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Ověření účinnosti filtrace přes granulové uhlí při odstraňování mikropolutantů na vybraných úpravnách pitné vody
MARTANOVÁ, Andrea
My bachelor thesis is called Verification of filtration efficiency through granular carbon in removal of micropollutants in selected drinking water treatment plants. The aim of this work was to determine the efficiency of granular activated carbon (GAC) filters in connection with other technological processes (especially with ozonisation). Passive samplers (POCISs) were installed at the drinking water treatment plants in Pilsen and in Plav during spring and autumn 2019. Moreover, grab water samples were taken in the first and last day of POCIS deployment. Concentrations of selected pesticides and pharmaceuticals were determined by a liquid chromatography with a tandem mass spectrometry in a laboratory LECHB Vodňany. In particular, the results of the analysis showed the occurrence of telmisartan and metabolites of metazachlor (metazachlor ESA and metazachlor OA) and metolachlor (metolachlor ESA) in raw water. Telmisartan was reduced in final water unlike metazachlor ESA, which seemed to be problematic in final water in the spring campaign at drinking water treatment plant in Pilsen. The results also confirmed the occurrence of atrazine and its metabolites in raw water. Furthermore, elevated concentrations of some compounds were found before the GAC filters than in the inlet to the drinking water treatment plants. The concentrations of these compounds were lower in the outlet than before GAU filters. The removal efficiency was calculated not only for all compounds together but also for each compound individually. Evaluation showed higher total removal efficiency at drinking water treatment plant in Pilsen, where the removal efficiency was 99 % in the autumn campaign, while in the spring campaign removal efficiency was only 61 %. The reason for this difference could be deactivated ozonisation during the spring campaign. This result demonstrates possibility of high removal efficiency of micropollutants for ozonisation followed by GAC filtration. Removal efficiency for drinking water treatment plant Plav was set as 46 % in the spring campaign and 67 % in the autumn campaign. The reason for these low removal efficiencies may be missing of ozonisation in treatment technology at this drinking water treatment plant.
Detailed record
New sampling approaches for evaluation of real remediation studies
Kroupová, Kristýna
;
Cajthaml, Tomáš
(advisor) ;
Innemanová, Petra
(referee)
This diploma thesis has been carried out as a part of the project Utilization of long term (passive) sampling methods combined with in situ microcosms for assessment of (bio)degradation potential (PASSES). In the frame of the project groundwater remediation took place in the premises of Farmak a.s. in Olomouc using a pilot photooxidation unit and efficiency of the remediation was monitored through passive and active sampling methods. Pilot photooxidation unit is a technology based on the H2O2/UV-C photochemical oxidation of organic pollutants. In this work optimization tests of the pilot photooxidation unit were performed. The residence time of the groundwater in the photoreactors, required for its sufficient decontamination from pharmaceuticals and aromatic hydrocarbons, was 2.5 hours. 91% degradation of the pharmaceuticals and 80% degradation of aromatic hydrocarbons were reached during this interval. Although the removal efficiency of the pharmaceuticals by the photooxidation unit was high, the pilot photooxidation unit was not able to effectively remove the pharmaceuticals at the studied locality. By comparing the results of the pharmaceuticals from active and passive groundwater sampling during the remediation attempt, passive Polar Organic Chemical Integrative Sampler (POCIS) was found to be...
Detailed record
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