Water Quality Purifying Effect of Five Kinds of Aquatic Plants in Winter
[Objective]The aim was to compare the water quality purifying effect of five kinds of aquatic plants.[Method]Model of surface flow wetlands was constructed in the river bank of Jialu River in Zhengzhou City,and five kinds of aquatic plants which could grow normally in winter were selected and introduced for screening experiment of aquatic plants.[Result]Five kinds of plants were growing well,and they showed strong cold resistance.However,there were some differences on water quality purifying ability among five kinds of aquatic plants,in which Oenanthe javanica and Elodea canadensis performed better on removing the TN,the removal rate was 44% and 41% respectively;Iris sibirica and O.javanica showed better performance on the removal of TP,the removal rate was 41% and 37% respectively;there was little difference on the removal effect on NH4+-N among five kinds of plants,in which E.Canadensis performed best with the removal rate of 73%,followed by O.javanica(the removal rate was 71 %),and the removal rate of I.sibirica,Rumex acetosa and Potamogeton crispus were 70%;there was no significant purification effect of five kinds of plants on CODCr,in which I.sibirica and R.acetosa performed better,and the removal rate was 14% and 13% respectively.[Conclusion]The emerging plants and submerged plants hydrophytes could be used to construct floating aquatic macrophyte-based treatment system(FAMS)in wetland vegetation allocation to improve the purification effect of wetlands of North China in winter.
NETL
NSTL
万方数据
