Potential metal phytoremediation in peri-urban wetlands using rooted macrophytes

HADAD, H.R.; MUFARREGE, M.M.; DI LUCA, G.A.; DENARO, A.C.; NOCETTI, E.; MAINE, M.A.

ECOLOGICAL ENGINEERING

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2022 vol. 182

0925-8574

The pollution of natural water bodies and peri-urban wetlands is frequent in the Middle Parana River(Argentina). This work evaluates the potential use of different rooted macrophytes for metal phytoremediation inperi-urban wetlands. Macrophytes, water and sediment were collected in the study sites. Cr, Ni, Zn, Pb, totalphosphorus (TP) and total Kjeldahl nitrogen (TKN) were determined in water, sediment, and different planttissues. Industrial Park and RECU (water dump) showed the highest Cr concentrations. The highest Ni waterconcentration was observed in Rincon. Industrial Park showed the highest Zn water concentration. The highestPb water concentration was observed in Industrial Park followed by Rincon. The highest Cr and Zn concentrationsin sediment were registered in Industrial Park and Leyes (lake). The sites that showed the highest Niconcentrations in sediment were Industrial Park, RECU (water dump), and Leyes (lake). The high TP concentrationmeasured in the sediment of RECU (water dump) was quite remarkable. Regarding plant tissues, the rootsof Pontederia rotundifolia (Leyes, lake). showed the highest Pb concentration. Typha domingensis showed thehighest concentrations of Cr, Ni, and Zn, in agreement with the highest concentration in sediment. Plants presentinghigh biomass, such as T. domingensis, are needed to obtain an efficient metal removal from water in periurbanwetlands. Studies focused on different rooted species will extend the knowledge about metal phytoremediation,management of peri-urban wetlands that receive pollution, and the use of treatment wetlands asnature-based solutions.