河岸芦苇、茭白和香蒲植物带处理受污染河水中试研究

利用中试规模的河岸植物带(芦苇、茭白、香蒲)及无植物空白带对受污染河水进行处理,并对它们处理结果进行比较.结果表明,3种植物均能强化污染物的去除.其中芦苇带效果最好,它在整个运行期间对COD、NH₄⁺-N和TP的去除效果分别为43.7%、79.5%和75.2%.对出水溶解氧与水温进行了考察,结果表明植物带水体的溶解氧变化比无植物带小,水温比无植物带低.其中,芦苇带水的溶解氧最高,香蒲带水温和溶解氧最低.芦苇、茭白、香蒲带对河水中污染物的去除和改善水环境条件等方面表现了不同的特点,在河岸带修复时应尽可能保证水生植物的多样性.

Pilot-Scale Study on Riparian Phragmites communis,Zizania latifolia and Typha angustifolia L.Zones Treating Polluted River Water

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.