The Study of Purification Effect of Plants in Constructed Wetland

摘要

Detailed research on the selection and comparison of the purification effect of hydrophytes including reeds,bulrush,cattail and spiked loosestrife in constructed wetland.After an experiment of 15 days,it proves that plants have effect on water quality:pH basically reached 7.0; NH3-N,TP,TN removal rate reached 50％,40％,25％ respectively.And the selecting sequence is cattail ＞ reed ＞ bulrush ＞ spiked loosestrife.