Like nitrogen, phosphorus is an essential nutrient for growth of plants and organisms and plays an important role in
eutrophication.
Sedimentation of particulate phosphorus and sorption and precipitation of soluble phosphorus are the main
processes for phosphorus removal. Phosphorus is adsorbed on the filtration materials used, if sufficient Al, Fe, Ca
or Mg are present. This process is of course subject to saturation.

Wetland plants will store phosphorus during the growing season and release it at senescence.
Removal Mechanisms: Phosphorus
Constructed Wetlands