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重建了中国湖西部循环300年的历史

Shiyan Liu¹, Pengcheng Ju², Yafang Song³

¹School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, Anhui, China.

The Science of the total environment

|July 10, 2024

概括

在过去的300年里,人类活动加快了查胡湖的和化. 沉积物中的铁结合在调节营养循环和湖泊生态系统健康方面发挥着关键作用.

科学领域:

环境科学环境科学
地质化学地质化学
临界技术临界技术

背景情况:

人类活动增加了水生系统中营养物质的负载,特别是 (P),导致了化.
了解湖泊中的P循环对于管理缩和生态系统干扰至关重要.

研究的目的:

研究P和铁 (Fe) 在过去的300年里在Chaohu湖西部循环的历史演变.
确定控制P循环和优化作用的因素,在这个典型的优化湖.

主要方法:

结合210Pb-137Cs年代和元素分析用于历史重建.
P阶段分离和Fe分化分析.
P K-边缘X射线吸收近边缘结构 (P XANES) 用于P的特异化.

主要成果:

自20世纪60年代以来,P输入和有机碳埋葬的急剧升级,与区域人口增长有关.
结合铁的P (PFe) 是主导的P池,调节反应性的P (Preac) 趋势.
沉积物的特点是Fe (水氧化物 (Feox) 含少量 pyrite,表明有氧化的环境有利于与Fe氧化物的P封存.

结论:

人类活动是Chaohu湖缩的主要驱动因素.
沉积物中P和Fe氧化物的合是P结合的关键机制.
未来的管理策略可以利用Fe-P相互作用来从水柱中去除P.

关键词:

查胡湖 (Chaohu Lake) 是一个大湖.环境管理环境管理欧洲化是什么意思?的循环循环活动再氧化条件的条件是:

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相关概念视频

The Phosphorus Cycle

The Phosphorus Cycle

Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.

What are Biogeochemical Cycles?

What are Biogeochemical Cycles?

The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.