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Comparison of effectiveness of three applications of zero-valent iron nanoparticles for remediation of groundwater polluted by chlorinated ethenes
Vacková, Nikola ; Stejskal, Vojtěch (advisor) ; Oswald, Sascha (referee)
This master's thesis is focused on remediation of groundwater polluted by chlorinated ethenes with a use of nanoiron particles. Three injections of different types of nanoiron were carried out in the contaminated area of Spolchemie a.s. company in Ústí nad Labem. The main aim of the thesis was to compare effectiveness of those three applications. The remediation of groundwater was done by direct- push injection of suspension of nanoscale zero-valent iron. After that a monitoring of groundwater level and physicochemical parameters was performed. Samples of groundwater were collected during the monitoring and were analysed for contaminants and products of dechlorination. It was discovered that NANOFER STAR nanoiron had the strongest influence on reductive dechlorination. This was reflected by concentration decrease of TCE by 84 %, VC by 60 % and total concentration of CHC by 39 % in the period three months after the injection and the increase of degradation products of chlorinated ethenes. Injections of conservative tracers potassium bromide and lithium chloride served as a criterion for differentiation between the process of dechlorination and simple dilution effect. The effectiveness of NZVI-C3 nanoiron and NANOFER STAR with CMC nanoiron were notably lower than the bare NANOFER STAR nanoiron. In...
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Comparison of effectiveness of three applications of zero-valent iron nanoparticles for remediation of groundwater polluted by chlorinated ethenes
Vacková, Nikola
This master's thesis is focused on remediation of groundwater polluted by chlorinated ethenes with a use of nanoiron particles. Three injections of different types of nanoiron were carried out in the contaminated area of Spolchemie a.s. company in Ústí nad Labem. The main aim of the thesis was to compare effectiveness of those three applications. The remediation of groundwater was done by direct- push injection of suspension of nanoscale zero-valent iron. After that a monitoring of groundwater level and physicochemical parameters was performed. Samples of groundwater were collected during the monitoring and were analysed for contaminants and products of dechlorination. It was discovered that NANOFER STAR nanoiron had the strongest influence on reductive dechlorination. This was reflected by concentration decrease of TCE by 84 %, VC by 60 % and total concentration of CHC by 39 % in the period three months after the injection and the increase of degradation products of chlorinated ethenes. Injections of conservative tracers potassium bromide and lithium chloride served as a criterion for differentiation between the process of dechlorination and simple dilution effect. The effectiveness of NZVI-C3 nanoiron and NANOFER STAR with CMC nanoiron were notably lower than the bare NANOFER STAR nanoiron. In...
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Comparison of effectiveness of three applications of zero-valent iron nanoparticles for remediation of groundwater polluted by chlorinated ethenes
Vacková, Nikola
This master's thesis is focused on remediation of groundwater polluted by chlorinated ethenes with a use of nanoiron particles. Three injections of different types of nanoiron were carried out in the contaminated area of Spolchemie a.s. company in Ústí nad Labem. The main aim of the thesis was to compare effectiveness of those three applications. The remediation of groundwater was done by direct- push injection of suspension of nanoscale zero-valent iron. After that a monitoring of groundwater level and physicochemical parameters was performed. Samples of groundwater were collected during the monitoring and were analysed for contaminants and products of dechlorination. It was discovered that NANOFER STAR nanoiron had the strongest influence on reductive dechlorination. This was reflected by concentration decrease of TCE by 84 %, VC by 60 % and total concentration of CHC by 39 % in the period three months after the injection and the increase of degradation products of chlorinated ethenes. Injections of conservative tracers potassium bromide and lithium chloride served as a criterion for differentiation between the process of dechlorination and simple dilution effect. The effectiveness of NZVI-C3 nanoiron and NANOFER STAR with CMC nanoiron were notably lower than the bare NANOFER STAR nanoiron. In...
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Comparison of effectiveness of three applications of zero-valent iron nanoparticles for remediation of groundwater polluted by chlorinated ethenes
Vacková, Nikola ; Stejskal, Vojtěch (advisor) ; Oswald, Sascha (referee)
This master's thesis is focused on remediation of groundwater polluted by chlorinated ethenes with a use of nanoiron particles. Three injections of different types of nanoiron were carried out in the contaminated area of Spolchemie a.s. company in Ústí nad Labem. The main aim of the thesis was to compare effectiveness of those three applications. The remediation of groundwater was done by direct- push injection of suspension of nanoscale zero-valent iron. After that a monitoring of groundwater level and physicochemical parameters was performed. Samples of groundwater were collected during the monitoring and were analysed for contaminants and products of dechlorination. It was discovered that NANOFER STAR nanoiron had the strongest influence on reductive dechlorination. This was reflected by concentration decrease of TCE by 84 %, VC by 60 % and total concentration of CHC by 39 % in the period three months after the injection and the increase of degradation products of chlorinated ethenes. Injections of conservative tracers potassium bromide and lithium chloride served as a criterion for differentiation between the process of dechlorination and simple dilution effect. The effectiveness of NZVI-C3 nanoiron and NANOFER STAR with CMC nanoiron were notably lower than the bare NANOFER STAR nanoiron. In...
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Remediation of rock mass by zero-valent nanoiron
Vacková, Nikola ; Stejskal, Vojtěch (advisor) ; Nosek, Jaroslav (referee)
This bachelor's thesis is focused on remediation of chlorinated hydrocarbons. The main aim of the thesis was to elaborate a method of remediation of groundwater by using in situ chemical reduction by nanoscale zero-valent iron by direct push method at the Spolchemie site in Ústí nad Labem. From the monitoring of physicochemical parameters and analysis of groundwater it was discovered that the injection of nanoscale zero-valent iron caused reductive dehalogenation in the soil body. This was reflected in the increase of degradation products of chlorinated hydrocarbons. Nanoscale zero-valent iron reached borehole AW5-50 that was situated 4 metres away from the place of injection. A long-term (3.5 month) reduction of the contaminants (89 %) was monitored in this borehole. In the theoretical part of the thesis there is a description of contamination by chlorinated hydrocarbons, properties of nanoscale zero-valent iron, in situ chemical reduction by nanoiron, and natural conditions at the Spolchemie site.
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