Abstract
In this study LTA zeolite was prepared from kaolin. The effect of ultrasonic irradiation on the crystal structure and ability to ion exchange of some heavy metals were studied. Many techniques were used to characterize the prepared zeolite includes X-ray diffraction analysis (XRD) with crystal lattice analysis, Electron paramagnetic resonance (EPR) and finally ion exchange isotherm of some heavy metal ions. The results showed that the ultrasonicated zeolite exhibits different behavior towards ion exchange with increasing its capacity. The ultrasonicated zeolite showed little increase in the lattice parameters with increasing in the crystal size. Fitting adsorption isotherms on the metal adsorbed showed an observable change in the behavior of ultrasonicated zeolite towards the metals exchanged.
Highlights
The preparation of zeolites from clays and raw materials was a subject of many researches in the past decades [1] [2] [3] [4]
In this study LTA zeolite was prepared from kaolin
The results showed that the ultrasonicated zeolite exhibits different behavior towards ion exchange with increasing its capacity
Summary
The preparation of zeolites from clays and raw materials was a subject of many researches in the past decades [1] [2] [3] [4]. The zeolites were considered to be three dimensional alumino silicate structures consists of tetrahedral of TO4 (T, Si or Al). The resulting combination of these tetrahedra resulted in excess negative charge which balanced by a mobile cation [5]. These distinct proprieties of zeolite enable it form perfect performance in ion exchange. The three dimensional arrangements inside the zeolite structure add a variety of porous structures within the range of micropores [6] [7]. Many synthetic zeolites require what is called template, acts as a directing agent to the required pores [8]
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