Pilot-Scale Study on Riparian Phragmites communis,Zizania latifolia and Typha angustifolia L.Zones Treating Polluted River Water
河岸芦苇、茭白和香蒲植物带处理受污染河水中试研究

Pilot-scale riparian zones(no aquatic plant zone,Phragmites communis,Zizania latifolia,and Typha angustifolia L.zone)were used to treat polluted water.Their results of treatment were compared.It is shown that the vegetation zones can enhance removal of pollutants and Phragmites communis zone is the best in all four riparian zones.The average removal of the Phragmites communis zone is 43.7% for COD,79.5% for ammonia and 75.2% for total phosphorus respectively.The dissolved oxygen(DO) and temperature of the effluent from the four water zones are also investigated.It shows that DO of effluent from the vegetation zones are more stable than that from the no vegetation zone,and the temperature of water from the vegetation zones are lower than that from the no vegetation zones.In the three vegetation zones,the Phragmites communis zone has the highest DO and the Typha angustifolia L.zone has the lowest water temperature and DO.Different vegetation zones have different merits in removing pollutants in water and in improving water environment.More species of aquatic plants should be planted in riparian restoration in order to keep biological diversity.