Veronika Demovics Sillikova

• PhD
• Laboratory Assistant at Slovak Academy of Sciences

This study investigates the ²¹⁰Pb activity concentrations in tobacco and cigarettes available in Slovakia, utilizing two specific extraction methods including the Sr Resin sorbent used in extraction chromatography, and the AnaLig Sr01 sorbent, which operates based on molecular recognition principles. The findings revealed significant variations in...

This study investigates the impact of active learning on the acquisition of competencies and learning outcomes in the context of organic chemistry education. Specifically, this study focuses on the implementation of active learning in the extraction of an unknown mixture of organic compounds using acidic and basic solutions. This research is based...

This study aims to statistically compare two methods for determining ²¹⁰ Pb in tobacco: the molecular recognition sorbent method (AnaLig Sr01) and the extraction chromatography sorbent method (Sr Resin). The TriCarb 3100 TR liquid scintillation spectrometer was used to measure and determine ²¹⁰ Pb activity in the tobacco solution. Statistical analy...

The main aim of this work was to develop a suitable sorbent for the separation and determination of ²²⁶ Ra through ¹³³ Ba (radio tracer) in water samples using fly ash sorbent. After the modification with KMnO 4 the effects of pH, competing ions, the possibility of elution, and the effect of water volume were tested. As a suitable eluent 6 mol/L HC...

This paper discusses the findings of a corrosion experiment which investigates a transition area which is between the lower area and upper area of the sample. In this experiment, the lower half of the sample surface is exposed to molten salt and the upper half of the sample surface is exposed to the vapors generated by molten FLiNak salt. Incoloy®8...

This study investigates the corrosion of Hastelloy‐N and Hastelloy‐G35 alloys in an environment of vapors generated from FLiNaK (LiF–NaF–KF: 46.5–11.5–42.0 mol%) salt in an argon and partial (5%) oxygen at 800°C for 48 h. The result of the experiment showed that Hastelloy‐N and Hastelloy‐G35 experienced corrosion in the salt vapor/oxygen environmen...

In this paper, the possibility of caesium sorption on microfibres produced by the Slovak Academy of Sciences was investigated. Sorption capacity limit of sorbent was increased by chemical modification. The binding of Cs to the surface of potassium copper ferrocyanide modified carbon microfibers was demonstrated by SEM–EDX analysis. Statistical comp...

Both radioactive isotopes, ²¹⁰Pb and ⁹⁰Sr, accumulate in bones and procedures for their determination usually include radiochemical methods prior their detection. This work describes a novel method for simultaneous determination of ²¹⁰Pb and ⁹⁰Sr in bone samples by using molecular recognition technology product AnaLig®Sr-01 gel, commercially availa...

Cesium-137 is an important indicator of radioactive pollution in the aquatic environment. The aim of this study was to increase the sorption capacity of fly ash by its modification using hexacyanoferrate impregnation. According to the results, the Langmuir model was more likely to be correct than the Freundlich model. The maximum sorption capacity...

The biosorbent used in this study was prepared from wood-decay fungus Fomes fomentarius. The chemical modification of biosorbent with potassium–copper hexacyanoferrate (KCuHCF) for cesium sorption in aqueous solutions studies was used. It was found that the biosorbent has a high ¹³⁷Cs absorbability in the wide range of pH, even in the solutions wit...

This paper describes a new sequential method using anion exchange resin, which is commercially available from Eichrom Technologies, Inc., for the determination of ⁹⁹Tc and ¹²⁶Sn in nuclear waste samples. For the determination of non-actinide radionuclides in radioactive wastes, several methods have been recently introduced. This method is suitable...

The paper describes a new sequential method employing anion exchange resin or TEVA® Resin which are commercially available from Eichrom Technologies, Inc. for determination of 93Zr, 94Nb, 99Tc and 126Sn in nuclear waste samples. The method is suitable for the separation of these radionuclides from acidic solutions. Samples after digestion were dire...