Response of Typha domingensis Pers. in floating wetlands systems for the treatment of water polluted with Phosphorous and Nitrogen

MUFARREGE, M.M.; DI LUCA, G.A.; CARRERAS, A.A.; HADAD H.R.; MAINE, M.A.; CAMPAGNOLI, M.A; NOCETTI, E.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

SPRINGER HEIDELBERG

Lugar: HEIDELBERG; Año: 2023

0944-1344

The aims of this work were to evaluate the effects of P and N on the tolerance and root morphometry of Typha domingensis plants, and their implication in removal efficiency in floating treatment wetlands (FTWs). Pilot-scale plastic reactors containing plants, sediment, and tap water were arranged. FTWs consist of a plastic net, and buoyancy was provided by a PVC frame. After plant acclimation, 38 L of the synthetic effluent containing 10 mg L-1 N + 2 mg L-1 P were added to the reactors as follows: Reactor A (with FTWs), Reactor B (without FTWs), Reactor BC (Biological Controls), and Reactor CC (Chemical Control). Reactors were arranged in triplicate. During the experiment, three effluent dumps were made. The removals of SRP and TP were significantly higher in reactors A than in reactors B. N-NH4+ removal was not significantly different between reactors A and B, while N-NO3- removal from water was higher in reactors A than in reactors B. At the end of the experiment, chlorophyll concentration and aerial and submerged (roots and rhizomes) biomass increased significantly in reactors A. TP concentrations were not different between rhizomes and leaves, while the lowest concentrations were observed in roots. The TKN in tissues was significantly higher in roots and rhizomes than in aerial parts. In plants exposed to the experimental solution, the internal and external root morphology changed. The use of FTWs is a promising strategy for the sustainable treatment of nutrient polluted water bodies.