【摘要】 为辽河流域河岸缓冲带生态建设和面源污染治理提供理论依据,采用盆栽模拟法,以蛭石为基质,研究了紫花苜蓿、白三叶、黑麦草、高羊茅和早熟禾等草本植物对污水中TN、TP和COD的净化效果。结果表明:不同草本植物对TN、TP和COD等污染物均表现出较好的净化效果,随着生长时间的延长,对其净化率呈下降趋势。不同草本植物,对TN的净化效果依次为紫花苜蓿>白三叶>高羊茅>黑麦草>早熟禾,对TP的净化效果依次为白三叶>高羊茅>黑麦草>紫花苜蓿>早熟禾,对COD的净化效果依次为高羊茅>白三叶>黑麦草>紫花苜蓿>早熟禾。第35天时,紫花苜蓿和白三叶对TN的净化效果较好,净化率分别为26.80%和24.99%;白三叶和高羊茅对TP的净化效果较好,净化率分别为66.28%和65.48%;高羊茅和白三叶对COD的净化效果较好,净化率分别为36.85%和34.46%。更多还原

【Abstract】 The purification effect of Medicago sativa,Trifolium repens,Lolium perenne,Festuca arundinacea and Poa pratensis on TN,TP and COD in sewage was studied by using potting simulation method based on vermiculite to provide the theoretical basis for ecological construction and non-point source pollution management of riverside buffer zone along Liaohe River Basin.The results showed that 5tested herbaceous plants all have good purification effect on TN,TP and COD in sewage,and the purification rate show a declining trend with elongation of their growth time.The TN,TP and COD purification effect of 5tested herbaceous plants is Medicago sativa > Trifolium repens.>Festuca arundinacea >Lolium perenne>Poa pratensis,Trifolium repens> Festuca arundinacea >Lolium perenne> Medicago sativa>Poa pratensis.and Festuca arundinacea > Trifolium repens> Lolium perenne> Medicago sativa>Poa pratensis respectively.The TN purification rate of Medicago sativa and Trifolium repens can reach 26.80% and 24.99 after 35drespectively.The TP purification rate of Trifolium repens and Festuca arundinaceais up to 66.28% and 65.48% after 35 dseparately.The COD purification rate of Festuca arundinacea and Trifolium repens is 36.85% and 34.46% after 35 d respectively.更多还原