水生维管束植物对滇池水体的净化效应

利用天然湖塘、湖湾放养水生维管束植物以净化污染水体的研究尚少见报道。本文在滇池北端的草海边利用天然濒湾、湖塘分别放养水葫芦、荇菜荇茭白、莲、满江红5种植物,了解其对富营养及重金属污染水体的净化作用;同时讨论在草海生态系统的水、植物、底泥三部分中,8种元素(N、P、Pb、Cd、Cr、Zn、Cu,Ni)的分布及迁移特征。结果:(1)得出5种植物在一定生长期间内对水和底泥中N、P及重金属的去除率以及对水体COD、浊度、pH值的改善情况;(2)计算了在5月份生长期时,几种植物对N、P及重金属的净化效率;(3)从水中N、P及重金属的分布、迁移特征,讨论了在水-底泥-植物之间元素含量的相互关系。为建立低投资、高效率、易管理的植物净化处理设施提供参考。

THE PURIFICATION EFFICIENCY OF AQUATIC VASCULARPLANTS TO THE POLLUTED WATER IN DIANCHILAKE, KUNMING

This paper deals with the purification efficiency of five hydrophytes growing in natural ponds and estuaries to the eutrophic ation (nitrogen and phosphorus) and heavy-metals polluted water of Dianchi Lake. Kunming.The results show that these hydrophytes can eliminate N,P and heavy metals six elements-Pb,Cd,Cr, Ni, Zn, Cu have been studied) from the water and the mud through absorption and accumulation . As the content of pollutants in water and mud is reduced, the pH value, COD value and the turbidity of t...