times and dried at 60 °C for 6 h to evaluate the ability of SCMNPs to be reused
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