Xiao Li, Xinlin Liu, Yang Huang, Yulong Zhang, Jian Li
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The findings indicate that elevated summer temperatures, together with the presence of wetland vegetation, promote the release of N through the nitrification process. Additionally, seasonal variations exert a significant impact on the distribution of P storage. Furthermore, the role of constructed wetlands in the absorption and release of N and P is primarily controlled by the influence of organic matter on nitrate-nitrogen, nitrite-nitrogen, and available phosphorus, and is also subject to seasonal fluctuations. In summary, under the comprehensive influence of constructed wetlands, vegetation types, and seasons, sediments within the lake generally exhibit a state of mild or moderate pollution. Therefore, targeted measures should be adopted to optimally adjust vegetation types, and human intervention is necessary, involving timely sediment harvesting during the summer to reduce N and P loads, and enhancing sediment adsorption and retention capacity for N and P during the winter.</p>","PeriodicalId":15732,"journal":{"name":"Journal of environmental quality","volume":"53 3","pages":"340-351"},"PeriodicalIF":2.2000,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Seasonal impact of constructed wetlands on nitrogen and phosphorus in sediments of flood control lakes with pollution assessment\",\"authors\":\"Xiao Li, Xinlin Liu, Yang Huang, Yulong Zhang, Jian Li\",\"doi\":\"10.1002/jeq2.20561\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The primary drivers of eutrophication in lakes following the reduction of external nutrient inputs are the release of N and P from sediments. 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引用次数: 0
摘要
外部营养物质输入减少后,湖泊富营养化的主要驱动因素是沉积物中氮和磷的释放。人工湿地在改善氮、磷和其他生物元素水平方面发挥着关键作用。然而,这些湿地中大量植被的存在也会大大加剧沉积物中营养物质的积累,这种现象受季节变化的影响很大。本研究选择了一个典型的人工湿地作为研究地点。研究旨在分析夏季和冬季沉积物中氮和磷的形态。同时,在研究区域内进行了全面的污染评估和分析。研究结果表明,夏季气温升高,加上湿地植被的存在,通过硝化过程促进了氮的释放。此外,季节变化对 P 储存的分布也有重大影响。此外,人工湿地在吸收和释放氮和磷方面的作用主要受有机物对硝酸盐氮、亚硝酸盐氮和可利用磷的影响控制,同时也受季节波动的影响。综上所述,在人工湿地、植被类型、季节等因素的综合影响下,湖内沉积物总体呈现轻度或中度污染状态。因此,应采取有针对性的措施对植被类型进行优化调整,同时有必要进行人工干预,包括夏季及时收割沉积物以减少氮、磷负荷,冬季提高沉积物对氮、磷的吸附和滞留能力。
Seasonal impact of constructed wetlands on nitrogen and phosphorus in sediments of flood control lakes with pollution assessment
The primary drivers of eutrophication in lakes following the reduction of external nutrient inputs are the release of N and P from sediments. Constructed wetlands play a pivotal role in ameliorating N, P, and other biogenic element levels. However, the presence of large vegetation in these wetlands also substantially contributes to nutrient accumulation in sediments, a phenomenon influenced by seasonal variations. In this study, a typical constructed wetland was selected as the research site. The research aimed to analyze the forms of N and P in sediments during both summer and winter. Simultaneously, a comprehensive pollution assessment and analysis were conducted within the study area. The findings indicate that elevated summer temperatures, together with the presence of wetland vegetation, promote the release of N through the nitrification process. Additionally, seasonal variations exert a significant impact on the distribution of P storage. Furthermore, the role of constructed wetlands in the absorption and release of N and P is primarily controlled by the influence of organic matter on nitrate-nitrogen, nitrite-nitrogen, and available phosphorus, and is also subject to seasonal fluctuations. In summary, under the comprehensive influence of constructed wetlands, vegetation types, and seasons, sediments within the lake generally exhibit a state of mild or moderate pollution. Therefore, targeted measures should be adopted to optimally adjust vegetation types, and human intervention is necessary, involving timely sediment harvesting during the summer to reduce N and P loads, and enhancing sediment adsorption and retention capacity for N and P during the winter.
期刊介绍:
Articles in JEQ cover various aspects of anthropogenic impacts on the environment, including agricultural, terrestrial, atmospheric, and aquatic systems, with emphasis on the understanding of underlying processes. To be acceptable for consideration in JEQ, a manuscript must make a significant contribution to the advancement of knowledge or toward a better understanding of existing concepts. The study should define principles of broad applicability, be related to problems over a sizable geographic area, or be of potential interest to a representative number of scientists. Emphasis is given to the understanding of underlying processes rather than to monitoring.
Contributions are accepted from all disciplines for consideration by the editorial board. Manuscripts may be volunteered, invited, or coordinated as a special section or symposium.