不同水生植物对富营养化水体中氮磷去除效果的比较

通过设置3种不同浓度的富营养化水体净化试验,研究了菖蒲、香蒲、鸢尾生长状况及对3种不同富营养化水体中氮和磷的去除效果。结果表明,鸢尾和香蒲在3种浓度的富营养化水体中均能生长,菖蒲在高浓度水体中生长受到影响,这3种植物对不同浓度的富营养化水体中的氮、磷的去除率不同,鸢尾对3种不同富营养化程度水体的总氮的去除率分别为69%、88.8%、69.9%,菖蒲为66.5%、82.2%、54.2%,香蒲为64.1%、77%、74.3%;对水体总磷的去除率鸢尾为70%、87.7%、77.5%,菖蒲为54%、80%、55.8%,香蒲为44%、60.5%、61.6%。试验表明,3种植物均能显著改善富营养化水体的水质。各项指标综合分析可见,3种植物中鸢尾对富营养化水体的净化效果最好,香蒲对水体的净化效果最差,尤其是对水体中磷的去除。

Effects of Hydrophytes on Removal of Nitrogen and Phosphorus in Eutrophic Water

The growth conditions of three kinds of aquatic plant was researched by purification experiments of three different concentrations of eutrophic water,three kinds of aquatic plant namely Acorus calamus,Typha orientalis,Iris tectorum,and purification effection in three different eutrophication water were compared,and nitrogen and phosphorus removal capacity of eutrophic water were analyzed.The results showed Typha orientalis and Iris tectorum could grow normally in three levels of eutrophication water,while the growth of Acorus calamus in the high concentration of water was affected.There were significant differences in the removal efficiency of nitrogen and phosphorus in eutrophic water.In the three kinds of eutrophic water,the total nitrogen removal rate of Iris tectorum were 69%,88.8%,69.9%,Acorus calamus 66.5%,82.2%,54.2%,Typha orientalis 64.1%,77%,74.3%,respectively.And the total phosphorus removal rate of eutrophic water of Iris tectorum were 70%,87.7%,77.5%,Acorus calamus 54%,80%,55.8%,Typha orientalis 44%,60.5%,61.6% respectively.The result showed three plants could obviously improve the quality of eutrophication water.The comprehensive analysis about the indicators showed Iris tectorum has strong ability to remove nitrogen and phosphorus,Typha orientalis of the worst removal rate,especially on phosphorus removal.