مرکز منطقه ای اطلاع رساني علوم و فناوري - THE PREPARATION OF MAGNETICALLY MODIFIED SYNTHETETIC AND NATURAL ZEOLITES AND COMPARISON OF THEIR SOME PHYSICAL PROPERTIES

Abstract :

In this study, magnetically modified zeolites (MMZ) has been produced and their adsorption, ion-exchange and magnetic properties have been studied. In this study, natural zeolite mineral, clinoptiloli-te, which belongs to Gördes (Manisa) regions and synthetic 13X zeolite, which has been produced by Sigma-Aldrich firm have been used. In order to modify the surface of these minerals, magnetite samp-le which belongs to Divriği (Sivas) region has been used. The engagement of magnetite particles on zeolite particles has been studied. For this reason, measuring, visualization and analysis techniques as DTA-TG, XRD, XRF, SEM and EDX have been used. As a result of these procedures, it has been ob-served that magnetite particles get engaged on the surface of zeolite particles and magnetite contribu-tion on MMZ has changed adsorption, ion-exchange and magnetic properties. In order to determine how magnetite contribution affects adsorption, ion exchange and magnetic properties of MMZ, weightily magnetite contribution ratio (zeolite/magnetite) has been applied in three different forms (1/1, 1/2, 1/3). As a result of nitrogen adsorption of MMZ, it has been observed that as the weightily magnetite contribution ratio goes up, specific surface area goes down and average pore diameter rises. It has been identified that total cation exchange capacity rises as the weightily magnetite contribution ratio goes up. It has been observed that pure zeolites, which have no magnetic properties, as a result of magnetically modification process, they have got magnetically character, and they change their mag-netic properties positively as the weightily magnetite contribution goes up. It has been determined that as a result of magnetic measurements; the optimum value of applied outer magnetic field is 0.5T.