浮岛植物净化水质效果研究

研究了人工浮岛对模拟滞流景观水体的水质改善效果,并比较了五种浮岛植物对污染物的去除效率.结果显示,处理7d左右水体TN、NH3-N、TP和COD去除率迅速增加,透明度显著增大,延长处理时间有利于污染物的去除,但植物根系分泌物会增加水体的色度.经45 d处理,鸢尾对TN、NH3-N、TP和COD等污染物的整体去除效果最好...

Effect of Floating-island Plant on Water Purification

This paper studied on the water quality improvement effect of artificial floating-island on imitated stagnating landscape waters and compared the pollutant removal efficiency of 5 kinds of floating-island plants.Result showed that after about 7 days’treatment,the removal rate of TN,NH3-N,TP and COD were obviously reduced and the transparency was significantly increased.Extending treatment time was good for pollutants removal,but the secretions of plant root could increase water color.After 45 days’treatment,Iris tectorum showed the best integrate effect on TN,NH3-N,TP and COD removal,with the removal rate of 83.5%,86.9%,50% and 70.7% respectively,and it could be the preferred water purification plant.Canna lily played the strongest role in delaying and inhibiting the algae outbreak and its effect on TN,NH3-N and COD removal was similar to Iris tectorum,except of low phosphorus removal rate.Spiked Loosestrlfe and Cyperus alternifolius had better effect on phosphorus removal,but with poor effect on inhibiting algae outbreak.The ability of Sagittaria sagittifolia in pollutants removal was weak.Aiming to enhance the integrated pollutant removal rate,the mixed planting of Iris tectorum,Canna lily and Spiked Loosestrlfe,Cyperus alternifolius could be adopted.