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Influence of soil pretreatment on the determination of its properties using thermogravimetry
Ragačová, Lucia ; Doležalová Weissmannová, Helena (oponent) ; Kučerík, Jiří (vedoucí práce)
This diploma thesis focuses on the influence of soil pretreatment on the determination of its properties by the method of thermogravimetry, which allows the soil sample to be analyzed as a whole. The aim is to clarify how soil preparation affects the results of TG soil analysis. Soil preparation can have a major impact on its quality and thus disrupt the interrelationships of soil components that have been formed as a result of long-term pedogenesis. In this thesis, therefore, the original soils were compared with the soils, which were grinded using a ball mill before the analysis, which represented a very intensive intervention in the soil structure and was therefore a mechanically disturbed soil. A modified method of deriving weight loss has been used to evaluate the issue. The data obtained were divided into 10°C thermal intervals, in-between which the loss of weight of the individual intervals were identified. The impact of soil milling on its determinability in relation to the total carbon and nitrogen content in the soil have been compared through the correlation of data obtained from elemental analysis and TG data. Subsequently, we focused on comparing the interrelationships of the equations of ground and unground soil samples, based on the theoretical equations of the issue. As a final look, we chose autocorrelation of TG data for the obtained ground and unground samples. The results of the examination have shown that even though grinding of samples represents a very intensive intervention into the soil structure and thus the soil is mechanically disturbed, such sample preparation has only a minimal effect on the determinability of soil properties.
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Influence of soil pretreatment on the determination of its properties using thermogravimetry
Ragačová, Lucia ; Doležalová Weissmannová, Helena (oponent) ; Kučerík, Jiří (vedoucí práce)
This diploma thesis focuses on the influence of soil pretreatment on the determination of its properties by the method of thermogravimetry, which allows the soil sample to be analyzed as a whole. The aim is to clarify how soil preparation affects the results of TG soil analysis. Soil preparation can have a major impact on its quality and thus disrupt the interrelationships of soil components that have been formed as a result of long-term pedogenesis. In this thesis, therefore, the original soils were compared with the soils, which were grinded using a ball mill before the analysis, which represented a very intensive intervention in the soil structure and was therefore a mechanically disturbed soil. A modified method of deriving weight loss has been used to evaluate the issue. The data obtained were divided into 10°C thermal intervals, in-between which the loss of weight of the individual intervals were identified. The impact of soil milling on its determinability in relation to the total carbon and nitrogen content in the soil have been compared through the correlation of data obtained from elemental analysis and TG data. Subsequently, we focused on comparing the interrelationships of the equations of ground and unground soil samples, based on the theoretical equations of the issue. As a final look, we chose autocorrelation of TG data for the obtained ground and unground samples. The results of the examination have shown that even though grinding of samples represents a very intensive intervention into the soil structure and thus the soil is mechanically disturbed, such sample preparation has only a minimal effect on the determinability of soil properties.
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