| Title |
Development of the Engineered Filter Media for Reducing Pollutants in Urban Runoff |
| Authors |
강성원 ( Sung Won Kang ) ; 이재영 ( Jai Young Lee ) ; 김석구 ( Seog Ku Kim ) |
| Keywords |
Buoyant media; Expanded polypropylene; Filtration. Impervious surface; Non-point source |
| Abstract |
Recently it revealed that urban runoff was one of the major source that contaminates the river, lake and estuary because it contains toxic compounds such as heavy metals and Poly Aromatic Hydrocarbons (PAH5) as well as suspended solids, organic compounds and nutrients. The engineered polymetric media in this research were developed for reducing pollutants in urban runoff and would be used to be charged in the storm water treatment equipment. The engineered media that were composed of the polypropylene was foamed to have the buoyancy and then shattered by mechanical for the efficient filtration, In this study, Spherical Expanded Polypropylene Media (SEPM), Crushed Polypropylene Media (CPM), Large Crushed Expanded Polypropylene Media (LCEPM), Small Crushed Expanded Polypropylene Media (SCEPM) were made from polypropylene. Surface characteristics of the developed media were determined by scanning electron microscopy analyses. Also, removal efficiencies of SS, CODcr in the artificial road runoff and the bed headloss by media and particle pollutants captured by media were examined. Results on the surface characteristics of media indicated that SCEPM had the largest specific surface area, 0.80 ㎡/g, the lowest specific gravity, 0.091, and the biggest porosity, 0.63, because of crushing the media at the process of manufacturing. And the SCEPM`s removal efficiencies of TSS and CODcr in the artificial road runoff were 92.9% and 83.6%. respectively and the headloss of SCEPM was the least of them. |