人工湿地处理污染河水和湿地植物腐烂分解影响研究

以高原复合型人工湿地为研究对象，在水力负荷为0．067m／d的条件下，监测湿地对CODCr、TN、TP、氨氮的去除率达到了66．3％、82．5％、43．2％、76％；采集了梭鱼草、美人蕉、芦苇、水葱、茭白、再力花6种挺水植物地上部分，测定了它们的TN、TP、有机质等营养物质含量和它们腐烂分解过程中TN、TP、COD等释放强度。结果表明：梭鱼草、美人蕉、茭白释放强度较强，再力花和芦苇释放强度较弱，在选择湿地植物时综合考虑植物吸收污染物能力情况下，可以优先考虑再力花、芦苇等植物。

Research on Decomposition of Wetland Plants and Treatment of Polluted Water by Constructed Wetland

The average removal rate of COD and total nitrogen and total phosphorus and ammonia nitrogen are 66. 3% and 82. 5% and 43. 2% and 76% respectively under the condition of HLR of 0. 067m/d by monitoring the treatment rate of constructed wetland. Six kinds of wetland plants are collected involving in pontederia cordata and canna indica and zizania latifolia and stapf and phragmites australis and thalia dealbata to be detected with contents of TN and TP and organic matter, release rate of TN and TP and COD as well. The results show that there is higher release rate of pontederia eordata and canna indica and zizania latifolia, however, the rates of phragmites australis and thalia dealbata are weaker, therefore, phragmites australis and thalia dealbata can be selected firstly as wetland plants.