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Soil hydrogels based on the principle of controlled release
Macuráková, Viktória ; Smilková, Marcela (referee) ; Kratochvílová, Romana (advisor)
This bachelor thesis is focused on soil hydrogels, which operate on the principle of controlled release. The aim of the research was on the release of substances, and the practical use of hydrogels in agricultural practice. At work, we focused on the effect of humic substances and the quantities of the substances of the fertilizer NPK of hydrogel. Querying this data will use a variety of methods such as pH-metry, conductometry, spectrophotometry and chromatography and knowledge not only of the analysis but also the macromolecular chemistry. Experiment it was found that the content of sodium lignohumate does not affect the rate of release of potassium and phosphorus into the soil. Hydrogel which is located above the quantity of NPK fertilizer and a certain number of lignohumate released from its structures much larger amounts of ions such as Hydrogel without fertilizer NPK with approximately the same amount of lignohumate
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Interactions of soil organic matter with pollutants studied by microcalorimetric techniques
Macuráková, Viktória ; Sedláček, Petr (referee) ; Smilek, Jiří (advisor)
This diploma thesis dealt with the study of interactions of soil organic matter, specifically humic acids with a pollutant, where the surfactant Septonex was used. Humic acids were isolated from two different soils in the work, namely black earth and cambium. The theoretical part describes the formation of humic acids as such, their possible interactions with substances and the characterization of surfactants. The experimental part is devoted to the characteristics of humic acids using elemental analysis, thermogravimetry and then the most important part of the thesis, namely the monitoring of interactions using isothermal titration calorimetry. The experiment showed that the sample of isolated black earth at the surfactant concentration of 0,075 moldm3 had the best interaction with the surfactant.
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Interactions of soil organic matter with pollutants studied by microcalorimetric techniques
Macuráková, Viktória ; Sedláček, Petr (referee) ; Smilek, Jiří (advisor)
This diploma thesis dealt with the study of interactions of soil organic matter, specifically humic acids with a pollutant, where the surfactant Septonex was used. Humic acids were isolated from two different soils in the work, namely black earth and cambium. The theoretical part describes the formation of humic acids as such, their possible interactions with substances and the characterization of surfactants. The experimental part is devoted to the characteristics of humic acids using elemental analysis, thermogravimetry and then the most important part of the thesis, namely the monitoring of interactions using isothermal titration calorimetry. The experiment showed that the sample of isolated black earth at the surfactant concentration of 0,075 moldm3 had the best interaction with the surfactant.
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Soil hydrogels based on the principle of controlled release
Macuráková, Viktória ; Smilková, Marcela (referee) ; Kratochvílová, Romana (advisor)
This bachelor thesis is focused on soil hydrogels, which operate on the principle of controlled release. The aim of the research was on the release of substances, and the practical use of hydrogels in agricultural practice. At work, we focused on the effect of humic substances and the quantities of the substances of the fertilizer NPK of hydrogel. Querying this data will use a variety of methods such as pH-metry, conductometry, spectrophotometry and chromatography and knowledge not only of the analysis but also the macromolecular chemistry. Experiment it was found that the content of sodium lignohumate does not affect the rate of release of potassium and phosphorus into the soil. Hydrogel which is located above the quantity of NPK fertilizer and a certain number of lignohumate released from its structures much larger amounts of ions such as Hydrogel without fertilizer NPK with approximately the same amount of lignohumate
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