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在经过处理十年后,在波罗的海沉积物中持续结合和积累

Emil Rydin¹, Brian J Huser², Oskar Agstam-Norlin²

¹Stockholm University Baltic Sea Centre, Stockholm University, Stockholm 106 91, Sweden.

|June 20, 2025

概括

(Al) 处理盐的环氧化海湾有效地将 (P) 结合到沉积物中,在十年内增加了P的保留. 这种方法在盐水环境中被证明是稳定的和功能性的,减轻了有害的P的释放.

科学领域:

环境科学环境科学
海洋化学海洋化学
欧洲化管理欧洲化管理

背景情况:

封闭的沿海湾中缩导致无毒条件和沉积物中 (P) 结合能力降低.
波罗的海的海湾Björnöfjärden经历了这样的条件,需要创新的P管理策略.

研究的目的:

评估 (Al) 处理在增强P结合能力和减少P流量方面在盐河口环境中的长期有效性.
在Al注射后的十年内,监测沉积物中的P积累和Al分布.

主要方法:

将 (Al) 溶液注入到Björnöfjärden的 euxinic 沉积物中.
在十年内广泛监测P积累和总P (TP) 含量.
测量沉积物形状内的Al分布,以了解Al-P的形成和保留.

主要成果:

处理显著增加了沉积物P结合能力,并减少了P流向水质.
Al-P形成在6至10厘米深度之间达到顶峰,十年后TP含量达到3.5g P/m2.
Al-P形成稳定在0.6毫克P/m2/day,加Al与形成的Al-P的重量比例约为7:1 .

结论:

的添加有效地提高了沉积物P的保留和积累在盐的环境在十年的时间尺度.
对水中Al-P结合的疗效和长期稳定性的担忧没有得到实现.
这项研究证明了基于Al的P管理在面临缩的河口生态系统中的可行性.

关键词:

(Al) 是一种在Björnöfjärden,我们可以看到.盐水是盐水中的一种.内部装载内部装载沉积物沉积物是一种沉积物.

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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.

Factors Affecting Solubility

Factors Affecting Solubility

Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide: