Wasn't sure where else this would fit;
I was looking for pond realted stuff and found this article from a few years ago on the BBC about using planted rafts to help purify polluted lakes etc.
I know it's an old article but I thought it was still an interesting read for those (like me) who weren't aware of it;
http://www.bbc.com/future/story/20120925-natures-water-purifiers
I also stumbled across this article from the Smithsonian about using marsh plants/wetland systems for sewage filtration;
https://www.smithsonianmag.com/science-nature/wastewater-problem-just-plant-a-marsh-139756791/
Possibly my favourite part of the Smithsonian article is 'sunflowers floating on rafts with their roots dangling in the water are being used to remove cesium 137 and strontium 90 from a pond at Chernobyl. The plants themselves become radioactive waste, which can be handled, and the water is cleansed'.
I was looking for pond realted stuff and found this article from a few years ago on the BBC about using planted rafts to help purify polluted lakes etc.
I know it's an old article but I thought it was still an interesting read for those (like me) who weren't aware of it;
http://www.bbc.com/future/story/20120925-natures-water-purifiers
I also stumbled across this article from the Smithsonian about using marsh plants/wetland systems for sewage filtration;
https://www.smithsonianmag.com/science-nature/wastewater-problem-just-plant-a-marsh-139756791/
Possibly my favourite part of the Smithsonian article is 'sunflowers floating on rafts with their roots dangling in the water are being used to remove cesium 137 and strontium 90 from a pond at Chernobyl. The plants themselves become radioactive waste, which can be handled, and the water is cleansed'.