Reduction of Urban Storm-Runoff Pollution Using Porous Concrete Containing Iron Slag Adsorbent

Abstract

Urban storm runoff is one of the significant sources of surface and groundwater pollution in metropolitan areas. The purpose of this research is to evaluate the performance of porous concrete containing iron slag with sand filter to control urban storm-runoff pollution. Treatments of porous concrete containing iron slag in presence and absence of a sand filter were studied and compared. Parameters of chemical oxygen demand (COD), turbidity, concentration of lead, electrical conductivity (EC), total suspended solids (TSS), and pH in treatment media influent and effluent were measured. The results show that except for EC and pH, the porous concrete containing iron slag with a sand filter significantly improved all of these stated parameters. While the removal efficiency of control porous concrete with a sand filter for COD, turbidity, lead (initial=2 mg/L), lead (initial=5 mg/L), and TSS was at 11, 38, 44, 42, and 53%, respectively, these rates increased to more than 43, 91, 91, 95, and 70% for porous concrete containing iron slag with a sand filter. The use of porous concrete containing iron slag with a sand filter is suggested in urban areas affected by stormwater in order to reduce surface-water and groundwater pollution.