Synthesis of Fe3O4/Humic Acid/Silver nanoparticles and their application in Cu and Cd adsorption

Year 2018, Volume: 1 Issue: 3, 19 - 24, 01.07.2018

Fatos Ayca Ozdemir Olgun , Gozde Mediha Kamer Birsen Demirata Ozturk

Abstract

Nanoparticle technology
developed rapidly due to the multifunctional utilization of nanoparticles in
many disciplines such as medicine, drug delivery, environmental chemistry, food
chemistry and analytical chemistry. In concept of this study, magnetic
nanoparticles with a core-shell structure were synthesized and applied to the
adsorption of copper and cadmium. The synthesis procedure consists of two
steps. In the first step a core-shell structure was formed with Fe₃O₄
and humic acid. In the second step, the coating of synthesized core/shell
structure with silver occurs. The characterization of synthesized nanoparticles
was performed with the aid of Scanning Electron Microscope (SEM) images
combined with an elemental distribution image (EDX mapping), Zeta Potential,
and Dynamic Light Scattering (DLS) analyses. Adsorption isotherms of copper and
cadmium on Fe₃O₄/HA/Ag multi-component structure were
studied. The optimum adsorption conditions in aqueous solutions were fixed at
pH 9 and at 300 K. As a result, the Fe₃O₄/HA/Ag
multi-component structure showed excellent adsorption capacity for both copper
and cadmium ions with removal percentages of 92% and 97% after the calculations
were performed using the absorbance values measured by Flame Atomic Absorption
Spectrometer (FAAS) respectively. Langmuir isotherm, which describes the
monolayer adsorption was found to be the most adequate to fit the overall
procedure. 

Keywords

Nanocomposites, magnetic nanoparticles, humic acid, metal removal, Langmuir isotherm

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