Recent studies have found that constructed stormwater wetlands (CSWs) are not valuable P retention tools past a certain point in their lifetime especially when the dominant form of P is soluble (SRP). The goal of this research is to understand the fate and transport of SRP through a surface-flow CSW under typical and altered physical, chemical, and biological conditions. A two-phased, laboratory mesocosm approach was taken. Phase 1 illuminated vertical and horizontal pathways of SRP transport within vegetated and non-vegetated mesocosms, which informed the experimental design of phase 2. Pore water was extracted at vertical and horizontal locations within the soil profile and analyzed for SRP showing significant differences between t=0 and t=24 across all ports. Soil samples were taken at t=0 and t=24 and analyzed for P, Fe, and Al. Phase 2 is a proposed study looking at the effects of two soil amendment techniques: (1) iron amended and (2) aerated soil.
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