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Gewählte Master / Diploma Thesis:

Tadele Measho Haile (2008): Removal of stormwater runoff pollutants from parking area using natural geomedia materials.
Master / Diploma Thesis, BOKU-Universität für Bodenkultur, pp 166. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
Stormwater runoff from trafficked areas introduces significant loads of total suspended solids (TSS), heavy metals, polyaromatic hydrocarbons (PAH), mineral oil, nutrients and total organic carbon (TOC) into the environment. A filtration treatment system consisted of sedimentation basin and filter chambers filled with adsorbents (filter media): composite, vermiculite, zeolite and activated carbon was installed to control pollution from a parking lot runoff at Gaaden, Austria. In the present study, the capacity of the adsorbents for heavy metal (Cd2+, Cu2+ and Zn2+) and PAHs (anthracene, fluoranthene and pyrene ) removal from aqueous solutions was evaluated. In addition the efficiency of the treatment plant in reducing pollutants was evaluated using mean concentrations and loads determined from eleven runoff event samples collected from the influent and effluent sections. From the batch experiments >> 97% removal index was determined for all filter media at initial concentrations of 1-15 mg/L Cd2+, 1-100 mg/L Cu2+and 5-250 mg/L Zn2+ and the equilibrium concentration was mostly below limit of detection (zeolite>MEV>vermiculite. Selectivity of zeolite, vermiculite and MEV were in the order of Cu2+>Cd2+>Zn2+, while composite showed Zn2+>Cu2+>Cd2+. The treatment efficiency was calculated using differences between influent and effluent concentrations and loads. Overall, mean removal efficiency of 85%, 71%, 52%, 75% , 73%, 78 to 98%, 83% and 93% were determined for TSS, NH4-N, TOC, Cu2+, Zn2+, individual PAHs, total sum of PAHs (16 EPA) and mineral oil respectively. The mechanisms of removal includes: settlement, physical straining, ion exchange, adsorption, and precipitation.

Beurteilende(r): Fürhacker Maria

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