Typha latifolia ?common cattail? as a green tool in the waste water recycling process in Argentine. A case of study about bioaccumulation and biodegradation of contaminants of emerging concern.

DOUCETTE, WILLIAM; LOMBARDERO, LUCAS RODRIGO; PÉREZ, DÉBORA JESABEL; MENONE, MIRTA LUJÁN; MOORE, MATTHEW

Dresden

Conferencia; 5th Green and Sustainable Chemistry; 2020

University of Leuphana

Introduction: Argentina is a developing country where the implementation of wetland plants could be a green promise tool to reduce the contaminants of emerging concern (CEC) levels in the reclaimed water process. Methods: To this end, thirty-six plants hydroponically grown of cattails (Typha latifolia) were exposed to carbamazepine, fluoxetine, gemfibrozil, trichlosan and atrazine at environmentally relevant concentrations near 20 µg/L, under semi-static exposure bioassay. Uptake, distribution, bioaccumulation of CECs and the biodegradation of atrazine within the plants were evaluated at several time periods over a 42 day growing period. Whole plants were harvested at days 7, 14, 21, 28, 35 and 42 days. Concentrations of CECs in various plant tissues were determined after extraction, concentration and cleanup by LC-MSMS. Results: Carbamazepine, fluoxetine, gemfibrozil, triclosan and atrazine were detected in all underwater tissues (roots, rhizome and sprouts) and abovewater tissues, except gemfibrozil which was not detected in shoots (Fig.1). Carbamazepine concentrations were 30-40 times highest in upper leaves than below-water tissues, its accumulation was depended the exposure time and water transpirated (Fig.1 and Fig.2). Above-water tissue concentrations for fluoxetine were highest in the lower leaves and similar to the concentrations in the below water tissues. Triclosan concentrations were greatest in roots and were about 50 higher than leaves. Atrazine and its metabolites (desethyl-atrazine, desisopropyl-atrazine) were bioaccumulated in middle and upper leaves. Discussion: The results show that the root uptake, translocation and distribution within the plant tissues varies with the physical chemical properties of CECs and longer exposures result in higher leaf concentrations for those compounds that are translocated from root to shoot. This study highlight the importance to use an American native hydrophyte in natural, semi-natural or constructed wetlands for reduce CEC levels in the reclaimed water process, a bio-resource green tool which was actually not common implemented in Argentina in the water treatment plant.