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Study of the content of risk elements in river sediments of the Váh River
Držíková, Klára ; Zlámalová Gargošová, Helena (referee) ; Komendová, Renata (advisor)
This bachelor thesis deals with the analysis of selected heavy metals in the river sediment of the Váh River. The elements were selected based on their relatively frequent occurrence and adverse effects on humans, fauna, and flora. Also due to their ability of good accumulation and persistence in sediments. The selected elements have a chalcophile character, which plays a significant role in the occurrence of the elements at the sampling sites. The analysis of the collected sediment samples was carried out using atomic absorption spectroscopy. The highest concentration of zinc (386.58 mg/kg), followed by copper (57.67 mg/kg), lead (42.24 mg/kg), and the lowest concentration of mercury (0.332 mg/kg) was measured in the sediments. Sediments are used in agriculture and forestry to improve soil properties. Their application to soils is regulated by Slovak legislation, which sets limit values for risk elements in the concerned sediment and soil. These established limits were not exceeded in any of the sediment samples.
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Phosphorus forms in river sediments
Schrimpelová, Kateřina ; Hrich, Karel (referee) ; Malá, Jitka (advisor)
Two main mechanism of immobilization of phosphorus in sediments are formation of insoluble phosphates of Ca, Mg, Fe, Al, and sorption. Phosphorus can be also immobilized as organic phosphorus contained in the biomass. This thesis is focused on searching of relationships between total, organic and inorganic phosphorus and iron, calcium and organic matter content in fluvial sediments. Within the framework of this thesis, samples of sediments have been collected and analyzed. The measured values have been filled by the data measured at the Institute of Chemistry in the years 2011-2012. Total number of samples is 48. Data have been statistically analyzed by Student’s t-test at the = 0,05 and = 0,01 levels of significance. The relationships between total phosphorus and iron and organic matter have been proven. Also the relationship between organic phosphorus and organic matter content has been proven and surprisingly the correlation with iron, too. The inorganic phosphorus indicated significant relationship with iron, but no significant relationship with the calcium content. At last there has been proven the correlation between inorganic phosphorus and the organic matter content.
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Study of the content of risk elements in river sediments of the Váh River
Držíková, Klára ; Zlámalová Gargošová, Helena (referee) ; Komendová, Renata (advisor)
This bachelor thesis deals with the analysis of selected heavy metals in the river sediment of the Váh River. The elements were selected based on their relatively frequent occurrence and adverse effects on humans, fauna, and flora. Also due to their ability of good accumulation and persistence in sediments. The selected elements have a chalcophile character, which plays a significant role in the occurrence of the elements at the sampling sites. The analysis of the collected sediment samples was carried out using atomic absorption spectroscopy. The highest concentration of zinc (386.58 mg/kg), followed by copper (57.67 mg/kg), lead (42.24 mg/kg), and the lowest concentration of mercury (0.332 mg/kg) was measured in the sediments. Sediments are used in agriculture and forestry to improve soil properties. Their application to soils is regulated by Slovak legislation, which sets limit values for risk elements in the concerned sediment and soil. These established limits were not exceeded in any of the sediment samples.
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Phosphorus forms in river sediments
Schrimpelová, Kateřina ; Hrich, Karel (referee) ; Malá, Jitka (advisor)
Two main mechanism of immobilization of phosphorus in sediments are formation of insoluble phosphates of Ca, Mg, Fe, Al, and sorption. Phosphorus can be also immobilized as organic phosphorus contained in the biomass. This thesis is focused on searching of relationships between total, organic and inorganic phosphorus and iron, calcium and organic matter content in fluvial sediments. Within the framework of this thesis, samples of sediments have been collected and analyzed. The measured values have been filled by the data measured at the Institute of Chemistry in the years 2011-2012. Total number of samples is 48. Data have been statistically analyzed by Student’s t-test at the = 0,05 and = 0,01 levels of significance. The relationships between total phosphorus and iron and organic matter have been proven. Also the relationship between organic phosphorus and organic matter content has been proven and surprisingly the correlation with iron, too. The inorganic phosphorus indicated significant relationship with iron, but no significant relationship with the calcium content. At last there has been proven the correlation between inorganic phosphorus and the organic matter content.
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