Reverse Precipitation Synthesis of ≤ 10 nm Magnetite Nanoparticles and Their Application for Removal of Heavy Metals from Water

Fe 3 O 4 nanoparticles having size ≤ 10nm were prepared by reverse co-precipitation method. This is a rapid, simple, and cost-effective (only one Fe-salt is used) synthesis route in only one step reaction without applying temperature, surfactants or inert gases as compared with previously published...

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Veröffentlicht in:SILICON 2019-02, Vol.11 (1), p.85-104
Hauptverfasser: Zawrah, Mahmoud F., El Shereefy, El Sayed E., Khudir, Ahmed Y.
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description Fe 3 O 4 nanoparticles having size ≤ 10nm were prepared by reverse co-precipitation method. This is a rapid, simple, and cost-effective (only one Fe-salt is used) synthesis route in only one step reaction without applying temperature, surfactants or inert gases as compared with previously published routes. The prepared nano particles were investigated by X-ray (XRD), transmission electron microscope (TEM), thermal gravimetric analysis (TGA), fourier transform infrared (FT-IR) and vibrating sample magnetometer (VSM). These nanoparticles were appraised as an adsorbents for eliminating Pb(II), Cu(II), and Zn(II) from water. The equilibrium data was analyzed by Langmuir, Freundlich, and (D-R) isotherms. Pseudo-second-order, Elovich and intra-particle diffusion models were used to study the kinetics of reaction. Adsorbent cycling was performed to examine its stability and reusability. The results revealed that the adsorption efficiency trend was Pb>Cu>Zn at pH 5.5, 6.5 and 6, respectively and influenced by ionic radius of cations. The maximum suitable mass of adsorbent was 200mg, after which the agglomeration occurred and adsorption efficiency decreased. It is indicated that the adsorption process was well fitted to Langmuir. Also, the adsorption followed the pseudo-second-order-model for Pb(II) and Zn(II), but Elovich for Cu(II). Adsorbent retained about 90% with Pb(II), 40% with Cu(II), and 30% with Zn(II) of its initial sorption efficiency after 3 cycles.
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subjects Adsorbents
Adsorption
Chemistry
Chemistry and Materials Science
Copper
Efficiency
Environmental Chemistry
Fourier transforms
Heavy metals
Infrared analysis
Inorganic Chemistry
Iron oxides
Lasers
Lead
Materials Science
Nanoparticles
Optical Devices
Optics
Original Paper
Particle diffusion
Photonics
Polymer Sciences
Rare gases
Synthesis
Thermal analysis
Thermogravimetric analysis
Zinc
title Reverse Precipitation Synthesis of ≤ 10 nm Magnetite Nanoparticles and Their Application for Removal of Heavy Metals from Water
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