Development of Magnetic Zeolites for Removal of Metallic Contaminants from Industrial Wastewater.

Since the discovery of multi- walled and single- walled carbon nanotubes (MWNTs and
SWNTs, respectively), research ontheir application is being actively carried out. In this
report, a series of magnetic Faujasite (FAU) zeolites are hydrothermally synthesized
using traditional hydrothermal method by adding empty MWNTs and Fe203- filled
MWNTs in the crystallization. The products were characterized with X-ray diffraction
(XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM),
and fourier transform infrared spectroscopy (FTIR> The results show that all the
synthesized products exhibit typical nature of FAU zeolites. Comparing the magnetic
zeolites (FAU/ Fe203 MWNT) synthesized with pure FAU zeolites, their adsorption
capabilities of Cr3+ are still high. When the magnetic zeolites are used to extract ion from
solution disposed without molding, their powder products can be easily separated from
solvent or solution by magnetic separation technology.