A Comparison of the Purification Capacity of Five Plant Types Cultivated on Floating Beds for Restoration of Aquatic Environment

    January 2012 in “ Journal of Beijing Normal University ”
    LI Wen-fen
    TLDR Canna indica is the best plant for water purification.
    The study compared the purification capacity of five plant types (canna, reed, water onion, water hyacinth, water celery) cultivated on floating beds for controlling eutrophication in Zhuhai Pearl Wu Chung. The plants were evaluated based on growth, chemical oxygen demand (COD), ammonia (NH3-N), total nitrogen (TN), and total phosphorus (TP) absorption. Canna indica showed the highest rates of COD and NH3-N removal, as well as nitrogen and phosphate uptake, making it the most effective plant for water purification. Reed was recommended as a supplementary plant, with water onion and water celery used in smaller portions. Significant differences in the absorption rates of these pollutants were observed among the plant species.
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