Plants have a certain degree of purification for water pollution, especially aquatic plants. The plants
with strong absorption for pollutants and good tolerance could be planted in the polluted water.
Accordingly water pollutants were removed or fixed through adsorption, absorption, accumulation and
degradation by the plants for water purification. The plants for restoration commonly used Reed, E.
crassipes(water hyacinth), cattail, A. philoxeroides, etc [12].