|
(16-02) Bark as filter for storm water pollution removal. Bergqvist, Per-Anders*,1, Kliaugaite, Daina1,2, Zaliauskiene, Audrone2, 1 Environmental Chemistry, Umeå, Sweden2 Environmental Engineering, Kaunas, Lithuania, Lithuania ABSTRACT- Storm water is produced I all corners of the world and is usually released to the lakes and rivers without any cleaning. In urban areas are oil products and combustion products common pollutants and they often exceed the solubility concentration in water as can be seen on the surface. The handling of this water in conventional wastewater treatment plants is not desirably because of high content of oil, metals and other toxic products. In this study the capacity of natural bark and commercial bark products for reducing the oil content are measured. The trapping of oil is done in laboratory scale bark columns. A simple analytical method for analysing the leaching oil is developed involving isopropanol, hexane and detection with UV-spectrophotometry. The results are verified with a GC/MS method. During the use of bark as filter for water, large amounts of phenolic compounds are released creating an analytical problem as well as a possible environmental problem. These amounts might be larger than the oil removed by the filter. Key words: Storm water, Bark, oil, removal |
