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The influence of alkali activator on immobilization of metals in alkali activated blast furnace slag
Bystrianska, Emília ; Kalina, Lukáš (referee) ; Koplík, Jan (advisor)
In this work the influence of alkaline activator on immobilization of lead and copper in alkali-activated blast furnace slag was investigated. A total of five activators were used; sodium water glass, potassium water glass, sodium hydroxide, potassium hydroxide and sodium carbonate. The leaching test according to ČSN EN 12457-4 was used to evaluate the level of immobilization of heavy metals, the leached solutions were analyzed by ICP-OES. For a better understanding of immobilization, the selected samples were characterized by analytical methods (FTIR, XRD, SEM, XPS). It was found that the degree of immobilization Pb2+ and Cu2+ in AAS was very high, regardless of the type of alkaline activator used.
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The leachability of metals from geopolymers using various leaching mediums
Bystrianska, Emília ; Beranová, Denisa (referee) ; Koplík, Jan (advisor)
The aim of this work is the comparison of the leachability of metal from AAM due to the use of various leaching mediums. The ability to stabilize 1 wt. % Pb2+ in alkali-activated matrices was compared using different leaching tests (ČSN EN 12457, HJ-T/299, TCLP). The concentration of metal content in leachate was determined by ICP-OES method. The matrices consisted of blast-furnace slag and high-temperature fly ash. Lead distribution in matrices was analyzed by SEM microscopy. Furthermore, the effect of mechanical strength and pH leachate on the lead concentration were examined.
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The influence of alkali activator on immobilization of metals in alkali activated blast furnace slag
Bystrianska, Emília ; Kalina, Lukáš (referee) ; Koplík, Jan (advisor)
In this work the influence of alkaline activator on immobilization of lead and copper in alkali-activated blast furnace slag was investigated. A total of five activators were used; sodium water glass, potassium water glass, sodium hydroxide, potassium hydroxide and sodium carbonate. The leaching test according to ČSN EN 12457-4 was used to evaluate the level of immobilization of heavy metals, the leached solutions were analyzed by ICP-OES. For a better understanding of immobilization, the selected samples were characterized by analytical methods (FTIR, XRD, SEM, XPS). It was found that the degree of immobilization Pb2+ and Cu2+ in AAS was very high, regardless of the type of alkaline activator used.
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The leachability of metals from geopolymers using various leaching mediums
Bystrianska, Emília ; Beranová, Denisa (referee) ; Koplík, Jan (advisor)
The aim of this work is the comparison of the leachability of metal from AAM due to the use of various leaching mediums. The ability to stabilize 1 wt. % Pb2+ in alkali-activated matrices was compared using different leaching tests (ČSN EN 12457, HJ-T/299, TCLP). The concentration of metal content in leachate was determined by ICP-OES method. The matrices consisted of blast-furnace slag and high-temperature fly ash. Lead distribution in matrices was analyzed by SEM microscopy. Furthermore, the effect of mechanical strength and pH leachate on the lead concentration were examined.
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