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Determination of palladium by ET-AAS after previous preconcentration by solid phase extraction
Hajdová, Jana ; Čelechovská, Olga (referee) ; Komendová, Renata (advisor)
The theoretical part of this master’s thesis focuses on the characteristic of Palladium, his uses in the automotive convertors, the occurrence in the environment, bioaccumulation and human health risks. Next there are described the basics of biomonitoring and summarize suitable biomonitoring method for capturing airborne dust. There are also evaluated appropriate methods for preconcentration and determination of Palladium. The aim of experimental part of this thesis is description and evaluation optimalization preconcentration method SPE by using sorbents silicagel C18 and QuadraSil TA. Optimization of method conditions of electrothermal atomic absorption spectrometry (ET – AAS). The determination of Palladium using optimal conditions follows in real samples in the form of exposure lichen (Hypogymnia physodes) by automobile traffic in Brno.
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Palladium in the environment
Hajdová, Jana ; Řezáčová, Veronika (referee) ; Komendová, Renata (advisor)
This work is focused on palladium in the environment. Its use is especially in the automobile industry as catalytic converters of motor vehicles, but also is applied in dental, jewelry making and electrical appliances. The release of this metal from automobile catalysts is getting into all environmental compartments (soil, road dust, water, plants), where goes to its accumulation. It can be a part of the food chain and cause health risks to humans. The work also focuses on methods of sampling, preconcentration and methods, which can determined palladium in environmental samples (spectrophotometric methods, AAS, ICP-AES and ICP-MS).
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Platinum group elements in waste and surface waters
Novotný, Matěj ; Řezáčová, Veronika (referee) ; Komendová, Renata (advisor)
This assignment provides a detailed description of platinum metals, their occurrence in surface and waste water and their determination options. Currently, platinum metals are widely used in the automotive industry as a part of a catalyst, as well as in medicine and jewelery. Release of these metals in pure form and the form of oxides leads to their subsequent accumulation, which directly affects fauna and flora. Due to that, the living conditions and health status of some organisms are petting worse.
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Emissions from transport - a new pollutants
Dvořák, Rostislav ; Sommer, Lumír (referee) ; Doležalová Weissmannová, Helena (advisor)
This work is focused on platinum group metals (Pt, Rh, Pd), their use in the automotive industry, risks associated with the occurrence of these substances in the environment, their potential impact on population health and, ultimately, the characteristics of these elements and some of their compounds as such.
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Leaching characterization of platinum group elements from automotive catalytic converters
Štědrý, Robin ; Mihaljevič, Martin (advisor) ; Navrátil, Tomáš (referee)
The distribution of platinum group elements and increase of thein emissions in the environment are mostly related to the use of automobile catalyst. The antropogenic emissions of these noble metals accumulate aloung the roads. The methods such as ICP-OES and XRD were used for determinativ of phase and elemental composition of these samples. The matrix of the gasoline catalyst is composed of Al, Ce oxides with Pt-Pd-Rh coatings. Matrix of diesel catalyst is composed of cordierite with Pt coatings. ICP-MS was used for determination Pt, Pd and Rh. Before the analysis was performed such as pre-concetration fire assay fusion into a NiS button. The leaching characterization of Pt, Pd and Rh was examined during kinetic batch experiments in sodium chloride (1g/l, NaCl), 20 mM Na2P4O7 (NaPyr), fulvic acid (FK, DOC 50 mg/L) and 20 mM citric acid . The results show, that the dissolution of Pt and Pd is the fastest in citric acid and sodium pyrophosphate. Sodium chloride in the concentrations employed, which could be derived from melt waters formed during winter road treatment, does not have a substantiv impal on the speciation and mobilization of Pt and Pd. Organic acid does not have significantly impct on the release of Pt and Pd to the solution. The calculated normalized bulk released NRi values in the range 0,16...
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Leaching characterization of platinum group elements from automotive catalytic converters
Štědrý, Robin ; Mihaljevič, Martin (advisor) ; Navrátil, Tomáš (referee)
The distribution of platinum group elements and increase of thein emissions in the environment are mostly related to the use of automobile catalyst. The antropogenic emissions of these noble metals accumulate aloung the roads. The methods such as ICP-OES and XRD were used for determinativ of phase and elemental composition of these samples. The matrix of the gasoline catalyst is composed of Al, Ce oxides with Pt-Pd-Rh coatings. Matrix of diesel catalyst is composed of cordierite with Pt coatings. ICP-MS was used for determination Pt, Pd and Rh. Before the analysis was performed such as pre-concetration fire assay fusion into a NiS button. The leaching characterization of Pt, Pd and Rh was examined during kinetic batch experiments in sodium chloride (1g/l, NaCl), 20 mM Na2P4O7 (NaPyr), fulvic acid (FK, DOC 50 mg/L) and 20 mM citric acid . The results show, that the dissolution of Pt and Pd is the fastest in citric acid and sodium pyrophosphate. Sodium chloride in the concentrations employed, which could be derived from melt waters formed during winter road treatment, does not have a substantiv impal on the speciation and mobilization of Pt and Pd. Organic acid does not have significantly impct on the release of Pt and Pd to the solution. The calculated normalized bulk released NRi values in the range 0,16...
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Platinum group elements in waste and surface waters
Novotný, Matěj ; Řezáčová, Veronika (referee) ; Komendová, Renata (advisor)
This assignment provides a detailed description of platinum metals, their occurrence in surface and waste water and their determination options. Currently, platinum metals are widely used in the automotive industry as a part of a catalyst, as well as in medicine and jewelery. Release of these metals in pure form and the form of oxides leads to their subsequent accumulation, which directly affects fauna and flora. Due to that, the living conditions and health status of some organisms are petting worse.
|
|
|
Determination of palladium by ET-AAS after previous preconcentration by solid phase extraction
Hajdová, Jana ; Čelechovská, Olga (referee) ; Komendová, Renata (advisor)
The theoretical part of this master’s thesis focuses on the characteristic of Palladium, his uses in the automotive convertors, the occurrence in the environment, bioaccumulation and human health risks. Next there are described the basics of biomonitoring and summarize suitable biomonitoring method for capturing airborne dust. There are also evaluated appropriate methods for preconcentration and determination of Palladium. The aim of experimental part of this thesis is description and evaluation optimalization preconcentration method SPE by using sorbents silicagel C18 and QuadraSil TA. Optimization of method conditions of electrothermal atomic absorption spectrometry (ET – AAS). The determination of Palladium using optimal conditions follows in real samples in the form of exposure lichen (Hypogymnia physodes) by automobile traffic in Brno.
|
|
|
Emissions from transport - a new pollutants
Dvořák, Rostislav ; Sommer, Lumír (referee) ; Doležalová Weissmannová, Helena (advisor)
This work is focused on platinum group metals (Pt, Rh, Pd), their use in the automotive industry, risks associated with the occurrence of these substances in the environment, their potential impact on population health and, ultimately, the characteristics of these elements and some of their compounds as such.
|
|
|
Palladium in the environment
Hajdová, Jana ; Řezáčová, Veronika (referee) ; Komendová, Renata (advisor)
This work is focused on palladium in the environment. Its use is especially in the automobile industry as catalytic converters of motor vehicles, but also is applied in dental, jewelry making and electrical appliances. The release of this metal from automobile catalysts is getting into all environmental compartments (soil, road dust, water, plants), where goes to its accumulation. It can be a part of the food chain and cause health risks to humans. The work also focuses on methods of sampling, preconcentration and methods, which can determined palladium in environmental samples (spectrophotometric methods, AAS, ICP-AES and ICP-MS).
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