клиноптилоліт

Microparticles based on natural Transcarpathian clinoptilolite (CL), its H- and Na-forms are synthesized by physicochemical modifications, in particular, heat treatment and doping with metal activators (Ag and Cu). Doping of CL samples with metal ions was carried out in two different ways: the first was to use the solid-phase extraction method under dynamic conditions followed by mechanochemical treatment, and the second was to mechanochemically treat the CL samples with Ag and Cu compounds.

The IR spectroscopy and complex thermal analysis have been used to analyze the adsorption capacity of Transcarpathian clinoptilolite, both naturally occurring and activated, relative to water vapor.

It was found that under the action of acoustic vibrations of the ultrasonic (US) range, the rate of sorption of Argentum ions and the static capacity of clinoptilolite are much higher than for the original natural zeolite. Pre-activation of the zeolite at 350 °С allows to increase the content of Argentum ions.An increase in both the power of the US-radiation and the modification temperature makes it possible to increase the static capacity of the zeolite.It is shown that the process of modification of clinoptilolite occurs mainly in the transition region.

Natural clinoptilolite is used in a variety of technological processes, in particular as sorbents. In order to achieve high technological and techno-economic indicators of the processes in which zeolite is used, it is necessary to provide them with the highest possible sorption ability. This is achieved by activating natural zeolites by physical, physico-chemical and chemical methods. One of the promising methods of activating natural zeolites is their treatment in the field of ultrahigh-frequency electromagnetic radiation.

The adsorption properties of Transcarpathian clinoptilolite regarding Cr (VI) ions is studied. It was found that the adsorption isotherm has s-like form and belongs to the isotherm of type II. It is established that the adsorption proceeds further after the formation of monomolecular adsorption layer. It leads to the cteation of dimolecular layer. Вивчено адсорбційні властивості закарпатського клиноптилоліту стосовно іонів  Cr (VI). З’ясовано, що ізотерма адсорбції має s-подібний вигляд і належить до ізотерми  ІІ типу.