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Study of plasma activated water effects on decomposition rate of organic matter using the “tea bag index” method
Bednařík, Tomáš ; Kalina, Michal (referee) ; Kozáková, Zdenka (advisor)
This bachelor thesis deals with the effect of plasma-activated water on the decomposition rate of organic matter using the tea bag index method. The first part of the theory of the bachelor thesis deals with plasma and plasma activated water. The second part deals with the tea bag index method and the analytical methods used in this thesis. In the experimental part, the aim of the thesis was to prepare plasma activated water using dielectric barrier discharge (DBD) and pin-hole discharge. Furthermore, to carry out the physicochemical characterization of plasma activated water, i.e., to determine the concentration of H2O2-, NO3-, NO2-, to measure its conductivity and pH, to determine the soil pH by two methods. The first method was determined using distilled water and the second using 0.2 M KCl. The last objective was to determine the rate of decomposition of organic matter using tea bag index and to assess the effect of plasma activated water on the physicochemical properties of soil. The results obtained indicate a positive effect on soil microorganisms and properties of plasma activated water. The next step in the investigation was to prepare a container experiment, produce and characterize plasma activated water for watering model plants, in this case lettuce.
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