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| DOI：10.13522/j.cnki.ggps.2022261 |
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| Study on the Removal Effect of Nitrogen and Phosphorus in Eutrophic Water by Different Plants |
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LIU Jiaomei
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1. China Railway Fifth Survey and Design Institute Group Co, LTD., Beijing 102600, China;
2. Beijing China Railway Eco-Environment Design Institute Co., LTD., Beijing 102600, China
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| Abstract: |
| 【Objective】To study the removal effect of different aquatic plants on nitrogen and phosphorus pollutants in polluted water, so as to provide support for the construction of ditch wetland system.【Method】The common aquatic plants such as reed, papyrus, water spinach and water lily in the water area of my country were selected as the research objects. The dynamic changes of nitrogen and phosphorus uptake in sewage with different concentrations by four aquatic plants were studied, and the removal of nitrogen and phosphorus by aquatic plants at different growth stages was also studied.【Result】In the three polluted water bodies of reed, papyrus and water spinach, with the increase of nitrogen and phosphorus pollution concentrations, the denitrification and phosphorus removal effects were enhanced. In terms of phosphorus removal, reed absorbs the most phosphorus in the vegetative growth period, and pupa and water spinach absorb a large amount of phosphorus in the germination period.【Conclusion】In comprehensive consideration of the denitrification and phosphorus removal effects of four aquatic plants, as well as their landscape and economic values, three emergent plants, reed, papyrus and water spinach, were selected as the dominant plant species for ecological restoration of ditch wetlands. |
| Key words: aquatic plants; nitrogen and phosphorus removal; eutrophication; agricultural non-point source pollution |
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