Korkuna O. Pd(II) sorptive concentration on clinoptilolite and mordenite and its application in analysis

Natural and acid modified clinoptilolite and mordenite and also clinoptililite modified by organic reagents (PAN, CAS, acetylacetone and dioxime acetylacetone) as well as aqueous complex compound of Pd(II) are the object of investigation. The goal of thesis is elaboration of the new, express, selective, designed methods for Pd(II) microamount extraction by transcarpathian zeolites. Research methods: oscillopolarography, spectrophotometry, atomic absorption and amission spectroscopy, photoacoustic IR-spectroscopy, X-ray analysis, thermogravimetric analysis, electron spectroscopy, method of low-temperature adsorption/desorption of nitrogen. The optimum conditions of Pd(II) sorption from nitrate and ammonium solutions on natural clinoptilolite and mordenite and their Н-forms under static and dynamic conditions of sorption as well as desorption conditions of Pd(II) from these zeolites have been established. The rows of efficiency of displacement ion-exchangeable cations under acid modification of clinoptilolite and mordenite as well as during Pd(II) sorption on natural and Н-zeolites have been built. The sorption capacity of all investigated sorbent forms has been determined. The possible mechanisms of Pd (ІІ) sorption by present zeolites were estimated. Modification of the clinoptilolite by organic reagents complexants the Pd(II) 1-(2-piridilazo)-2-naphthol and chrome azurol S by immobilization has been carried out. The clinoptilolite with the grafted groups of acetylacetone and dioxime acetylacetone by means of stage organic syntheses has been obtained for the first time. The methods of Pd(II) concentration and separation under static sorption conditions by Н-clinoptilolite in the model solutions, in radio details on the basis of bronze and jewellery alloys and by H-mordenite in the model solutions as well as under dynamic sorption conditions by natural clinoptilolite in wastes of jewellery production have been elaborated, approved and applied in. Sphere of employing: analytical chemistry, ecology of an environment, jewellery and radiotechnical industries, pharmaceutical analysis.