几种水生植物去污能力比较研究

Study on Purification Ability of Four Different Hydrophytes

在人工模拟条件下,利用室内试验箱培育,研究了挺水植物芦苇、慈姑和浮叶植物睡莲、荇菜对人工配置污水的净化效果。结果表明,4种水生植物均能有效吸收污水中过剩的氮、磷营养物质,经过20d植物处理,对水体中氮素去除率表现为芦苇(77.25%)>慈姑(76.16%)>荇菜(75.13%)>睡莲(71.69%),对磷素去除率表现为芦苇(78.97%)>慈姑(75.76%)>荇菜(75.23%)>睡莲(73.09%);4种水生植物对污水中的氮磷去除效果均比较明显,在相同条件下脱氮除磷效果最好的是挺水植物芦苇。

In order to investigate hydrophytes role on the purification of pond effluent which was eutrophic,four hy-drophytes（Nymphaea alba,Sagittaria,Phragmites australis,Nymphoides peltatum）were grown and as a none plantto compare effectiveness of nutrient removal. It can be concluded that all the hydrophytes had a good performance onremoval nutrients from treated water rather than without hydrophytes. After growing the four hydrophytes 20 days,thetotal nitrogen（TN）was removed by P. australis（77.25%）Sagittaria（76.16%）〉O.Kuntze（75.13%）〉Nymphaea alba（71.69%）. The total phosphorus（TP）was removed by P.australis（78.97%）Sagittaria（75.76%）〉O. Kuntze（75.23%）〉Nymphaea alba（73.09%）;Four hydrophytes to remove the effect of nitrogen and phosphorus in the sew-age. For the four hydrophytes growing under the same condition P.australis was the most effective hydrophytes for TNand TP removal.