This common wetland plant sucks up 'forever chemicals' best
Gao C, Hua ZL, Gu L
Phytoremediation
If you've got a rain garden or pond edge, knowing that umbrella plant, soft rush, canna, and iris each handle water pollution differently can help you pick the right species to filter runoff naturally.
Researchers grew four popular water-garden plants, umbrella plant, soft rush, canna lily, and iris, in water spiked with PFAS, the persistent 'forever chemicals' found in nonstick coatings and firefighting foam. Umbrella plant turned out to be the champion accumulator, soaking far more of the chemicals into its roots and shoots than the others, largely because it grows an especially long, dense root system. Each plant also fought off the chemical stress in its own way: one leaned on sugar and acid shifts, another on its antioxidant defenses, showing that picking the right plant matters a lot for cleaning up contaminated water.
Key Findings
Umbrella plant (Cyperus alternifolius) accumulated the most PFAS of the four species tested, with roots reaching 19,909 ng/g and shoots 11,561 ng/g, linked to its longer root system (750 cm total length)
A newer PFAS alternative called F-53B built up strongly in plant tissue but moved poorly from roots to shoots (translocation factor below 0.5), meaning it stayed concentrated near the roots
Each species used a different coping strategy: umbrella plant boosted nitrogen-related metabolism, soft rush relied on sugar/acid adjustments, iris leaned on glutathione antioxidant defenses, and canna lily showed weaker stress responses overall
chevron_right Technical Summary
Scientists tested four wetland plants for their ability to soak up 'forever chemicals' (PFAS) from water and found one, umbrella plant (Cyperus alternifolius), pulled in far more contamination than the others thanks to its dense root system, while each species used a different internal chemistry trick to cope with the toxic buildup.
Abstract Preview
Original paper
Adaptive strategies of emergent plants to per- and polyfluoroalkyl substances.
Emergent macrophytes are key components in the phytoremediation of per- and polyfluoroalkyl substances (PFAS)-contaminated wastewaters, yet comparative evidence on species-specific bioaccumulation ...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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