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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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