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Updated: Jul 3, 2026

Supercritical Nitrogen Processing for the Purification of Reactive Porous Materials
Published on: May 15, 2015
[Purification effects on nitrogen under different concentration and nitrogen conformation transform principles by
Pei-fang Wang1, Chao Wang, Xiao-rong Wang
1Key Laboratory of Intergrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China. pfwang2005@hhu.edu.cn
Vallisneria spirialis L. effectively purifies total nitrogen (TN) up to 60 mg/L. Beyond 80 mg/L, its purification effect diminishes, offering insights for managing eutrophic waters.
Area of Science:
- Environmental Science
- Aquatic Ecology
- Bioremediation
Context:
- China's diverse water bodies face varying pollution levels.
- Submerged vegetation plays a role in pollutant purification.
- Vallisneria spirialis L. is a widespread aquatic plant in the Yangtze River basin.
Purpose:
- To assess the nitrogen degradation and accumulation impacts of Vallisneria spirialis L.
- To analyze nitrogen distribution in plant tissues (leaf and root).
- To investigate inorganic nitrogen transformation under varying nitrogen loads.
Summary:
- Vallisneria spirialis L. demonstrated significant total nitrogen (TN) purification at concentrations up to 60 mg/L.
- Nitrogen accumulation in plant tissues correlated with TN load, but leaf-to-root distribution remained constant.
- Ammonia concentration decreased initially but its proportion in inorganic nitrogen increased with higher TN loads.
Impact:
- Vallisneria spirialis L. shows potential for nitrogen removal in eutrophic waters.
- Findings support the use of this plant in wetland restoration projects.
- Understanding plant physiological responses aids in optimizing bioremediation strategies.
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