The study compared how well two types of plants, Phragmites communis and Typha latifolia, cleaned up polluted river water in constructed wetlands. Typha latifolia was better at removing pollutants like CODMn, total phosphorus, and total nitrogen compared to Phragmites communis. Typha latifolia removed 37.97% of CODMn, 73.46% of total phosphorus, and 58.53% of total nitrogen, while Phragmites communis removed 28.57% of CODMn, 66.73% of total phosphorus, and 48.32% of total nitrogen. This means that Typha latifolia is more effective at cleaning up polluted water in constructed wetlands than Phragmites communis.