Assessment of secondary metabolites in planted into constructed wetlands using shale and laterite as substrate for wastewater treatment.

Constructed wetlands (CWs) are systems designed to maximize pollutants removal by various mechanisms, most of which are associated with the presence of plants. However, the substances secreted by plants to defend themselves against external aggressions during their growth are very little studied in these systems. This study aimed to characterize the chemical constituents of extracts used in an experimental mesocosm filled with shale and laterite treating domestic wastewater.