Role of Plants in Water Filtration. The objective of the exercise in this document is to understand the role of plants in filtering the water moving through a watershed. You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
ContactPlants That Filter Water. Heavy metals, bacteria, oil and other pollutants can be removed with the help of wetland plants. Cattail, typically growing between 5 and 10 feet tall, can remove metals such as zinc, cadmium, lead and nitrate from water.Water mint, or Mentha aquatica, grows up to 6 inches high with light purple flowers and should be first planted in a container before being moved to
ContactAll plants have this natural cycle through them, but the water species mentioned are especially designed for this water cycle. Using the right plants to purify and filter water will clean and remove: Heavy metals Harmful bacteria Parasites Radio active isotopes (porous carbon and green coal work much better than plants) Chemicals
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