Multiple Evaluations of the Removal of Pollutants in Road Runoff by Soil Infiltrationa

Multiple evaluations of the removal of pollutants in road runoff by soil infiltration were investigated. Detailed descriptions of columns and soils were used for the test. Artificial road runoff was prepared using road dust/sediments and groundwater. The samples were analysed for polycyclic aromatic hydrocarbons (PAHs) by GC-MS QP2010 integrated with GC-20A gas chromatograph. The perfluorinated surfactants (PFSs) in the filtrates were concentrated by a factor of 1000 using solid-phase extraction. In the initial stage, the concentration of PAHs in the infiltrated water was approximately 3 times higher than that in the road runoff water. The PAH content in the surface soils was clearly high.