23 Result(s)
within
O. Rosskopfová
Physical Chemistry
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Article
Removal of pertechnetate from aqueous solution using activated pyrolytic rubber char
Low-cost adsorbents, synthesized by pyrolysis of waste rubber (CR) and activated with KOH (CRA), have shown the high removal ability of ...
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Article
Sorption and desorption of pertechnetate on biochar under static batch and dynamic conditions
The objective of this study was the utilization of three different biochars for pertechnetate removal from aqueous solutions. Biochars were prepared by slow pyrolysis from different feedstocks, characterized b...
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Article
Sorption of pertechnetate anions on chitosan
Chitosan is one of the natural materials of biological origin. It is able to adsorb of metal ions through its amino- and hydroxyl groups. This work was aimed to study influence of the contact time, effect of p...
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Article
Column studies for the separation of 99mTc using activated carbon
Activated carbon (AC) is an organic material with a high carbon content and is made from carbon-based material by its thermal decomposition in a furnace using a controlled atmosphere and heat. In this study, A...
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Article
Effect of competing anions on pertechnetate adsorption by activated carbon
Activated carbon (AC) has a relatively high efficiency for retaining TcO4 − compared to other materials. AC is used on a vast scale in gas and water purification, metal extraction, medicine and ma...
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Article
Adsorption of nickel on rhyolitic Slovak bentonites
Radioisotope of nickel 63Ni is an important product of the neutron activation in engineering materials of nuclear power plants. Adsorption of nickel on Slovak rhyolitic bentonites Jelšový potok, Kopernica and Las...
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Article
Adsorption of nickel on andesitic bentonite Lieskovec
Adsorption of nickel on Slovak andesitic bentonite Lieskovec was studied using batch method. As a tracer was used radionuclide 63Ni. In this paper, we focused on effects of contact time, pH, competitive cations a...
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Article
Preparation and characterization of adsorbent based on carbon for pertechnetate adsorption
Activated carbon can potentially be used as an adsorbent for removing Tc from aqueous solutions. Five carbon materials were prepared by soaking of fibrous cellulose with different solutions containing inorgani...
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Article
First shrinkage parameters of Slovak bentonites considered for engineered barriers in the deep geological repository of high-level radioactive waste and spent nuclear fuel
The high potential of bentonites to volume changes depending on the water content is considered as their advantage for the engineered barriers in the deep geological repository of high-level radioactive waste ...
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Article
Sorption of nickel on chitosan
The sorption of nickel on chitosan was studied using batch method. As a tracer was used radioisotope 63Ni. The effect of pH and contact time to reach sorption equilibrium was investigated. During the sorption of ...
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Article
Adsorption equilibrium and kinetic studies of strontium on Mg-bentonite, Fe-bentonite and illite/smectite
Radionuclide adsorption on clay rocks has in recent years been studied mainly in connection with their use as sealing barriers in nuclear waste and spent nuclear fuel repositories. In Slovakia we find deposits...
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Article
Adsorption of nickel on synthetic hydroxyapatite from aqueous solutions
The sorption of nickel on synthetic hydroxyapatite was investigated using a batch method and radiotracer technique. The hydroxyapatite samples used in experiments were a commercial hydroxyapatite and hydroxyap...
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Article
Comparative study of strontium adsorption on dioctahedral and trioctahedral smectites
Slovak bentonites characterized by good rheological, mineralogical and chemical stability are considered as suitable sealing barriers for construction of Slovak deep geological repository for high-level radioa...
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Article
Comparative study of cesium adsorption on dioctahedral and trioctahedral smectites
Bentonites which are characterized by good rheological, mineralogical and chemical stability is considered used as sealing barriers in multibarrier Slovak system of deep geological repository for high-level ra...
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Article
Study of sorption processes of copper on synthetic hydroxyapatite
The sorption of copper on synthetic hydroxyapatite was investigated using a batch method and radiotracer technique. The hydroxyapatite sample prepared by a wet precipitation process was of high crystallinity w...
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Article
Sorption of anthropogenic radionuclides on natural and synthetic inorganic sorbents
The history of sorption and ion-exchange processes starts with the use of natural materials which properties were discovered coincidentally and ends with the age of polymer and anorganic—or synthetic sorbents ...
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Article
Automated production of 64Cu prepared by 18 MeV cyclotron
64Cu (T1/2 = 12,7 h, β− 37,1 %, β+ 17,9 %, EC 41 %) is a useful radioisotopes for positron emission tomography radiopharmaceutical. We used the reaction route 64Ni(p,n)64Cu for the 64Cu preparati...
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Article
Effect of gamma-irradiation on adsorption properties of Slovak bentonites
One of the basic prerequisites for the use of bentonite as engineering barrier in deep geological repositories for radioactive waste and spent nuclear fuel is their stability against ionizing radiation stemmin...
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Article
Distribution of strontium in milk component
The distribution of strontium between the milk components, i.e., serum, casein micelles, whey and hydroxyapatite was determined. The sorption on hydroxyapatite was investigated using batch method and radiotrac...
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Article
Determination of 63Ni in the low level solid radioactive waste
Nickel is a constituent of wide range of construction materials in nuclear industry and their corresponding activation products are often encountered in low level solid radioactive waste and effluents. The art...
