LIANGJin-ming,LIJie,WANGYa-e,et al.Research Progress of Zero-valent Iron Enhanced Constructed Wetlands for Nitrogen and Phosphorus Removal[J].China Water & Wastewater,2024,40(24):1-10.
零价铁强化人工湿地脱氮除磷的研究进展
- Title:
- Research Progress of Zero-valent Iron Enhanced Constructed Wetlands for Nitrogen and Phosphorus Removal
- 摘要:
- 人工湿地作为一种生态友好且低成本的水处理技术已被广泛用于各种类型的污水处理，但是传统的人工湿地处理废水时会受到碳源、湿地结构等因素的影响，导致脱氮除磷效率受限。零价铁作为一种廉价易得的铁基材料已被证明在水处理中可以有效提高硝酸盐的去除效率，并具有强化除磷的能力。介绍了零价铁强化作用下人工湿地中伴随铁氧化还原的脱氮除磷过程相关研究进展，综述了零价铁强化作用下人工湿地中存在的脱氮除磷路径，分析了不同因素对人工湿地脱氮除磷效果的影响，以及零价铁的投加对湿地生态系统和温室气体释放的影响，旨在全面理解零价铁对人工湿地的强化作用与内在机制，为零价铁强化人工湿地脱氮除磷效果、减少温室气体排放提供参考。
- Abstract:
- As a popular eco-friendly and low-cost water treatment technology, the constructed wetland has been widely used in various types of wastewater treatment. However, the efficiency of nitrogen and phosphorus removal can be limited by factors such as carbon sources and wetland structure. To enhance their performance, zero-valent iron (ZVI) has emerged as a promising solution, which is inexpensive and readily available. ZVI has shown high improvement in nitrate removal efficiency during water treatment and has the ability to enhance phosphorus removal. This review comprehensively explores the progress of research on nitrogen and phosphorus removal processes facilitated by iron redox in constructed wetlands enhanced with ZVI. The pathways of nitrogen and phosphorus removal was investigated, and the effects of different influencing factors on the effectiveness of nitrogen and phosphorus removal as well as the effects of ZVI dosing on wetland ecosystems and greenhouse gas release were analyzed. The goal is to comprehensively understand the enhancement effect of ZVI on constructed wetlands, and to provide a reference for the enhancement of nitrogen and phosphorus removal in constructed wetlands and the reduction of greenhouse gas emissions.
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