中文摘要：

为了减少污水厂尾水直接排放后对地表自然水体造成一定的污染负荷和生态毒害,选择了5种南方常见的水生植物构建不同的表面流人工湿地处理模拟污水厂尾水,研究在室外动态条件下其对污水厂尾水中污染物的去除效果,并探讨季节变化对人工湿地运行效果的影响。结果表明：5种水生植物类型的表面流人工湿地系统对模拟污水厂尾水具有较好的处理效果,并且表现出随运行时间的延长而呈上升的趋势;各组系统之间对COD的去除不存在明显的统计学差异（p〉0.05）;风车草＋再力花组合挺水植物湿地对TN和TP的去除率最高,其次是苦草和黑藻沉水植物湿地系统,紫叶美人蕉＋粉花美人蕉组合生态浮岛和风车草＋再力花组合生态浮岛效果较差;在不同季节条件下的污染物去除率由高到低的顺序为：夏季〉春季〉冬季;温度与COD的去除率无显著相关性,但与TN和TP的去除率呈显著的相关性。

英文摘要：

In order to reduce the pollution load and the ecotoxicity of the tail water directly discharging from sewage plants,five southern common southern aquatic plants were used in different surface-flow constructed wetlands for treating simulated tail water from sewage plant. Removal efficiency of the pollutants in tail water was studied under dynamic outdoor conditions in outdoor. The effect of seasonal change on the performance of constructed wetland was discussed. The results showed that all five different aquatic plant species types of wetland systems had a good beneficial treatment effect in on the period of running,and the removal efficiency of pollutants removal showed an upward trendincreased with the extension of the operation time. However,no significant statistical difference was found betweenin each system on the COD removal of the systems. The highest removal efficiency of TN and TP was achieved by the wetland using the emergent plants Cyperus alternifolius L. and Thalia dealbata F. emerged plants wetland. The wetland using the submerged macrophytes Vallisneria natans and Hydrilla verticillata submerged macrophyte wetland systems was performed in the second place best. While the floating island system with Canna warszewiczii A. Dietr. and Canna glauca L.,and the combined floating island combined system and with Cyperus alternifolius L. and Thalia dealbata F. combined system was the performed worst. The effect of seasonal change on the performance of constructed wetlands was discussed. We found that the removal efficiency of pollutants removal was decreased in the following order： summer spring winter. In addition,a significant correlation was found between temperature and the removal rates of TN and TP but no significant correlation was found between temperature and the COD removal,but significant correlation was existed between temperature and the removal rates of TN and TP.