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The rule of removing phosphorus in small-scale simulated wetland system has been studied.Considering the influence of the environmental factors as dissolved oxygen,pH,etc,we chose not only the aquatic plants,but also rooted emergent macrophyte as the experimental macrophytes.By contrasted four kinds of macrophyte systems,we found out that the absorbency and functionary mode of removing phosphorus by macrophytes are different.As a whole,we found out the three stages model of the density dropping of phosphorus,namely:slope lower stage,steep lower stage,steady lower stage,and the removal rate of each stage is:35.53%, 29.98% and 7.20%.

Primary Study on the Rule of Removing Phosphorus in Simulated Wetland