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Adjustment of laboratory wastewater containing chromium
Riša, Juraj ; Vomáčková, Alena (referee) ; Pilátová, Ivana (advisor)
The Bachelor Thesis deals with treatment of laboratory waste water containing chrome. It examines the chrome and its compounds in waste water from inorganic laboratory, trying to concentrate it in the waste water. It uses spectrophotometry with diphenylcarbazide as a method to determine concentration of chromium. To diminish the amount of chromium in waste water, precipitation with barium chloride is used prior to regular pressure filtration. Other part of the Thesis focus on the economic effectiveness of the treatment and its comparison to transport of the waste.
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Optimization of process of preparing graphite electrodes with a layer of lead dioxide
Doros, Stanislav ; Vomáčková, Alena (referee) ; Pilátová, Ivana (advisor)
My study is focused on describing of complex electrochemical methods of preparing of graphite substrate lead dioxide anodes. The theoretical part is devoted to characterization of different parameters which influence the quality (morphology and composition) of the coating. In the experimental part are described the procedures of preparing of the graphite anodes with the lead dioxide coating. In the results are specified the best parameters for which permits the anode to resist high current densities. The whole process consists of substrate treatment, adjustment of current density, period of electroplating and the optimal thickness of plating, control of pH and temperature of solution, additives, rotation of electrode. The lifetime was tested by electrolysis of a potassium chloride water solution for 5 hours by applying 18 A/dm2, the mass of electrode after drying remained constant.
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Optimization of process of preparing graphite electrodes with a layer of lead dioxide
Doros, Stanislav ; Vomáčková, Alena (referee) ; Pilátová, Ivana (advisor)
My study is focused on describing of complex electrochemical methods of preparing of graphite substrate lead dioxide anodes. The theoretical part is devoted to characterization of different parameters which influence the quality (morphology and composition) of the coating. In the experimental part are described the procedures of preparing of the graphite anodes with the lead dioxide coating. In the results are specified the best parameters for which permits the anode to resist high current densities. The whole process consists of substrate treatment, adjustment of current density, period of electroplating and the optimal thickness of plating, control of pH and temperature of solution, additives, rotation of electrode. The lifetime was tested by electrolysis of a potassium chloride water solution for 5 hours by applying 18 A/dm2, the mass of electrode after drying remained constant.
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Adjustment of laboratory wastewater containing chromium
Riša, Juraj ; Vomáčková, Alena (referee) ; Pilátová, Ivana (advisor)
The Bachelor Thesis deals with treatment of laboratory waste water containing chrome. It examines the chrome and its compounds in waste water from inorganic laboratory, trying to concentrate it in the waste water. It uses spectrophotometry with diphenylcarbazide as a method to determine concentration of chromium. To diminish the amount of chromium in waste water, precipitation with barium chloride is used prior to regular pressure filtration. Other part of the Thesis focus on the economic effectiveness of the treatment and its comparison to transport of the waste.
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