Purification Efficiency of Different Aquatic Plants on Polluted Inflow River of Taihu Lake

Abstract

Based on building the small aquatic ecosystem in the room, the removal efficiency of total nitrogen (TN) and total phosphorus(TP) in polluted inflow river of Taihu Lake by Cyperus alternifolius(CA), Canna indica(CI), Elodea Canadensis Michx.(ECM) and Ceratophyllum demersum L.(CDL) was researched. The results showed that the removal efficiency of nitrogen and phosphorus in sewage were obvious through these four plants, in which Cyperus alternifolius and Ceratophyllum demersum L. had the better comprehensive purification ability. The order of comprehensive purification ability from strong to weak was: Ceratophyllum demersum L., Cyperus alternifolius, Elodea Canadensis Michx., Canna indica. Research results gave a successful demonstration of ecological treatment to inflow river of Taihu Lake Basin and other similar polluted waters in China.