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Comparison of plasma activated water quality prepared by different plasma systems
Staškovanová, Denisa ; Krčma, František (referee) ; Kozáková, Zdenka (advisor)
This diploma thesis deals with generation of reactive species (hydrogen peroxide, nitrates, nitrites) using various plasma systems in distilled and tap water. Prepared plasma activated water differs in the way the plasma is applied, namely plasma above the water surface, plasma inside water or bubbling of plasma gaseous products into water. The main goal is to determine the amount of species produced in different plasma systems and compare them with each other. The effect of ozonizer experimental conditions on the generated amount of reactive species is also monitored.
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Study of plasma activated water application on the soil enzyme activity
Lungová, Tereza ; Enev, Vojtěch (referee) ; Krčma, František (advisor)
The aim of this thesis was the characterization of plasma activated water (PAW) prepared by dielectric barrier discharge under atmospheric pressure and the evaluation of its effect on soil enzymatic activity in a black soil sample, which contains chemically active substances so-called long life species. For this purpose, the pot experiment was chosen based on literature research. Dehydrogenase (DHA) enzyme activity was investigated to determine total soil microbial activity in soil samples watered with plasma activated water with different activation times. Dehydrogenase belongs to the group of oxidoreductases and its activity is a suitable indicator of active biological activity in the soil. In this work, the values of dehydrogenase activity were determined for PAW with 2 minute treatment 2,3 g/gh, for PAW with 5 minutes treatment 2,7 g/gh and for PAW treated with plasma discharge for 10 minutes 3,5 g/gh. In the comparative sample, which was watered with distilled water, the value of dehydrogenase activity was determined to be 2,5 g/gh. Based on the overall analysis, it was found that there is no negative influence on the enzymatic activity in the soil despite the wide range of confirmation of the antimicrobial effects of PAW.
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Comparison of plasma activated water quality prepared by different plasma systems
Staškovanová, Denisa ; Krčma, František (referee) ; Kozáková, Zdenka (advisor)
This diploma thesis deals with generation of reactive species (hydrogen peroxide, nitrates, nitrites) using various plasma systems in distilled and tap water. Prepared plasma activated water differs in the way the plasma is applied, namely plasma above the water surface, plasma inside water or bubbling of plasma gaseous products into water. The main goal is to determine the amount of species produced in different plasma systems and compare them with each other. The effect of ozonizer experimental conditions on the generated amount of reactive species is also monitored.
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