-Removal of nitrates, sulfate and Zn(II) ions from aqueous solutions through adsorption onto biopolymeric alginate/clinoptilolite-rich tuff pellets was studied by using an equilibrium batch technique. The idea of this approach of biosorbent fabrication is to promote the native zeolite adsorption performance and thus to prepare more efficient amphoteric tailor-made products for specific environmental targets. A flexible component, i.e., alginate biopolymer, and a rigid component (pulverized) zeolite were crosslinked using Fe(III) and Ca(II) chlorides, additively. The extent of adsorption was found to be considerably higher than with the other mostly natural adsorbents examined towards similar pollutants. The equilibrium adsorption data for the above pollutants were satisfactorily fitted to Freundlich and Langmuir isotherms, respectively. According to the linscale SAXS pattern, there was a strong background visible, which may indicate the presence of a considerable amount of biopolymeric phase in the composite samples analysed. Scanning Tunneling, Electron and Atomic Force Microscopies helped visualize their surface texture and morphology.
Abstract. This paper presents the results of research focused on the attitudes of schoolgirls at the 5th and 9th grade of primary schools towards physical and sport education. The aim of this project was to find out the level of the attitudes of schoolgirls at primary schools in the Bratislava Region. The research sample consisted of 247 schoolgirls attending urban and village primary schools. The basic research tool we have used was the standardized attitudinal questionnaire designed for the primary schools pupils. We have found out that in the 5th and 9th grade of primary schools the positive attitudes toward physical and sport education prevail over the indifferent attitudes. At primary schools in the Bratislava Region, the schoolgirls in the 5th grade showed more positive attitudes than schoolgirls in the 9th grade.
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