Removal of Particles and Dissolved Metals in Motorway Runoff by Filtration and Adsorption Using the Expanded Polypropylene Media
This research was conducted to investigate the application of the novel upflow-type filtration device using hydrophobia media made of expanded polypropylene (EPP) from driveways site. The higher level of motorway-derived heavy metal contamination exists in stormwater runoff from a road section and the heavy metal levels were higher than the regulated Korean environmental guideline in lake and river. For Cd, Cr, Cu, Pb and Zn, the influent event mean concentrations (EMCs) during 8 storm periods were 2.75, 37.3, 90.5, 118.5 and 546.5 µg/L, respectively. The novel upflow-type filtration device with main mechanism of filtration and adsorption showed removal (>91%, >93%, >85%, >91% and >80%) of the studied heavy metals (Cd, Cr, Cu, Pb and Zn) and differences of medians of removal efficiencies among heavy metals were not statistically signficant by Kruskal-Wallis test (p>0.05) during 8 storm events. It is found that EPP media is very effective at the removal of the heavy metals, and the magnitude of heavy metal removal in a decreasing order is Cr, Cd, Pb, Cu and Zn.
Hyungsun Kim, JienFeng Yang, Tohru Sekino and Soo Wohn Lee
S. W. Kang et al., "Removal of Particles and Dissolved Metals in Motorway Runoff by Filtration and Adsorption Using the Expanded Polypropylene Media", Materials Science Forum, Vols. 620-622, pp. 125-128, 2009