Synthesis, Characterization and Cr(VI) Adsorption Properties of Modified Magnetite Nanoparticles

• Authors: H. Çıftçı , B. Ersoy , A. Evcın
• Languages of publication: EN

Abstracts

EN

In this study, magnetite (Fe₃O₄) nanoparticles were synthesized by chemical co-precipitation method, coated with silica, and then the surface of silica coated magnetite (Fe₃O₄@SiO₂) nanoparticles was modified with (3-aminopropyl)triethoxysilane (APTES) at first. Secondly, attained nanoparticles were characterized by the Fourier transform infrared, X-ray diffraction, transmission electron microscopy, the Brunauer-Emmett-Teller, vibrating sample magnetometer, and zeta-sizer devices/methods. Finally, detailed adsorption experiments were performed to remove hexavalent chromium (Cr(VI)) from aqueous media by synthesized nanoparticles. Mean size and specific surface area of synthesized nanoparticles were about 15 nm and 89.5 m²/g, respectively. The highest adsorption capacity among used adsorbents (Fe₃O₄, Fe₃O₄@SiO₂, Fe₃O₄@SiO₂@L) was attained by Fe₃O₄ nanoparticles and it was determined that adsorption capacity of the other two adsorbents was too low when compared to the Fe₃O₄ nanoparticles. Optimum conditions for Cr(VI) adsorption by Fe₃O₄ nanoparticles were: pH, 3; temperature, 55°C; contact time, 90 min; adsorbent concentration, 0.5 g/l and initial Cr(VI) concentration 10 mg/l. Under these conditions, adsorption capacity and removal percentage of Cr(VI) were found to be 33.45 mg/g and 88%, respectively.

Keywords

EN

nanomagnetite; adsorption; Cr(VI); Langmuir; Freundlich; adsorption kinetics

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 132
• Issue: 3
• Pages: 564-569

Dates

published

2017-09

Contributors

author

H. Çıftçı

• Afyon Kocatepe University, Mining Engineering Department, Afyonkarahisar, Turkey

author

B. Ersoy

• Afyon Kocatepe University, Mining Engineering Department, Afyonkarahisar, Turkey

author

A. Evcın

• Afyon Kocatepe University, Material Science and Engineering Department, Afyonkarahisar, Turkey

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Identifiers

DOI

10.12693/APhysPolA.132.564