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Gewählte Master / Diploma Thesis:

Adalbert Haydn (2005): Untersuchungen an Adsorptionsfiltern zur Reinigung von Straßenabwässern.
Master / Diploma Thesis, BOKU-Universität für Bodenkultur, pp 118. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
The diploma thesis investigates filter materials for the removal of pollutants from road runoff implemented in a treatment plant. The filter materials, material mixture of vermiculite, philipcit, dolomite, soil with high organic matter and activated carbon were analysed in this thesis. These materials were characterized according to their hydraulic conductivity and sorption capacities for zinc, cadmium, copper and polycyclic aromatic hydrocarbons (PAH). Batch and column experiments with standards and "real" road runoff were carried out. The hydraulic conductivity of the materials ranges from 2.0 *10-4 to 2.2 *10-4 m/s. The zinc isotherm parameters (Freundlich model) were: kF = 285, n = 0.091. The selected pollutants Cd, Cu, Zn, anthracen and fluoranthen could be removed completely with the filter materials. From the column experiments, it could be summarized that a complete removal of the dissolved metals Cd, Cu, Zn could be achieved by the filter materials MM0, MM10 within an EBCT of 3.1 minutes. The PAH elimination of the filter materials MM0 and MM10 dropped within an EBCT of 5.5 minutes from 100% to 50% after 33 filter volumes of sample passed through the column. The column experiments with "real" road runoff could not achieve the same removal efficiency as the standard solution. Approximately 75% of zinc and copper could be eliminated with the analyzed filter materials, the PAH elimination rate was very high at approximately 90%. The column experiments indicated that a part of the fine particles passed the filter - turbidity in the outflow was clearly visible. As known from literature, 50% PAH and heavy metals could be bound to particles. The suspended matter present in the road runoff had a crucial influence on the removal efficiency of the filter materials. It was found that the hydraulic properties should be optimized to minimize the influence of the suspended particles and particle transport in the removal efficiency of the filter materials.

Beurteilende(r): Fürhacker Maria

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