A nine-year study determined that a bioinfiltration rain garden clearly removed the pollutant orthophosphate from stormwater. The median orthophosphate concentration decreased from 0.21-0.25 mg/L in the ponded water to 0.03 mg/L in the pore water at the bottom of the infiltration bed. Pollutant removal remained steady over the nine years of study.
Komlos, John, and Robert G. Traver. (2012). “Long-Term Orthophosphate Removal in a Field-Scale Storm-Water Bioinfiltration Rain Garden.” J. Environ. Eng., 138(10), 991–998.
