[Objective] Nitrogen and phosphorus removal rates and tolerances of 4 submerged plants were studied to provide basis for selection of plants growing in landscape reservoirs supplied with reclaimed water.[Method] Hydrilla verticillata,Elodea canadensis,Potamogeton crispus and Ceratophyllum demersum were planted in reclaimed water with different total nitrogen (TN) and total phosphorus(TP) concentrations.TN and TP were measured during the experiment and regression equations between concentrations of TN and TP with time were established.Then,the removal of nitrogen and phosphorus was studied.[Result] TN and TP dissipated as the increase of plants planting time with negative exponent relationship.The capacity of plants purification is associated with not only plant species but also the TN and TP initial concentration.Hydrilla verticillata had the highest TN removal rate in reclaimed water while Ceratophyllum demersumI had the lowest.Elodea canadensis had the highest TP removal rate,while Ceratophyllum demersum had the lowest.Potamogeton crispus had the widest nitrogen tolerance while Ceratophyllum demersum had the narrowest.Elodea canadensis had the widest phosphorus tolerance while Ceratophyllum demersum had the narrowest.[Conclusion] When TN concentration was 5-15 mg/L and TP concentration was 0.5-1.5 mg/L,Hydrilla verticillata and Elodea canadensis had high removal rates and they can be chosen as pioneer plants to improve water quality of landscape lakes supplied with reclaimed water.
submerged plantreclaimed waterremoval ratetolerance range
NETL
NSTL
维普
万方数据
