3. Results and discussion
3.1. Phosphorus removal by the plants
The plants, N. nucifera and C. alternifolius, were well-grown in
the experimental study and had high phosphorus removal efficiency. The remaining phosphorus in the system during the time of study is shown in Table 1. After 5 days of the experiment, N. nucifera
and C. alternifolius removed phosphorus to lower than the acceptable standard guidelines from the U.S. EPA (1991), which is 0.1 mgL1