What about Eichhornia crassipes (water hyacinth)? I got to know this plant last spring in India. It is a weed (doubling in less than 12 days) and it creates floating mats. It is a neophyte in Asia (original from Brazil). If a mat is getting old, there are even other plants that can start growing on these floating mats. They are often also used for water treatment. I know that they are very efficient in taking up nutrients. For Fe you would have to find out.
thanks a lot Sabine , i would look more into detail about the plant you specified . i appreciate your valuable response
I just stumbled across this paper. Might be of interest for you.
PHYTOREMEDIATION OF METALS BY AQUATIC PLANTS AT NATURAL WETLANDS IN MAJOR LAKES (INDUSTRIAL CITY) HOSUR, KRISHNAGIRI DISTRICT, INDIA
S. Elumalai*, K. Somasundaram, R. Sakthivel, S. Ramganesh, V. Prakasam
In constructed wetland for waste water purification/treatment, I saw a mattress (foam) (I*1*0.3) m nicely designed and a tropical vegetation of Papyrus planted. The mattress provided a floating media. I did not take picture.
Typha domingensis, Eichornia crassipes, Salvinia spp, Pistia stratiotes, Lemna spp and Mayaca are very suitable plants for creating an artificial floating matt with bioremediation purposes! The inclusion of some aquatic and palustrine Utricularia (for example U. foliosa, U. gibba) would be interesting, as they work as bioindicators of environmental quality... Search for "living machines"+ biofiltration.
Just be careful - it depends in what country/area you want to create these wetlands. If species such as Eichornia crassipes, Salvinia spp, or Pistia stratiotes aren't indigenous to your area it might be dangerous to propagate them as they can become uncontrollably invasive.
It is a weed called duckweed [lemna minor] which is more suitable for the tropical country .because it is doubling quickly within 3 days.
Wetland Plants for Constructed Wetlands and Stormwater ...
www.northinlet.sc.edu › training › media › resources › Wetland Plants for ...
areas, urban stormwater is the major component of sewer and stream flows. As an area becomes ... suitable plants for a wetland wastewater filter
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