中国最大的城市湖的内部负荷和监管机制:对优化管理的影响
Yuyi Wang1, Chuanzhe Sun2, Yanjun Wu3
1School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China.
Journal of environmental management
|December 25, 2025
概括
湖泊沉积物的内部释放受到硫循环的显著影响,特别是在温暖的月份. 管理沉积物和氧气水平可以减轻城市湖泊的环氧化.
科学领域:
- 环境化学环境化学
- 临界技术 临界技术
- 地质化学 地质化学
背景情况:
- 沉积物的内部 (P) 负载加剧了湖泊中的环氧化.
- 关于城市湖泊沉积物中的P,硫 (S) 和铁 (Fe) 合以及P释放机制的数据有限.
研究的目的:
- 为了研究P,S和Fe在城市中化的湖泊沉积物中的合.
- 了解调节P释放的机制及其与S循环的关系.
主要方法:
- 从中国唐顺湖 (Tangxun Lake) 实地采样,在三个不同P负荷的地点进行了一年多的实地采样.
- 使用高分辨率透析 (HR-Peeper) 和薄膜扩散梯度 (DGT) 来测量SRP,Fe,P/Fe/S和SRP流量.
- 统计分析以确定P流的控制因素.
主要成果:
- 在温暖的季节,DGT-labile P和S趋势是同步和正相关的,这表明硫循环控制了P的重新调动.
- 溶解硫酸盐降解 (DSR) 在温暖的季节对沉积物-水界面 (SWI) 的高SRP流量作出了重大贡献.
- 在不同地点,SRP流量显著变化 (0.1849.41 mg m−2 d−1),与沉积物P含量相关,在夏季/秋季更高.
结论:
- 硫循环在这个城市湖的内部P动态中起着主导作用.
- 溶解氧 (DO) 和沉积物可用的P是控制P流量的关键因素.
- 减少沉积物P池或在温暖时期实施人工氧化可以减轻有问题的SRP流和轻化.
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