Separation and Recovery of Platinum by Magnetic Core-shell Nano-structures Modified with N-(2-aminoethyl)-3-aminopropyltrimethoxysilane

Document Type: Research Paper

Authors

Abstract

In this paper, Fe
3
O
4
@SiO
2
core/shell magnetic nanostructure has been synthesized and
modified by N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (AEAPTMS). Fe
3
O
4
@SiO
2
was used as a novel adsorbent for separation of hexachloroplatinic acid.X-ray diffraction
(XRD), scanning electron microscopy (SEM), and FT-IR technique were used to characterize
morphologies and surface texturing of this adsorbents. The effective factors on adsorption,
such as pH, contact time; salt effect and temperature were studied systematically. The optimal
conditions of Platinum adsorption were obtained at temperature of about 25oC, pH about 2.5
and the equilibrium time of 30-40 minutes. The maximum adsorption capacity (qmax) in
the optimal conditions was equal to 74mg/g. The magnetic separation of the absorbent was
achieved by a magnet and finally the absorbent was compared with other absorbents. Inductive
coupled plasma optical emission spectrometer (ICP-OES) was used for determination of
metal ion concentrations in the aqueous solution

Keywords