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%。
The purification effect of Medicago sativa, Trifolium repens, Loliurn 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 5 tested 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 5 tested herbaceous plants is Medicago sativa 〉 Trifolium repens. 〉 Festuca arundinacea 〉 Loliurn perenne 〉 Poa pratensis, Tri folium repens 〉 Festuca arundinacea 〉 Loliurn perenne〉 Medicago sativa 〉 Poa pratensis, and Festuca arundinacea 〉 Trifolfurn repens 〉 Loliurn perenne〉 Medicago sativa〉Poa pratensis respectively. The TN purification rate of Medicago sativa and Trifolium repens can reach 26. 80% and 24. 99 after 35 d respectively. The TP purification rate of Trifolium repens and Festuca arundinacea is up to 66.28% and 65.48% after 35d separately. The COD purification rate of Festuca arundinacea and Trifolium repens is 36. 85% and 34. 46% after 35 d respectively.
出处
《贵州农业科学》
CAS
北大核心
2014年第12期217-220,共4页
Guizhou Agricultural Sciences
基金
国家水体污染控制与治理科技重大专项子课题资助项目"辽河源头区水污染综合治理技术及示范研究"(2012ZX07202-009)
吉林省教育厅"十二五"科研项目"松花江沿岸面源污染截留技术研究"(2014385)
关键词
陆生草本植物
TN
TP
COD
净化率
terrestrial herbaceous plant
TN
TP
COD
purification rate
