【摘要】 季节变化与植物生长状况直接影响人工湿地污染物净化效果。对两个人工湿地的芦苇、风车草、旱伞竹、美人蕉、香蒲、菖蒲及姜花生长状况(株高、冠幅、分蘖、底径)、地上部分生物量等植物生长状况数据进行了为期两年的观测与记录,同期对人工湿地、各工艺段的进水及出水进行了采样及监测。研究表明,湿地植物对污染物的迁移能力直接关系到湿地系统的运行效果,这种迁移能力与植物生长量、污染物蓄积能力和生物量的生产速度有关,同时,影响植物生长量的因素又都会影响植物对污染物的同化和迁移。在春季和夏季,植物生长迅速,TN、NH3-N去除率保持在60%左右,TP、COD去除率保持在50%左右。在秋季和冬季,植物逐渐衰败及死亡,TN、NH3-N、COD去除率仅为40%左右。更多还原

【Abstract】 Seasonal changes and plant growth conditions have a directly affect on pollutant removal efficiency of the constructed wetland.During two years,this study observed and recorded plant growth conditions,such as biomass of the over ground part and growth conditions of reed,clinopodium urticifolium,cyperus alternifolius,canna,cattail,camalus and garland-flower in constructed wetland.At the same time,the water quality of inflow and outflow of the constructed wetland and every process were sampled and monitored.Studies have shown that the pollutant migration ability of wetland plant is directly related to the operation effect of wetland system.And this migration ability relates to plant growth,pollutants accumulation ability and biomass production speed.Besides,studies also have shown that,factors which affect plant growth affect plant assimilation and migration which act on pollutant.In spring and summer,plants grow rapidly.The removal rates of TN,NH3- N are maintained at about 60%,and that of TP,COD remained at about 50%.In fall and winter,plants die.Therefore,the removal rates of TN,NH3- N and COD remain only about 40%.更多还原