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Environmental Effects of 223-Ra Radiopharmaceuticals
Krmelová, Tereza ; Smrček, Stanislav (advisor) ; Podlipná, Radka (referee)
Title: Environmental Effects of 223 Ra Radiopharmaceuticals Author: Tereza Krmelová Branch: Environmental chemistry Type of thesis: Diploma thesis Advisor: Doc. Ing. Stanislav Smrček, CSc Abstract: In thesis was studied the possibility of extracting the nanoparticles of titanium dioxide or hydroxyapatite with bounded 223 Ra by root system of tested plant species Avena sativa and Zea mays as a model for phytoremediation technologies. The thesis obtains data to assess the potential of residues radioactivity and nanomaterials entering the food chain. There was also verified an experiment of 223 Ra phytoextraction, in the form of nitrate, in effects on addition of EDTA, which was conducted in Bachelor thesis. This experiment was repeated because of its results, which were inconsistent with generally described phytoextraction efficiency improvements after adding the complexing agents. In this work was primary studied translocation of radioactive material from the root to shoot. Experimentally was confirmed the extraction of nanoparticles with bounded 223 Ra and translocation into shoot. In the case of Avena sativa, capturing of nanoparticles hydroxyapatite with bounded 223 Ra was 53 % of which 88 % of activity was recovered in roots and 12 % in shoots. Capturing nanoparticles of titanium dioxide with bounded 223...
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Phytoextraction of radionuclides as the model of radiopharmaceutical residues decontamination
Krmelová, Tereza ; Smrček, Stanislav (advisor) ; Kozempel, Ján (referee)
Title: Phytoextraction of radionuclides as the model of radiopharmaceutical residues decontamination Author: Tereza Krmelová Branch: Environmental chemistry Type of thesis: Bachelor's Advisor: Doc. Ing. Stanislav Smrček, CSc Abstract: The aim is to demonstrate the possibility of 223 Ra extraction by root system tested plant species Avena sativa and Zea mays as a model phytoremediation technology and to obtain data to assess the possible entry of residues in food chains. It is also studied the possible effect of additives - complex agents and growth stimulators on uptake and translocation of contaminant from roots to shoot. It was confirmed the addition of additives EDTA, Atonic® , Sunagreen® , Rexan® , Stimulator Z® , Racine® , Vermaktiv Stimul® a Vermaktiv RP affect to uptake and translocation of the 223 Ra in the plant. Addition of stimulators reduces 223 Ra uptake 75% of the starting activity value from 24 to 71% for corn, but simultaneously increases the translocation the contaminant to shoots. The uptake is reduced from original 84% to 20-59% for oats. The uptake isn't affected for the experiments with added Sunagreen® and addition of EDTA causes only minimal uptake of studied contaminant. From the results it is evident that uptake of 223 Ra is possible. Commonly used growth regulators increase...
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